CN217719766U

CN217719766U - Power battery insulation structure

Info

Publication number: CN217719766U
Application number: CN202221961626.5U
Authority: CN
Inventors: 龚春忠; 袁粮森; 陈艾
Original assignee: Hozon New Energy Automobile Co Ltd
Current assignee: Hozon New Energy Automobile Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-01
Anticipated expiration: 2032-07-27

Abstract

The utility model relates to a power battery insulation construction. The power battery heat-insulating structure comprises a water tank, an electric heating device and a heat-insulating cover, wherein the electric heating device is used for heating fluid in the water tank; the water inlet pipeline and the water outlet pipeline are respectively communicated with the water tank and the power battery; controllable bypass valve, including temperature sensor and bypass valve, controllable bypass valve sets up outside the water tank and communicates with water intake pipe and outlet pipe way, and temperature sensor is arranged in detecting out at least that water pipe says fluidic temperature, and controllable bypass valve instructs electric heater unit execution heating according to the temperature that detects, and controllable bypass valve still communicates with thermal management system, receives thermal management system's switch command, and controllable bypass valve opens or closes the bypass valve according to switch command the utility model provides a power battery insulation construction can promote power battery's energy density under low temperature environment, effectively solves user's continuation of the journey anxiety problem in winter.

Description

Power battery insulation structure

Technical Field

The utility model relates to an automobile structure design and manufacturing technical field especially relate to a power battery insulation construction suitable for pure electric vehicles.

Background

The core energy storage system of the pure electric vehicle is a power battery. At present, the energy density of a power battery system is about 120 Wh/kg-250 Wh/kg, the stored energy is reduced by about 20% under the condition of low environmental temperature in winter, and the reduction ratios of different batteries are greatly different. The energy storage performance of the lithium iron phosphate battery is reduced more seriously in a low-temperature environment, so that the lithium iron phosphate battery is only suitable for being configured with a ternary lithium battery in a region with cold high-latitude weather, the general energy density of the whole pack is about 160Wh/kg, and the energy storage density under the low-temperature condition is about 130Wh/kg.

Under the environment that needs heating in winter, convert power battery's electric energy into heat energy, will lead to the vehicle duration to descend by a wide margin, arouse user's mileage anxiety. If the power battery distribution amount is increased, most users are difficult to accept due to the high cost of the power battery.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem of prior art, the utility model provides a power battery insulation construction can promote power battery's energy density under low temperature environment, effectively solves user's continuation of the journey anxiety problem in winter, and convenient to use and with low costs.

Specifically, the utility model provides a power battery insulation construction is applicable to pure electric vehicles, pure electric vehicles includes power battery, power battery insulation construction includes:

the water tank is provided with an electric heating device which is used for heating fluid in the water tank;

the water inlet pipeline and the water outlet pipeline are respectively communicated with the water tank and the power battery;

the controllable bypass valve comprises a temperature sensor and a bypass valve, the controllable bypass valve is arranged outside the water tank and is communicated with the water inlet pipeline and the water outlet pipeline, the temperature sensor is used for at least detecting the temperature of fluid in the water outlet pipeline, the controllable bypass valve instructs the electric heating device to perform heating according to the detected temperature, the controllable bypass valve is further communicated with the thermal management system and receives a switch instruction of the thermal management system, and the controllable bypass valve opens or closes the bypass valve according to the switch instruction.

According to the utility model discloses an embodiment, electric heater unit includes electric heating controller and electric heating wire, electric heating unit sets up on the controllable bypass valve, electric heating wire sets up in the water tank, electric heating controller respectively with electric heating wire and controllable bypass valve electricity are connected, electric heating controller receives and according to the control signal of controllable bypass valve controls electric heating wire carries out the heating.

According to the utility model discloses an embodiment, the electric heating controller inserts outside 220v alternating current power supply.

According to the utility model discloses an embodiment, the water tank sets up along its length direction level on the pure electric vehicles one side of water tank is equipped with the mount pad, electric heating wire sets up along the horizontal direction on the mount pad, electric heating wire has U type structure.

According to an embodiment of the present invention, a plurality of heat dissipation fins are provided on the electric heating wire, and the arrangement direction of the heat dissipation fins is perpendicular to the length direction of the electric heating wire.

According to the utility model discloses an embodiment, inlet channel and outlet pipe way pass through the mount pad inserts the water tank.

According to the utility model discloses an embodiment be equipped with the heat preservation casing outside the water tank.

