WO2023093502A1

WO2023093502A1 - Charging device and electric device

Info

Publication number: WO2023093502A1
Application number: PCT/CN2022/130066
Authority: WO
Inventors: 骆兴国; 胡璐; 陈小波
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2021-11-29
Filing date: 2022-11-04
Publication date: 2023-06-01
Also published as: CN216850070U

Abstract

The present application provides a charging device and electric device. The charging device for a battery provided by a first aspect of the present application comprises an air cooling system. The battery comprises a gas inlet valve and a first gas outlet valve. The air cooling system blows a gas into the battery through the gas inlet valve, and the battery discharges the gas through the first gas outlet valve. While maintaining the original charging capacity of the charging device, addition of the air cooling system to cool the interior of the battery when the battery is being charged reduces the thermal runaway risk of the battery.

Description

Charging devices and electrical equipment

This application claims priority to Chinese patent application 202122957173.0, filed on November 29, 2021, entitled "Charging Device and Electrical Equipment", the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of battery charging, in particular to a charging device and electrical equipment.

Background technique

With the popularization of new energy vehicles and new energy equipment, the heating problem of the battery during charging has also been closely watched, especially with the development of super fast charging technology, the heat generated during the charging process has increased sharply. Effective cooling will increase the risk of thermal runaway of the battery.

In devices that use batteries such as electric vehicles, the cooling capacity of the entire vehicle or new energy equipment comes from the maximum cooling capacity that the air conditioning system can provide. However, under the working condition of battery charging, especially super fast charging, the heat dissipation requirement of the battery is much greater than that under the normal charging operation condition. The thermal management system equipped with existing new energy vehicles or equipment can no longer fully meet the cooling requirements of the battery when it is charging, especially the working condition of super fast charging.

technical problem

In view of the technical problem that the battery in the prior art cannot fully meet the cooling requirements during charging, the purpose of this application is to provide a charging device and electrical equipment that can effectively meet the needs of the battery during charging, especially super fast charging. Conditional cooling requirements.

technical solution

The first aspect of the present application provides a charging device for a battery. The charging device includes an air cooling system, and the battery includes an air inlet valve and a first air outlet valve. The air cooling system blows gas into the battery through the inlet valve, and the battery discharges gas through the first outlet valve.

In an embodiment of the present application, the air cooling system includes an air generating module and an air duct. The wind generating module is used to generate the gas entering the battery. The gas generated by the wind generating module enters the battery through the air duct.

In an embodiment of the present application, the air cooling system further includes a temperature and humidity adjustment module. The temperature and humidity adjustment module is arranged in the inner cavity of the air duct, and the temperature and humidity adjustment module is used to adjust the temperature and humidity of the gas entering the battery.

In an embodiment of the present application, the temperature and humidity adjustment module includes a first filtering device, a cooling device and a heating device. The first filtering device is used for absorbing dust particles in the gas generated by the wind generating module. The cooling device is used to reduce the temperature of the gas generated by the wind generating module, thereby reducing the humidity of the gas. The heating device is used to increase the temperature of the gas whose temperature has been lowered by the cooling device. The first filtering device, the cooling device and the heating device can adjust the temperature and humidity of the fresh air entering the inside of the battery, so as to prevent the fresh air from corroding the battery or causing the battery to fail due to temperature difference.

In an embodiment of the present application, the cooling device is configured to work when the temperature of the gas generated by the wind generating module is greater than 0 degrees Celsius.

In an embodiment of the present application, the temperature and humidity adjustment module further includes a second filter device, the second filter device is arranged at one end of the air duct near the intake valve, and the second filter device is used to absorb dust in the gas passing through the air duct particles.

In an embodiment of the present application, the air-cooling system further includes a temperature detection device and a humidity detection device, the temperature detection device and the humidity detection device are arranged in the air duct for detecting the cleanliness and humidity of the gas processed by the temperature and humidity adjustment module. Whether the temperature and humidity meet the standards for entering the battery.

