Battery temperature control assembly, temperature-controllable battery system and vehicle

Abstract

The utility model provides a battery temperature control assembly, a temperature-controllable battery system and a vehicle. The battery temperature control assembly is used for adjusting the temperature of a battery pack and at least comprises a liquid heat exchange unit and a gas heat exchange unit, and the liquid heat exchange unit is attached to the battery pack and configured to exchange heat with the battery pack; the gas heat exchange unit is provided with a gas channel which exchanges heat with the liquid heat exchange unit, the gas channel is provided with a gas inlet and a gas outlet, and gas in the gas channel is configured to flow from the gas inlet to the gas outlet and at least cools the liquid heat exchange unit. The battery temperature control assembly disclosed by the utility model can utilize the gas heat exchange unit to assist the liquid heat exchange unit for cooling on the premise of not changing the internal structure of the battery pack and keeping the whole structure of the battery pack sealed, so that the cooling efficiency and the cooling speed of the battery pack can be effectively improved, and the energy consumption in the cooling process of the battery pack can be effectively reduced; therefore, the cruising ability of the battery pack is effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power batteries, and in particular to a battery temperature control assembly. The present disclosure also relates to a temperature controllable battery system and a vehicle. Background Art

[0002] In the context of the country's advocacy of green travel, electric vehicles are regarded as the mainstream mode of travel in the future. Electric vehicles are equipped with battery packs that can store electrical energy. The battery packs can provide energy for the motor to drive the electric vehicle to move.

[0003] The power batteries of existing electric vehicles are generally composed of lithium batteries connected in series or parallel to form high-power, large-capacity battery packs. According to the heat generation mechanism of the battery, the battery pack will generate a large amount of heat during the high-current charging and discharging process. When the battery heat dissipation is poor, a large amount of heat will accumulate inside the battery, which will not only lead to poor battery temperature consistency and different battery cell life, and then cause the power battery capacity and life to decay; it will also cause the battery pack to thermally run away due to the sharp rise in the internal temperature of the power battery, and even cause the battery pack to spontaneously combust, endangering the personal safety of the user. Therefore, electric vehicles are often equipped with devices for heat dissipation and cooling of the power battery.

[0004] At present, in existing electric vehicles, most battery packs use air cooling or liquid cooling. Air cooling uses air as a heat transfer medium, and directly allows the wind generated by air movement to pass through the battery pack to achieve the purpose of cooling. However, air cooling generally has a poor effect, and has high requirements for air duct design and battery structure arrangement. It is difficult to ensure the temperature consistency of each battery in the battery pack, especially for batteries close to the air outlet. It is difficult to dissipate heat and it is difficult to achieve an ideal heat dissipation effect.

[0005] Liquid cooling is a method of removing heat by flowing liquid through the battery pack. Although the heat dissipation effect is good, it consumes a large amount of battery energy, which greatly reduces the endurance of electric vehicles.

[0006] In view of the above shortcomings and deficiencies, it is necessary to design a new battery cooling structure. Utility Model Content

[0007] In view of this, the present disclosure provides a battery temperature control assembly. The present disclosure also provides a temperature controllable battery system and a vehicle.

[0008] According to a first aspect of an embodiment of the present disclosure, a battery temperature control assembly is provided, which is used to adjust the temperature of a battery pack, including:

[0009] a liquid heat exchange unit, the liquid heat exchange unit being attached to the battery pack and configured to exchange heat with the battery pack;

[0010] A gas heat exchange unit, wherein the gas heat exchange unit is provided with a gas channel for exchanging heat with the liquid heat exchange unit, the gas channel is provided with an air inlet and an air outlet, the gas in the gas channel is configured to flow from the air inlet to the air outlet and at least cool the liquid heat exchange unit.

[0011] In one embodiment of the present disclosure, a liquid temperature control unit is further included. A liquid passage is provided in the liquid heat exchange unit. The liquid temperature control unit and the liquid passage form a liquid loop and are configured to cool and / or heat the liquid flowing therethrough.

[0012] In one embodiment of the present disclosure, it also includes a temperature sensor and a control unit, wherein the temperature sensor is configured to obtain the temperature of the battery pack; the control unit is configured to control the liquid temperature control unit to heat or cool the temperature control liquid flowing through the battery pack based on the temperature of the battery pack.