According to an embodiment of the present invention, the heat insulating case is made of soft porcelain heat insulating material, aluminum silicate heat insulating material or phenolic foam material.

According to the utility model discloses an embodiment the periphery of heat preservation casing is equipped with shock-absorbing structure, the water tank passes through shock-absorbing structure with pure electric vehicles's inner structure laminating.

According to the utility model discloses an embodiment, shock-absorbing structure sets up the bottom of heat preservation casing.

The utility model provides a pair of power battery insulation construction adds the electrical heating water tank in pure electric vehicles, utilizes the hot-fluid as the energy storage medium, promotes the power battery temperature through circulation pipeline to can promote power battery's energy density under low temperature environment, effectively solve user's continuation of the journey anxiety problem winter, convenient to use and with low costs.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further explanation of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 shows a schematic diagram of a power battery thermal insulation structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the water tank of fig. 1.

FIG. 3 is a schematic diagram of the controllable bypass valve, water inlet line, water outlet line, and electric heating controller of FIG. 1.

Fig. 4 is a partial schematic view of the electrical heating apparatus of fig. 2.

Wherein the figures include the following reference numerals:

power battery insulation structure 100

Power battery 101

Water tank 102

Water inlet pipe 103

Water outlet pipeline 104

Controllable bypass valve 105

Electric heating controller 106

Electric heating wire 107

Mounting seat 108

Heat sink fins 109

Thermal insulation shell 110

Shock-absorbing structure 111

Circulating water pipe 112

Bypass line 113

Electric wire 114

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 shows a schematic diagram of a power battery thermal insulation structure according to an embodiment of the present invention. Fig. 2 is a schematic structural view of the water tank of fig. 1. FIG. 3 is a schematic diagram of the controllable bypass valve, water inlet line, water outlet line, and electric heating controller of FIG. 1. Fig. 4 is a partial schematic view of the electrical heating apparatus of fig. 2. As shown in fig. 1, the utility model provides a power battery 101 insulation system 100 suitable for pure electric vehicles. The pure electric vehicle comprises a thermal management system (not shown) and a power battery 101. The heat preservation structure 100 of the power battery 101 mainly comprises a water tank 102, a water inlet pipeline 103, a water outlet pipeline 104 and a controllable bypass valve 105.

Therein, referring to fig. 2, water tank 102 is disposed on a pure electric vehicle. The water tank 102 is provided with an electric heating device for heating the fluid in the water tank 102. It should be noted that the water tank 102 is not the water tank 102 used in the conventional vehicle design, and the water tank 102 is designed to store heat energy for keeping the power battery 101 warm. By way of example, and not limitation, the fluid within tank 102 may be water or other liquid.

One end of the water inlet pipeline 103 is communicated with the water tank 102, and the other end is communicated with the power battery 101. One end of the water outlet pipeline 104 is communicated with the water tank 102, and the other end is communicated with the power battery 101. The water inlet pipe 103 and the water outlet pipe 104 are respectively communicated with the water tank 102 and the power battery 101, so that a circulating water path from the water tank 102 to the power battery 101 is formed, and the fluid heated by the electric heating device can be conveyed to the power battery 101 through the water outlet pipe 104. The fluid after heat exchange on the power battery 101 side is returned to the water tank 102 via the water inlet line 103, thereby cyclically heating the power battery 101.

Referring to FIG. 3, the controllable bypass valve 105 includes a temperature sensor (not shown) and a bypass valve (not shown). A controllable bypass valve 105 is disposed outside the tank 102 and communicates with the inlet line 103 and the outlet line 104. A temperature sensor is used to detect at least the temperature of the fluid in the water line 104, and a controllable bypass valve 105 commands the electric heating means to perform heating on the basis of the detected temperature. It is easy to understand that the temperature sensor detects the temperature of the fluid, compares with the set temperature threshold, and if the temperature is less than the set temperature threshold, keeps the electric heating device continuously heating. And if the fluid temperature is not less than the set temperature threshold value, the electric heating device is instructed to stop heating. The controllable bypass valve 105 is also in communication with the thermal management system and receives a switch command from the thermal management system. The controllable bypass valve 105 opens or closes the bypass valve according to a switch command from the thermal management system. Specifically, the power battery 101 is continuously heated through the circulating water path, if the power battery 101 is heated to a set temperature threshold, the thermal management system may send a control command to the controllable bypass valve 105, open the bypass valve, so that the water tank 102, the bypass line 113 of the controllable bypass valve 105, the water inlet line 103, and the water outlet line 104 form a circulating water path, the fluid flowing out of the water tank 102 enters the water outlet line 104, and directly enters the water inlet line 103 through the bypass valve via the water outlet line 104, and the fluid flows back into the water tank 102. Otherwise, the bypass valve is closed, cutting off direct communication from the inlet line 103 and the outlet line 104.