In an embodiment of the present application, the air duct includes a second air outlet valve, the second air outlet valve is arranged at one end of the air duct close to the intake valve, and the second air outlet valve is used to discharge the gas in the air duct that does not reach the standard for entering the inside of the battery .

In an embodiment of the present application, the second gas outlet valve is in an exhaust state when the cleanliness, temperature, and humidity of the gas do not reach the standard for entering the battery; The internal standard time is closed.

The second aspect of the present application provides an electric device. Electrical equipment includes batteries and air ducts. Wherein, the battery includes an air inlet valve and a first air outlet valve, the gas outside the battery enters the interior of the battery through the air duct through the air inlet valve, and the battery discharges gas through the first air outlet valve.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Beneficial effect

In this embodiment, on the basis of maintaining the original charging capacity of the charging device, an air cooling system is added to cool the inside of the battery while charging the battery, reducing the risk of thermal runaway of the battery.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

Fig. 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of cooperation between a charging device and a vehicle provided by some embodiments of the present application;

Fig. 3 is a schematic diagram of cooperation between a charging device provided in some embodiments of the present application and the internal structure of the vehicle;

Fig. 4 is a schematic structural diagram of another vehicle provided by some embodiments of the present application.

The reference numerals in the specific embodiment are as follows:

1 vehicle, 10 battery, 101 intake valve, 102 first outlet valve, 11 controller, 12 motor;

2 charging device, 20 air-cooling system, 21 wind-making module, 22 air duct, 221 second outlet valve, 23 temperature and humidity adjustment module, 231 first filter device, 232 cooling device, 233 heating device, 234 second filter device, 24 temperature detection device, 25 humidity detection device.

Embodiments of the present invention

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application shall have ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "diameter The orientation or positional relationship indicated by "to", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In addition, the technical terms "first", "second" and so on are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or integrated; it can also be a mechanical connection, it can also be an electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the description of the embodiments of the present application, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the second feature "on" or "under" the second feature. Indirect contact through intermediaries. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Existing new energy vehicles or equipment equipped with fast charging, especially super fast charging, will generate much more heat inside the battery than ordinary charging, which has a great impact on the safety performance of the battery, resulting in a huge safety hazard for the battery. The applicant found through research that an air-cooling system can be installed in the charging device, the battery can be provided with an intake valve and an exhaust valve, and the air-cooling system can be connected to the battery through an air duct. The fresh air generated by the air-cooling system enters the battery through the air duct and the intake valve. The fresh air exchanges heat with the battery inside the battery and is discharged from the battery through the exhaust valve, thereby taking away the heat inside the battery.

The present application provides a charging device and electric equipment. This charging device is suitable for any battery, such as battery modules and battery packs, or primary batteries and secondary batteries, such as secondary batteries including NiMH batteries, NiCd batteries, lead-acid (or lead storage) batteries, lithium-ion batteries , Na-ion batteries, polymer batteries, etc. This charging device is suitable for all kinds of electric equipment using batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include aircraft, rockets, Space shuttles and spacecraft, etc.; batteries are used to provide electrical energy for the above-mentioned electrical equipment.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described charging device and electric equipment, but also applicable to all charging devices and electric equipment using batteries. However, for the sake of brevity, the following The embodiments are described by taking an electric vehicle as an example.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1 provided by some embodiments of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1 is provided with a battery 10 , and the battery 10 may be provided at the bottom, head or tail of the vehicle 1 . The battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as an operating power source of the vehicle 1 . The vehicle 1 may further include a controller 11 and a motor 12 , the controller 11 is used to control the battery 10 to supply power to the motor 12 , for example, for starting, navigating, and working power requirements of the vehicle 1 during driving.

In some embodiments of the present application, the battery 10 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

Please refer to Figure 2 and Figure 3, Figure 2 is a schematic diagram of cooperation between a charging device 2 and a vehicle 1 provided in some embodiments of the present application, and Figure 3 is an interior of a charging device 2 and a vehicle 1 provided in some embodiments of the present application Schematic diagram of the fit of the structure. The first aspect of the present application provides a charging device 2 for a battery 10 . The charging device 2 includes an air cooling system 20 , and the battery 10 includes an air inlet valve 101 and a first air outlet valve 102 . The air cooling system 21 blows gas into the battery 10 through the inlet valve 101 , and the battery 10 discharges gas through the first outlet valve 102 .