[0013] In one embodiment of the present disclosure, the air inlet is located on the front side of the gas channel, and the air outlet is located on the rear side of the gas channel, and the gas in the gas channel is constructed to flow naturally from the air inlet to the air outlet during the movement of the battery pack to cool the liquid heat exchange unit.

[0014] In one embodiment of the present disclosure, a switching component is further included, and the switching component is configured to control the gas channel to communicate with the outside to form an open gas passage, or to control the gas channel to be closed.

[0015] In one embodiment of the present disclosure, the control unit is configured to control the gas channel to be connected to the outside to form an open gas passage when the liquid temperature control unit is cooled, and to control the gas channel to be closed when the liquid temperature control unit is heated.

[0016] In one embodiment of the present disclosure, the control unit is configured to control the gas channel to be connected to the outside to form an open gas passage when the temperature of the battery pack is higher than a first temperature threshold, and to control the gas channel to be closed when the temperature of the battery pack is lower than the first temperature threshold.

[0017] In one embodiment of the present disclosure, the gas heat exchange unit includes a gas temperature control unit, and the gas temperature control unit is configured to cool the gas to flow through the gas channel.

[0018] In one embodiment of the present disclosure, the gas temperature control unit is configured to heat the gas to flow through the gas channel.

[0019] In one embodiment of the present disclosure, a switching component is further included, which is constructed to control the gas channel to form a gas passage with the gas temperature control unit, or to control the gas channel to communicate with the outside to form an open gas passage, or to control the gas channel to be closed.

[0020] In one embodiment of the present disclosure, the control unit is configured as follows:

[0021] When the liquid temperature control unit is cooling and the temperature of the battery pack is higher than a second temperature threshold, controlling the gas channel and the gas temperature control unit to form a gas passage, and controlling the gas temperature control unit to cool the gas to be passed through the gas channel;

[0022] When the liquid temperature control unit is cooled and the temperature of the battery pack is lower than a second temperature threshold, the gas passage is controlled to be connected to the outside to form an open gas passage.

[0023] In one embodiment of the present disclosure, the control unit is further configured to control the gas channel and the gas temperature control unit to form a gas passage when the liquid temperature control unit is heated and the temperature of the battery pack is lower than a third temperature threshold, and control the gas temperature control unit to heat the gas to be passed through the gas channel;

[0024] When the liquid temperature control unit is heated and the temperature of the battery pack is higher than a third temperature threshold, the gas channel is controlled to be closed.

[0025] In one embodiment of the present disclosure, a fan unit is further included, and the fan unit is configured to increase the flow speed of the gas in the gas channel.

[0026] In one embodiment of the present disclosure, the liquid heat exchange unit is in a plate shape and is attached to the bottom of the battery pack;

[0027] The gas heat exchange unit includes an enclosure plate, which is arranged below the liquid heat exchange unit, and the gas channel is arranged between the enclosure plate and the liquid heat exchange unit.

[0028] In one embodiment of the present disclosure, the liquid heat exchange unit includes an upper plate and a lower plate, the upper plate is in the shape of a horizontal plate to fit the bottom of the battery pack, and the lower plate is constructed to partially protrude downward to form the liquid passage with the upper plate.

[0029] In one embodiment of the present disclosure, the downwardly protruding portion of the lower plate body is constructed to form a gap with the enclosure plate to form the gas passage that is connected as a whole.

[0030] In one embodiment of the present disclosure, at least two air inlets are provided, and each of the air inlets is horizontally arranged on the first side of the gas channel; at least two air outlets are provided, and each of the air outlets is horizontally arranged on the second side of the gas channel.

[0031] In one embodiment of the present disclosure, the liquid passage in the liquid heat exchange unit is configured to be arranged in a folded manner from the first side to the second side.

[0032] According to a second aspect of an embodiment of the present disclosure, there is provided a temperature-controllable battery system, comprising a battery pack and the battery temperature control assembly.

[0033] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising a battery pack and the battery temperature control assembly, or the temperature-controllable battery system.

[0034] The present disclosure provides a battery temperature control component, which is used to adjust the temperature of a battery pack. Specifically, the battery temperature control component includes a liquid heat exchange unit and a gas heat exchange unit. The liquid heat exchange unit is attached to the battery pack and is configured to exchange heat with the battery pack; the gas heat exchange unit is provided with a gas channel for exchanging heat with the liquid heat exchange unit, and the gas channel is provided with an air inlet and an air outlet. The gas in the gas channel is configured to flow from the air inlet to the air outlet and at least cool the liquid heat exchange unit.

