Power battery system and vehicle thereof

Abstract

The utility model relates to the technical field of vehicles, in particular to a power battery system and a vehicle thereof. The power battery system comprises a power battery; the motor is used for cooling a first loop of the motor; the second loop is used for cooling or heating the power battery; the heat preservation kettle is installed on the first loop and used for storing a motor cooling liquid medium, the third loop and the second loop are arranged in parallel, and part of the third loop is located in the heat preservation kettle and can exchange heat with the medium in the heat preservation kettle. Thus, the medium after the motor is cooled is stored through the heat preservation kettle, the power battery can be heated through heat exchange, the power battery is helped to be rapidly heated in a low-temperature environment, then the discharging capacity of the power battery is activated in time, and the vehicle using requirement of a user is met in time.

Description

Technical Field

[0001] The present application relates to the field of transportation technology, and in particular to a power battery system and a vehicle thereof. Background Art

[0002] The power battery system is mainly used as a vehicle-driven power system. In low-temperature environments, the power battery mainly relies on the PTC heating device in the battery thermal management device to heat the battery to activate the discharge capacity of the power battery. However, the heating of the PCT heating device takes a long time, and the PCT heating device requires the battery to discharge before it can work. If the power battery cannot be discharged, the operation of the PCT heating device will be limited. At this time, the discharge capacity of the power battery cannot be quickly activated, and the user's needs for timely use of the vehicle cannot be met. Utility Model Content

[0003] Based on this, it is necessary to provide a power battery system and a vehicle thereof that can quickly heat the power battery in a low temperature environment.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] A power battery system, comprising: a power battery; a motor; a first circuit for cooling the motor; a second circuit for cooling or heating the power battery; a thermos pot installed on the first circuit and used to store a medium after cooling the motor; a third circuit arranged in parallel with the second circuit, with part of the third circuit located in the thermos pot and capable of heat exchange with the medium in the thermos pot.

[0006] It can be understood that the present application provides a thermos pot to store the medium after cooling the motor, and heats the medium in the third circuit by exchanging heat between the medium in the thermos pot and the medium in the third circuit, and the medium in the third circuit can heat the power battery, thereby helping the power battery to heat up quickly in a low temperature environment, thereby promptly activating the discharge capacity of the power battery and promptly meeting the user's vehicle needs.

[0007] In one embodiment, the motor has a liquid inlet side and a liquid outlet side that are relatively arranged, and the medium in the first circuit flows from the liquid inlet side to the liquid outlet side and cools the motor; wherein the thermos pot is located on the liquid outlet side.

[0008] It can be understood that the liquid with a lower temperature flows into the motor from the liquid inlet side to cool the motor. The temperature of the medium after cooling the motor is higher, so that the medium with a higher temperature enters the thermos pot. In this way, the thermos pot can store a medium with a relatively high temperature, and the medium with a higher temperature exchanges heat with the medium in the third circuit, which can improve the heat exchange efficiency and enable the medium in the third circuit to quickly heat up to a relatively high temperature, thereby increasing the heating rate of the power battery.

[0009] In one embodiment, the third loop includes a circulation pipe and a heat exchange pipe. The circulation pipe is located outside the thermos pot and connected to the second loop. The heat exchange pipe is located inside the thermos pot and connected to the circulation pipe.

[0010] In one embodiment, the heat exchange tube is arranged in a spiral shape.

[0011] It can be understood that the spiral arrangement of the heat exchange tube can increase the heat exchange area of ​​the medium, thereby improving the heat exchange efficiency, and further allowing the medium in the third loop to be quickly heated to a relatively high temperature.

[0012] In one embodiment, the heat exchange tube is configured as a copper tube.

[0013] It is understandable that the copper tube has good heat transfer performance, so that the heat exchange effect between the medium in the thermos pot and the medium in the heat exchange tube is good and the heat exchange efficiency is high.

[0014] In one of the embodiments, a first valve is provided on the circulation pipe, and the first valve is used to open and close the circulation pipe.

[0015] It is understandable that, through the setting of the first valve, when the power battery does not need to be heated, the circulation pipe can be closed through the first valve, thereby preventing the medium in the heat exchange pipe from continuing to exchange heat with the medium in the thermos pot. That is, through the setting of the first valve, the temperature of the medium in the thermos pot can be preserved / locked as much as possible, thereby preparing for the subsequent heating of the power battery.

[0016] In one embodiment, the number of the first valves is two, and the two first valves are arranged at the end positions of both ends of the heat exchange tube.