The charging device 2 may include a charging pile (not shown in the figure). The air cooling system 20 is configured to provide gas for cooling the battery 10 . The air cooling system 20 can be integrated with the charging pile to reduce the footprint of the charging device 21 . The air-cooling system 20 can be independent from the charging pile, so as to ensure the working power of the air-cooling system 20 and the throughput efficiency of the air.

The air cooling system 20 can be an additional auxiliary cooling and heating solution. The air-cooling system 20 can not only cool the battery 10, but also preheat the battery 10, so as to prevent the battery 10 from rapidly heating up when charging in some extremely cold environments, causing the battery 10 to fail due to excessive temperature difference between the inside and outside. The air cooling system 20 can be coupled with the water cooling system and the air conditioning system of the battery 10. On the basis of maintaining the original cooling capacity of the battery 10, additional fresh air cooling capacity is added to cool the inside of the battery 10 and increase the heat dissipation inside the battery 10. ability.

The inlet valve 101 and the first outlet valve 102 can also be one-way valves with one-way flow in addition to the switch and close functions, so as to ensure that the air inside the battery 10 does not flow backward.

On the basis of maintaining the original charging capacity of the charging device 2 , adding an air cooling system 20 can cool the inside of the battery 10 while charging the battery 10 , reducing the risk of thermal runaway of the battery 10 .

Please refer to FIG. 3 , in an embodiment of the present application, the air cooling system 20 includes an air generating module 21 and an air duct 22 . The wind generating module 21 is used to generate gas entering the battery 10 . The gas generated by the wind generating module 21 enters the battery 10 through the air channel 22 .

The air-generating module 21 may adopt a refrigeration system of an air conditioner, including a compressor, a condenser, an evaporator, a vapor-liquid separator, an electronic expansion valve, and a blower. In order to heat up the air, the wind generating module 21 may also include a heater. The wind-generating module 21 can inhale air from the surrounding environment, and generate fresh air after processing, and then send the generated fresh air into the air duct 22 .

The air duct 22 may be a hollow pipe structure. One end of the air duct 22 communicates with the wind generating module 21 , and the other end communicates with the intake valve 101 . The material of the air duct 22 may be a flexible and elastic material, such as rubber. The air duct 22 can be integrated with the charging cable. A part of the air duct 22 can extend into the interior of the vehicle 1 and be connected to the battery 10 . The air duct 22 can also be completely exposed to the outside of the vehicle 1 and communicate with the exposed intake valve 101 of the battery 10 . A part of the air duct 22 may be exposed outside the vehicle 1 and connected to the charging pile, and another part may extend into the interior of the vehicle 1 and be connected to the battery 10 .

Please refer to FIG. 3 , in an embodiment of the present application, the air cooling system 20 further includes a temperature and humidity adjustment module 23 . The temperature and humidity adjustment module 23 is arranged in the inner cavity of the air duct 22 , and the temperature and humidity adjustment module 23 is used to adjust the temperature and humidity of the gas entering the battery 10 .

The gas blown by the air-cooling system 20 needs to exchange heat with the battery cells inside the battery 10. If the temperature of the gas is too low or too high, or the humidity of the gas is too high, the battery inside the battery 10 may be damaged. Single failure. Therefore, it is necessary to control the temperature and humidity of the gas entering the battery 10 .

Please refer to FIG. 3 , in an embodiment of the present application, the temperature and humidity adjustment module 23 includes a first filtering device 231 , a cooling device 232 and a heating device 233 . The first filtering device 231 is used for absorbing dust particles in the gas generated by the wind generating module 21 . The cooling device 232 is used to reduce the temperature of the gas generated by the wind generating module 21, thereby reducing the humidity of the gas. The heating device 233 is used to increase the temperature of the gas whose temperature has been lowered by the cooling device 232 .