Preferably, referring to fig. 3 and 4, the electric heating device includes an electric heating controller 106 and an electric heating wire 107. An electric heating device is arranged on the controllable bypass valve 105 and an electric heating wire 107 is arranged in the water tank 102. The electric heating controller 106 is electrically connected with the electric heating wire 107 and the controllable bypass valve 105, respectively. The electric heating controller 106 receives and controls the electric heating wire 107 to perform heating according to the control signal of the controllable bypass valve 105.

Preferably, the electrical heating controller 106 is connected to an external 220v ac power source via connection 114. When the fluid in tank 102 needs to be replenished with thermal energy, connection 114 is directed to an external 220v ac power source to heat electrical heating wire 107 and, thus, the fluid in tank 102.

Preferably, referring to fig. 2 and 3, water tank 102 is horizontally disposed on the pure electric vehicle along a length direction thereof, so as to form a relatively stable structure. A mounting seat 108 is provided at one side of the water tank 102, an electric heating wire 107 is horizontally provided on the mounting seat 108, and the electric heating wire 107 has a U-shaped structure.

Preferably, referring to fig. 4, a plurality of heat radiating fins 109 are provided on the electric heating wire 107. The arrangement direction of the radiator fins 109 is perpendicular to the length direction of the electric heating wire 107. Further, the plurality of heat dissipation fins 109 are uniformly spaced in the horizontal direction to obtain a larger contact surface with the fluid, so that the fluid can be uniformly heated.

Preferably, the water inlet line 103 and the water outlet line 104 are coupled to the tank 102 by a mounting base 108. A water circulation pipe 112 is also connected to the mounting seat 108, and the water circulation pipe 112 can be used as an extension of the water inlet pipe 103 or the water outlet pipe 104 in the water tank 102. If the circulating water pipe 112 is connected to the water outlet pipe 104, the heated fluid flows from the water tank 102 into the water outlet pipe 104 through the circulating water pipe 112, and the fluid after heat exchange with the power battery 101 returns to the water tank 102 through the water inlet pipe 103 and is continuously heated by the electric heating wire 107.

Preferably, referring to fig. 2, a thermal insulation case 110 is provided outside the water tank 102. An insulated housing 110 encloses the tank 102, the controllable bypass valve 105, the electric heating controller 106, and a portion of the water inlet line 103 and the water outlet line 104. The insulating case 110 can improve the insulating performance of the water tank 102. Furthermore, the heat preservation shell 110 is made of soft porcelain heat preservation materials, aluminum silicate heat preservation materials or phenolic foam materials, has better heat insulation reflection performance, and further improves the heat preservation performance of the water tank 102.

Preferably, a shock absorption structure 111 is arranged on the periphery of the heat preservation shell 110, and the water tank 102 is attached to the internal structure of the pure electric vehicle through the shock absorption structure 111. More preferably, the shock absorbing structure 111 is disposed at the bottom of the insulated housing 110 for supporting the water tank 102. Shock-absorbing structure 111 can adopt materials such as two-sided tape adhesive EVA, PE, CR, PU bubble cotton to make, has good shock attenuation effect and noise reduction.

The utility model provides a pair of power battery insulation construction, its energy storage process is from outside input electric energy, heats the fluid in the water tank through the electric energy. Typically, it is desirable to heat the fluid in the tank to a temperature above 90 ℃. In a low-temperature environment, when the temperature of the power battery needs to be raised, fluid in the water tank is introduced into the circulating pipeline to exchange heat with the power battery, so that the energy storage density of the power battery is raised.

According to practical tests, for a low-temperature environment below-5 ℃, a power battery is generally heated to be higher than 0 ℃, indoor heating is generally heated to be higher than 20 ℃, the specific heat capacity of water (fluid) is about 4.2X 103J/(kg DEG C), and the energy storage energy of the water tank is calculated to be 60kg x (100 ℃ -10 ℃) x 4.2X 103J/(kg DEG C) =6.3kWh by taking a capacity of 60L and reducing the temperature of 100 ℃ to 10 ℃ as an effective temperature difference. The net weight of the accessory equipment is about 20kg, the stored water is 60kg, and therefore the energy storage density is about 6.3 kWh/(20kg + 60kg) =78.8Wh/kg. The energy storage density of the ternary lithium battery is 60% in a low-temperature environment. The price of the whole heat preservation structure is about 500 yuan compared with a 60L water heater, which is equivalent to the energy storage cost of 80 yuan/kWh, and is far lower than the energy storage cost of 900 yuan/kWh of a lithium battery. In the energy supplementing process, the efficiency of converting electric energy into heat energy is high, and the loss mainly comprises the loss of a lead and the heat dissipation loss of a heat reservoir. Efficiency is up to more than 90%, the utility model discloses a power battery insulation construction is efficient for the scheme of power battery benefit ability than the electric energy through the rectification, and battery charging process is about 87% in addition battery internal resistance loss, rectification loss, actual efficiency.