[0017] It is understandable that the two first valves can close both ends of the heat exchange tube, and when the power battery does not need to be heated, the medium in the heat exchange tube can be prevented from flowing, thereby further preventing the medium in the heat exchange tube from flowing after heat exchange with the medium in the thermos pot. In other words, the two first valves can further lock the temperature of the medium in the thermos pot to prevent the loss of the medium temperature.

[0018] In one embodiment, the thermos pot is provided with a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are connected to the first circuit; wherein, both the liquid inlet and the liquid outlet are provided with a second valve, and the second valve is used to open and close the corresponding liquid inlet or the liquid outlet.

[0019] It can be understood that by setting the second valve, the corresponding liquid inlet and outlet can be closed, so that the thermos pot is completely in a closed state, thereby improving the insulation effect of the thermos pot and keeping the medium in the thermos pot at a higher temperature, providing efficient support for the subsequent heating of the power battery.

[0020] In one embodiment, the second circuit and the third circuit are connected via a three-way valve, and the three-way valve can control the opening or closing of the second circuit and the third circuit.

[0021] It can be understood that the three-way valve is used to control the opening or closing of the two circuits. When the third circuit is needed to heat the power battery, the second circuit can be closed through the three-way valve, and the third circuit is opened. This can increase the heating speed of the power battery and enable the power battery to activate its discharge capacity more quickly.

[0022] This application also provides the following technical solutions:

[0023] A power battery system, comprising: a power battery; a motor; a first circuit for cooling the motor; a thermos pot installed on the first circuit and used to store a medium after cooling the motor; a third circuit connected to the power battery, and part of the third circuit is located in the thermos pot and can perform heat exchange with the medium in the thermos pot.

[0024] It can be understood that by setting up a thermos pot, the medium after cooling the motor can be stored in the thermos pot, and the medium in the thermos pot can be heat-exchanged with the medium in the third circuit, thereby heating the medium in the third circuit, and the medium in the third circuit can heat the power battery, thus helping the power battery to heat up quickly, thereby promptly activating the discharge capacity of the power battery and promptly meeting the user's vehicle needs.

[0025] This application also provides the following technical solutions:

[0026] A vehicle comprises the power battery system described in any one of the above embodiments.

[0027] It is understandable that the above-mentioned power battery system is applied in the field of vehicle driving.

[0028] Compared with the prior art, the power battery system and the vehicle thereof are provided with a thermos pot to store the medium after cooling the motor, and heat the medium in the third circuit by exchanging heat between the medium in the thermos pot and the medium in the third circuit, and the medium in the third circuit can heat the power battery, thus helping the power battery to heat up quickly, thereby activating the discharge capacity of the power battery in time and meeting the user's vehicle needs in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of Example 1 of the power battery system structure provided in this application.

[0031] Figure 2 This is a schematic diagram of Example 2 of the power battery system structure provided in this application.

[0032] The reference numerals of the components are as follows:

[0033] 100. Power battery system; 10. Power battery; 20. Motor; 21. Liquid inlet side; 22. Liquid outlet side; 30. First circuit; 31. First circulation pump; 32. First thermal management module; 40. Second circuit; 41. Second circulation pump; 42. Second thermal management module; 50. Thermos pot; 51. Liquid inlet; 52. Liquid outlet; 511. Second valve; 60. Third circuit; 61. Circulation pipe; 62. Heat exchange pipe; 611. First valve; 70. Three-way valve. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a 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. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0039] See also Figure 1 and Figure 2 The present application provides a power battery system 100, which is applied to vehicles such as new energy vehicles, electric tricycles, and electric motorcycles, and is mainly used to provide power for the vehicle's travel.