The first filtering device 231 is disposed at the inlet of one end of the air duct 22 connected to the wind generating module 21 . The fresh air sucked by the wind-generating module 21 from the natural environment passes through the first filter device 231 to remove dust particles, which improves the cleanliness of the fresh air and prevents the dust particles from entering the battery 10 and causing the battery 10 to fail.

The function of the cooling device 232 is to reduce the temperature of the fresh air sucked in by the wind generating module 21 from the natural environment, and at the same time, dew the moisture in the air through the principle of cooling and dew condensation, so as to prevent the gas with high humidity from corroding the inside of the battery 10 . The cooling device 232 can be arranged before the first filtering device 231 , so that the fresh air sucked by the wind generating module 21 from the natural environment is first cooled and dehumidified by the cooling device 232 , and then the first filtering device 231 is used to remove dust particles. The cooling device 232 can also be installed after the first filtering device 231, so that the fresh air sucked by the wind-generating module 21 from the natural environment first passes through the first filtering device 231 to remove dust particles, and then passes through the cooling device 232 for cooling and dehumidification.

The heating device 233 is installed behind the cooling device 232, and heats the fresh air cooled and dehumidified by the cooling device 232 to an appropriate temperature range, so as to prevent the supercooled gas from entering the battery 10 and directly contacting the battery cells in a high temperature state, causing the battery 10 Failure occurred due to excessive temperature difference. The gas heated by the heating device 233 can also preheat the battery cells after entering the interior of the battery 10, so as to prevent the battery 10 from rapidly heating up when charging in some extremely cold environments, causing the battery 10 to fail due to excessive internal and external temperature differences.

The first filtering device 231 , cooling device 232 and heating device 233 can adjust the temperature and humidity of the fresh air entering the battery 10 to prevent the fresh air from corroding the battery or causing the battery 10 to fail due to temperature difference.

Referring to FIG. 3 , in an embodiment of the present application, the cooling device 232 is configured to work when the temperature of the gas generated by the wind generating module 21 is greater than 0 degrees Celsius.

The content of water vapor in the air is very low, and it is not necessary to cool and dehumidify through the cooling device 232 . After being filtered by the first filter device 231 , the fresh air below 0 degrees Celsius can be directly heated by the heating device 233 to a suitable temperature, and then directly flow into the air duct and enter the interior of the battery 10 .

Please refer to FIG. 3 , in an embodiment of the present application, the temperature and humidity adjustment module 23 also includes a second filter device 234, the second filter device 234 is arranged at one end of the air duct 22 close to the intake valve 101, and the second filter device 234 is used for absorbing dust particles in the gas passing through the air channel 10 .

Some dust particles may adhere to the inside of the air duct 10 , and the fresh air filtered by the first filtering device 231 may carry some particles into the interior of the battery 10 when passing through the interior of the air duct 10 . In this regard, a second filter device 234 may be provided in front of the inlet valve 11 to absorb dust particles and moisture that may be contained in the fresh air.

Please refer to Fig. 3, in an embodiment of the present application, the air cooling system 20 also includes a temperature detection device 24 and a humidity detection device 25, the temperature detection device 24 and the humidity detection device 25 are arranged in the air duct for detecting the temperature and humidity Whether the cleanliness, temperature, and humidity of the gas processed by the adjustment module 23 meet the standards for entering the interior of the battery 10 .

Please refer to FIG. 3 , in an embodiment of the present application, the air duct 22 includes a second air outlet valve 221, and the second air outlet valve 221 is arranged at one end of the air duct 22 close to the intake valve 101. The second air outlet valve 221 is used for The gas in the air duct 22 that does not reach the standard for entering the battery 10 is exhausted.

Please refer to Fig. 3, in one embodiment of the present application, the second gas outlet valve 221 is in the exhaust state when the cleanliness, temperature and humidity of the gas do not reach the standard for entering the inside of the battery 10; It is in a closed state when temperature, temperature, and humidity reach the standard for entering the inside of the battery 10.

The second air outlet valve 221 may be a one-way valve with one-way flow, which is only used to discharge air from the air duct 22 , and cannot inhale air from the outside into the air duct 22 .