To the oversize vehicle, increase insensitive haulage vehicle or bus to vehicle mass very much, can use the utility model discloses the scheme reduces winter and adopts hot energy storage cost. For the users for operation, the daily average driving mileage is higher than 300km, and the mileage anxiety under the low-temperature environment can be effectively relieved by additionally arranging the heat insulation structure. For non-operation users, users with daily mileage shorter than 100km can directly use the energy of the power battery for heating. For users with daily average mileage of 100 km-300 km, the heat insulation performance of the heat insulation structure of the power battery needs to be considered, and if the vehicle has better heat insulation performance under the condition of standing, the heat insulation structure of the power battery with different sizes can be additionally arranged according to the requirements in winter. To other seasons except winter, because need not to consider power battery's heat preservation, then can follow pure electric vehicles and demolish the utility model discloses a water tank, water inlet pipe and outlet pipe way among the power battery insulation construction can effectively reduce vehicle load.

The utility model provides a pair of power battery insulation construction has following advantage:

(1) The energy storage cost is low, and the heat preservation effect is good;

(2) The heating requirement of a user in a low-temperature environment can be met;

(3) The problem of mileage anxiety of a user in a low-temperature environment is solved;

(4) The energy is added into the electric energy, so that the environment is not polluted.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides a power battery insulation construction, is applicable to pure electric vehicles, pure electric vehicles includes thermal management system and power battery, its characterized in that, power battery insulation construction includes:

the controllable bypass valve comprises a temperature sensor and a bypass valve, the controllable bypass valve is arranged outside the water tank and is communicated with the water inlet pipeline and the water outlet pipeline, the temperature sensor is used for at least detecting the temperature of fluid in the water outlet pipeline, the controllable bypass valve instructs the electric heating device to perform heating according to the detected temperature, the controllable bypass valve is also communicated with the thermal management system and receives a switch instruction of the thermal management system, and the controllable bypass valve opens or closes the bypass valve according to the switch instruction.

2. The power battery thermal insulation structure according to claim 1, wherein the electric heating device comprises an electric heating controller and an electric heating wire, the electric heating device is disposed on the controllable bypass valve, the electric heating wire is disposed in the water tank, the electric heating controller is respectively electrically connected with the electric heating wire and the controllable bypass valve, and the electric heating controller receives and controls the electric heating wire to perform heating according to a control signal of the controllable bypass valve.

3. The power battery insulation structure of claim 2, wherein the electric heating controller is connected to an external 220v alternating current power supply.

4. The thermal insulation structure for the power battery according to claim 2, wherein the water tank is horizontally arranged on the pure electric vehicle along the length direction of the water tank, a mounting seat is arranged on one side of the water tank, the electric heating wire is horizontally arranged on the mounting seat, and the electric heating wire has a U-shaped structure.

5. The thermal insulation structure for the power battery according to claim 4, wherein a plurality of heat dissipation fins are provided on the electric heating wire, and the arrangement direction of the heat dissipation fins is perpendicular to the length direction of the electric heating wire.

6. The power battery thermal insulation structure of claim 5, wherein the water inlet pipeline and the water outlet pipeline are connected into the water tank through the mounting seat.

7. The power battery heat preservation structure of claim 1, characterized in that a heat preservation shell is arranged outside the water tank.

8. The power battery thermal insulation structure of claim 7, wherein the thermal insulation shell is made of soft porcelain thermal insulation material, aluminum silicate thermal insulation material or phenolic foam material.

9. The power battery heat preservation structure of claim 7, wherein a shock absorption structure is arranged on the periphery of the heat preservation shell, and the water tank is attached to the internal structure of the pure electric vehicle through the shock absorption structure.

10. The power battery thermal insulation structure according to claim 9, wherein the shock absorption structure is arranged at the bottom of the thermal insulation casing.