[0040] Embodiment 1

[0041] Please continue to refer to Figure 1, the power battery system 100 includes a power battery 10, a motor 20, a thermos pot 50, a first circuit 30, a second circuit 40 and a third circuit 60. The power battery 10 is mainly used to store or provide electrical energy. The motor 20 is used as a driving part to drive the vehicle. The first circuit 30 is used to cool the motor 20, the second circuit 40 is used to cool or heat the power battery 10, the thermos pot 50 is installed on the first circuit 30, and is used to store the cooling medium after cooling the motor 20. The third circuit 60 is arranged in parallel with the second circuit 40, and part of the third circuit 60 is located in the thermos pot 50 and can exchange heat with the medium in the thermos pot 50. It should be explained that when the vehicle is started in a low temperature environment, the power battery 10 needs to be preheated to activate the discharge function of the power battery 10 and make the entire power battery 10 reach the best working state, but the preheating process takes some time, which cannot meet the user's demand for timely use of the car, and the energy consumption is high in this process. In the present application, the medium after cooling the motor 20 is stored in the thermos pot 50 and kept warm. In this way, when the power battery 10 needs to be preheated, the medium in the thermos pot 50 can be heat-exchanged with the medium in the third loop 60, thereby heating the medium in the third loop 60. The medium in the third loop 60 heats the power battery 10 through circulation, which helps the power battery 10 to heat up quickly, thereby activating the discharge capacity of the power battery 10 in time to meet the user's immediate car use needs. Here, the low temperature environment described in this application is generally an environment with a temperature below zero degrees Celsius, especially when the ambient temperature reaches minus 20 degrees or 30 degrees, that is, -20℃ or -30℃, the power battery 10 cannot discharge at all.

[0042] Furthermore, when the vehicle is running, the power battery 10 and the motor 20 are in normal working state. At this time, the motor 20 is cooled down through the first circuit 30, so that the temperature of the medium in the first circuit 30 will increase, and when passing through the thermos pot 50, part of the medium with higher temperature will be stored in the thermos pot 50, and will continue to be maintained at a certain temperature under the action of the thermos pot 50. When the vehicle stops running and starts next time, the medium in the thermos pot 50 can first be heat-exchanged with the medium in the third circuit 60, so that the medium in the third circuit 60 heats the power battery 10, so that it can quickly heat up in a low temperature environment, so as to achieve the purpose of timely activating the discharge capacity of the power battery 10. It can be understood that in this process, it is no longer necessary to use a PTC heating device, and the use restrictions of the PTC heating device are solved.

[0043] In one embodiment, please continue to refer to Figure 1, the motor 20 is installed in the first circuit 30, and the motor 20 has a liquid inlet side 21 and a liquid outlet side 22 that are relatively arranged. The medium in the first circuit 30 flows from the liquid inlet side 21 to the liquid outlet side 22, and cools the motor 20, and the thermos pot 50 is located at the liquid outlet side 22. It can be understood that when the vehicle is running, the medium with a lower temperature flows into the motor 20 from the liquid inlet side 21 and cools the motor 20. The temperature of the medium after cooling the motor 20 is higher, and the medium with a higher temperature enters the thermos pot 50. Thereby ensuring that the medium with a higher temperature is stored in the thermos pot 50. When it is necessary to heat the power battery 10, the medium with a relatively high temperature can be used to exchange heat with the medium in the third circuit 60 to improve the heat exchange efficiency, so that the medium in the third circuit 60 can be quickly heated to a relatively high temperature, thereby increasing the heating rate of the power battery 10.

[0044] Furthermore, the first loop 30 is also provided with a first circulation pump 31 and a first thermal management module 32. The first circulation pump 31 is used to keep the medium in the first loop 30 in a circulation state, so as to continuously flow through the motor 20 and cool the motor 20. The first thermal management module 32 is used to monitor the entire power battery system 100, and can automatically adjust the flow rate, flow rate, pressure and other targets of the liquid medium in the first loop 30 according to the corresponding algorithm that has been set, so as to achieve fast and reliable thermal management tasks.

[0045] like Figure 1 As shown, the thermos pot 50 can be made of a material with good heat preservation properties such as stainless steel. In this embodiment, the thermos pot 50 can keep warm for at least 12 hours in an environment of -30°C, and the temperature of the liquid medium in the thermos pot 50 does not drop by more than 5°C after this period of time. In this way, when a vehicle in a low temperature environment needs to be started, the medium in the thermos pot 50 can be heat-exchanged with the medium in the third loop 60 to heat the medium in the third loop 60. The medium in the third loop 60 heats the power battery 10 through circulation, helping the power battery 10 to heat up quickly, thereby promptly activating the discharge capacity of the power battery 10 and meeting the user's immediate vehicle needs.

[0046] Furthermore, the thermos pot 50 is provided with a liquid inlet 51 and a liquid outlet 52, both of which are connected to the first circuit 30; wherein the liquid inlet 51 and the liquid outlet 52 are both provided with a second valve 511, and the second valve 511 is used to open and close the corresponding liquid inlet 51 or the liquid outlet 52. It can be understood that by setting the second valve 511, the corresponding liquid inlet 51 and the liquid outlet 52 can be closed, so that the thermos pot 50 is completely in a closed state, improving the heat preservation effect of the thermos pot 50, and keeping the medium in the thermos pot 50 at a higher temperature, providing efficient support for the subsequent heating of the power battery 10.