Please refer to FIG. 3 , in some embodiments of the present application, the charging device 2 includes an air cooling system 20 , and the battery 10 includes an inlet valve 101 and a first outlet valve 102 . The air cooling system 20 includes an air generating module 21 , an air duct 22 , a temperature and humidity adjustment module 23 , a temperature detection device 24 and a humidity detection device 25 . The temperature and humidity adjustment module 23 includes a first filtering device 231 , a cooling device 232 , a heating device 233 and a second filtering device 234 . Wherein, the cooling device 232 is set to work when the temperature of the gas generated by the wind generating module 21 is greater than 0 degrees Celsius. The air duct 22 includes a second air outlet valve 221 . The inlet valve 101 , the first outlet valve 102 and the second outlet valve 221 are all one-way valves with one-way flow.

Please refer to FIG. 4 , which is a schematic structural diagram of another vehicle 1 provided by some embodiments of the present application. The second aspect of the present application provides an electric device. The electrical equipment may include a battery 10 and an air duct 22 . Wherein, the battery 10 includes an inlet valve 101 and a first outlet valve 102 , the gas outside the battery 10 enters the interior of the battery 10 through the air duct 22 through the inlet valve 101 , and the battery 10 discharges gas through the first outlet valve 102 .

Taking the vehicle 1 as the electric device as an example, as shown in FIG. 4 , the air duct 22 can be integrated into the vehicle 1 . The air duct 22 is connected to a fresh air device outside the vehicle, such as the charging device 1 with the wind generating module 21 .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A charging device for a battery, including an air cooling system, wherein the battery includes an inlet valve and a first outlet valve, and the air cooling system blows gas into the battery through the inlet valve, The battery discharges gas through the first gas outlet valve.
The charging device according to claim 1, wherein the air cooling system comprises:

a wind-generating module for generating gas entering the battery;

An air duct, through which the gas generated by the wind generating module enters the battery.
The charging device according to claim 2, wherein the air cooling system further comprises a temperature and humidity adjustment module, the temperature and humidity adjustment module is arranged in the inner cavity of the air duct, and the temperature and humidity adjustment module is used to adjust The temperature and humidity of the gas entering the battery.
The charging device according to claim 3, wherein the temperature and humidity adjustment module comprises:

a first filtering device, used to absorb dust particles in the gas generated by the wind-generating module;

a cooling device, configured to reduce the temperature of the gas generated by the wind-generating module, thereby reducing the humidity of the gas;

The heating device is used to increase the temperature of the gas whose temperature has been lowered by the cooling device.
The charging device according to claim 4, wherein the cooling device is configured to work when the temperature of the gas generated by the wind generating module is greater than 0 degrees Celsius.
The charging device according to any one of claims 3 to 5, wherein the temperature and humidity adjustment module further comprises a second filter device, the second filter device is arranged in the air duct close to the intake valve At one end, the second filtering device is used to absorb dust particles in the gas passing through the air channel.
The charging device according to any one of claims 3 to 6, wherein the air cooling system further comprises a temperature detection device and a humidity detection device, the temperature detection device and the humidity detection device are arranged in the air duct , used to detect whether the cleanliness, temperature and humidity of the gas processed by the temperature and humidity adjustment module meet the standards for entering the interior of the battery.
The charging device according to any one of claims 2 to 7, wherein the air channel includes a second air outlet valve, and the second air outlet valve is arranged at one end of the air channel close to the inlet valve, so The second gas outlet valve is used to discharge the gas in the air duct that does not reach the standard for entering the battery.
The charging device according to claim 8, wherein:

The second gas outlet valve is in an exhaust state when the cleanliness, temperature and humidity of the gas do not reach the standard for entering the interior of the battery;

The second gas outlet valve is in a closed state when the cleanliness, temperature and humidity of the gas meet the standards for entering the interior of the battery.
An electrical device, including a battery and an air duct, wherein the battery includes an air intake valve and a first air outlet valve, and gas outside the battery enters the interior of the battery through the air duct through the air intake valve , the battery discharges gas through the first gas outlet valve.