[0047] Exemplarily, the second valve 511 may be an automatic control valve such as an electric valve or a solenoid valve, which may automatically control the opening and closing of the liquid inlet 51 and the liquid outlet 52 according to a vehicle control signal.

[0048] Continue to refer Figure 1 The second circuit 40 is also provided with a second circulation pump 41 and a second thermal management module 42. The second circulation pump 41 is used to keep the medium in the second circuit 30 in a circulation state, so that it continuously flows through the power battery 10 and increases the temperature of the power battery 10. The second thermal management module 42 is used to monitor the entire power battery system 100, and can automatically adjust the flow rate, flow rate, pressure and other targets of the liquid medium in the second circuit 40 according to the corresponding algorithm that has been set, so as to achieve fast and reliable thermal management tasks.

[0049] Please continue to refer to Figure 1 The third loop 60 includes a circulation pipe 61 and a heat exchange pipe 62 . The circulation pipe 61 is located outside the thermos pot 50 and connected to the second loop 40 . The heat exchange pipe 62 is located inside the thermos pot 50 and connected to the circulation pipe 61 .

[0050] Furthermore, the heat exchange tube 62 is arranged in a spiral shape. In this way, the heat exchange area of ​​the medium can be increased, thereby improving the heat exchange efficiency, so that during the heat exchange process, the medium in the third loop 60 can be quickly heated to a relatively high temperature. Of course, in other embodiments, the heat exchange tube 62 is also arranged in an arc shape, a loop shape, etc., as long as the heat exchange area of ​​the heat exchange tube 62 can be increased.

[0051] Preferably, the heat exchange tube 62 is made of a material with good heat transfer performance, such as a copper tube or an aluminum tube. In this embodiment, the heat exchange tube 62 is made of a copper tube, which has strong heat transfer performance, so that the heat exchange effect between the medium in the thermos 50 and the medium in the heat exchange tube is good and the heat exchange efficiency is high.

[0052] like Figure 1 As shown, the third circuit 60 further includes a first valve 611, which is used to open and close the circulation pipe 61. It is understandable that, through the setting of the first valve 611, when the power battery 10 does not need to be heated, the circulation pipe 61 can be closed by the first valve 611, thereby preventing the medium in the heat exchange pipe 62 from continuing to exchange heat with the medium in the thermos pot 50. That is, through the setting of the first valve 611, the temperature of the medium in the thermos pot 50 can be preserved / locked as much as possible, thereby preparing for the subsequent heating of the power battery 10.

[0053] Here, the first valve 611 may be an automatic control valve such as an electric valve or a solenoid valve, which may automatically control the opening / closing of the circulation pipe 61 according to a vehicle control signal.

[0054] Furthermore, two first valves 611 are provided, and the two first valves 611 are arranged at the end positions of both ends of the heat exchange tube 62. In this way, the two first valves 611 can close both ends of the heat exchange tube 62, and when the power battery 10 does not need to be heated, the medium in the heat exchange tube 62 can be prevented from flowing, thereby further avoiding the flow of the medium in the heat exchange tube 62 after heat exchange with the medium in the thermos pot 50. In other words, the temperature of the medium in the thermos pot 50 can be further locked by the two first valves 611 to avoid the loss of the medium temperature.

[0055] like Figure 1 As shown, the power battery system 100 further includes a three-way valve 70, the second circuit 40 and the third circuit 60 are connected by the three-way valve 70, and the three-way valve 70 can control the opening or closing of the second circuit 40 and the third circuit 60. Specifically, when the power battery 10 needs to be heated and heated through the third circuit 60, the second circuit 40 can be closed by the three-way valve 70, and the third circuit 60 can be opened. When the power battery 10 does not need to be heated and heated through the third circuit 60, the three-way valve 70 opens the second circuit 40 and closes the third circuit 60.

[0056] Here, the three-way valve 70 is configured as an electric three-way valve, which is connected to the vehicle status signal, so as to automatically open or close the corresponding second circuit 40 and the third circuit 60 according to the signal generated by different vehicle states.

[0057] For example, when the vehicle is in a low temperature environment and needs to be started, the electric three-way valve receives the signal, then closes the second circuit 40 and opens the third circuit 60. When the vehicle is in a normal driving state, the electric three-way valve receives the signal, then opens the second circuit 40 and closes the third circuit 60.

[0058] Embodiment 2

[0059] Please refer to Figure 2 , Figure 2 A schematic diagram of a second embodiment of the power battery system 100 is provided. The structure of the second embodiment is basically the same as that of the first embodiment, so please refer to the description of the first embodiment for the similarities. The difference is that the second circuit 40 in the first embodiment is not provided in the second embodiment.

[0060] Specifically, Figure 2As shown, the third circuit 60 in the second embodiment is connected to the power battery 10, and part of the third circuit 60 is located in the insulation pot 50, and can perform heat exchange with the medium in the insulation pot 50. That is, in this embodiment, the third circuit 60 is directly connected to the power battery 10, and the medium after cooling the motor 20 is stored in the insulation pot 50, and the medium in the insulation pot 50 is heat exchanged with the medium in the third circuit 60, so as to heat the medium in the third circuit 60, and the medium in the third circuit 60 can heat the power battery 10 after circulation, so as to help the power battery 10 quickly heat up in a low temperature environment, thereby timely activating the discharge capacity of the power battery 10 and timely meeting the user's vehicle use needs. Among them, the second circulation pump 41 is arranged in the third circuit 60, and the second circulation pump 41 is used to cause the medium on the third circuit 60 to be in a circulation state, so as to continuously flow through the power battery 10 and increase the temperature of the power battery 10. The second thermal management module 42 is also provided on the third loop 60. The second thermal management module 42 is used to monitor the entire power battery system 100. It can automatically adjust the flow rate, flow rate, pressure and other targets of the liquid medium on the third loop 60 according to the corresponding algorithm that has been set, so as to achieve fast and reliable thermal management tasks.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A power battery system, characterized in that: The power battery system comprises: Power battery (10); Motor (20); A first circuit (30) for cooling the motor (20); A second circuit (40) for cooling or heating the power battery (10); A thermos pot (50), mounted on the first circuit (30), and used for storing a medium after cooling the motor (20); The third circuit (60) is arranged in parallel with the second circuit (40), and part of the third circuit (60) is located in the thermos pot (50) and can perform heat exchange with the medium in the thermos pot (50).

2. The power battery system according to claim 1, characterized in that: The motor (20) has a liquid inlet side (21) and a liquid outlet side (22) arranged opposite to each other, and the medium in the first circuit (30) flows from the liquid inlet side (21) to the liquid outlet side (22) to cool the motor (20); wherein the thermos pot (50) is located on the liquid outlet side (22).

3. The power battery system according to claim 1, characterized in that: The third circuit (60) comprises a circulation pipe (61) and a heat exchange pipe (62); the circulation pipe (61) is located outside the thermos pot (50) and connected to the second circuit (40); the heat exchange pipe (62) is located inside the thermos pot (50) and connected to the circulation pipe (61).

4. The power battery system according to claim 3, characterized in that: The heat exchange tube (62) is arranged in a spiral shape.

5. The power battery system according to claim 3 or 4, characterized in that: The heat exchange tube (62) is configured as a copper tube.

6. The power battery system according to claim 3, characterized in that: The circulation pipe (61) is provided with a first valve (611), and the first valve (611) is used to open and close the circulation pipe (61).

7. The power battery system according to claim 6, characterized in that: The number of the first valves (611) is two, and the two first valves (611) are arranged at the end positions of both ends of the heat exchange tube (62).

8. The power battery system according to claim 1, characterized in that: The thermos pot (50) is provided with a liquid inlet (51) and a liquid outlet (52), and the liquid inlet (51) and the liquid outlet (52) are both connected to the first circuit (30); wherein the liquid inlet (51) and the liquid outlet (52) are both provided with a second valve (511), and the second valve (511) is used to open and close the corresponding liquid inlet (51) or the liquid outlet (52).

9. The power battery system according to claim 1, characterized in that: The second circuit (40) and the third circuit (60) are connected via a three-way valve (70), and the three-way valve (70) can control the opening or closing of the second circuit (40) and the third circuit (60).

10. A power battery system, characterized in that: The power battery system comprises: Power battery (10); Motor (20); A first circuit (30) for cooling the motor (20); A thermos pot (50), mounted on the first circuit (30), and used for storing a medium after cooling the motor (20); The third circuit (60) is connected to the power battery (10), and part of the third circuit (60) is located in the thermos pot (50) and can perform heat exchange with the medium in the thermos pot (50).

11. A vehicle, characterized in that: Comprising the power battery system according to claim 1 or 10.

Images