[0035] During the use of the battery temperature control assembly disclosed in the present invention, when the battery pack needs to be cooled, the liquid heat exchange unit is attached to the battery pack, and the liquid in the liquid heat exchange unit can exchange heat with the battery pack after being cooled, thereby taking away the heat of the battery pack; and in the process of the gas in the gas heat exchange unit flowing from the air inlet along the gas channel to the air outlet, the liquid heat exchange unit can be cooled, driving part of the heat on the liquid heat exchange unit. When the battery pack needs to be heated, the liquid heat exchange unit is attached to the battery pack, and the liquid in the liquid heat exchange unit can exchange heat with the battery pack after being heated, thereby heating the battery.

[0036] The battery temperature control assembly disclosed in the present invention can not only realize the cooling and heating functions of the battery pack, but also compared with the existing battery temperature control assemblies, the battery temperature control assembly disclosed in the present invention can, without changing the internal structure of the battery pack and keeping the overall structure of the battery pack sealed, use a gas heat exchange unit to assist the liquid heat exchange unit for cooling, thereby effectively improving the cooling efficiency and cooling speed of the battery pack, and can also effectively reduce the energy consumption during the cooling process of the battery pack, thereby effectively improving the battery life of the battery pack, enhancing product competitiveness, and also bringing users a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a three-dimensional diagram of a battery temperature control assembly provided by an embodiment of the present disclosure;

[0038] Figure 2 is a logic diagram of a battery temperature control component provided by an embodiment of the present disclosure;

[0039] Figure 3 is a cross-sectional structural diagram of a battery temperature control assembly provided in an embodiment of the present disclosure;

[0040] Figure 4 is an internal structure diagram of a battery temperature control assembly provided by an embodiment of the present disclosure;

[0041] Figure 5 This is another internal structure diagram of the battery temperature control assembly provided in an embodiment of the present disclosure.

[0042] Figures 1 to 5 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0043] 10. Battery pack; 21. Liquid heat exchange unit; 211. Liquid passage; 212. Upper plate; 213. Lower plate; 22. Liquid temperature control unit; 23. Delivery pump; 31. Gas heat exchange unit; 311. Gas passage; 312. Air inlet; 313. Air outlet; 314. Enclosure; 32. Gas temperature control unit; 33. Switching assembly; 34. Fan unit; 41. Temperature sensor; 42. Control unit. DETAILED DESCRIPTION

[0044] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present disclosure. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values.

[0045] Many specific details are set forth in the following description to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present disclosure, so the present disclosure is not limited to the specific implementation disclosed below. Techniques, methods, and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be considered as part of the specification.

[0046] The terms used in one or more embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present disclosure. The singular forms of "a", "said" and "the" used in one or more embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present disclosure refers to and includes any or all possible combinations of one or more associated listed items.

[0047] It should be understood that, although the terms first, second, etc. may be used to describe various information in one or more embodiments of the present disclosure, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present disclosure, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determination". In this article, "upper", "lower", "front", "back", "left", "right", etc. are only used to indicate the relative position relationship between the relevant parts, rather than to limit the absolute position of these relevant parts. In this article, "equal", "same", etc. are not strictly mathematical and / or geometrical limitations, but also include errors that can be understood by those skilled in the art and allowed by manufacturing or use. Unless otherwise specified, the numerical range herein includes not only the entire range within its two endpoints, but also includes several sub-ranges contained therein.

[0048] In the field of batteries, batteries can be divided into two categories, namely, disposable batteries and rechargeable batteries, depending on whether they are rechargeable or not. Disposable batteries cannot be recharged and can only be discarded after they are exhausted. Rechargeable batteries, also known as secondary batteries or storage batteries, are made of materials and processes that are completely different from disposable batteries. The biggest advantage of this type of battery is that it can be recycled many times after being charged, and its output current load capacity is usually higher than that of most disposable batteries.

[0049] At present, the common rechargeable batteries on the market are mainly lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Among them, lithium-ion batteries stand out for their advantages such as light weight, large capacity (its capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect and low self-discharge rate. Although the price is slightly higher, it is still widely used. In addition, lithium-ion batteries are also commonly used in pure electric vehicles and hybrid vehicles. Although their capacity is relatively low, they have large output and charging current, and also have a long service life.

[0050] The batteries involved in the embodiments of the present disclosure mainly refer to rechargeable batteries, and the following will mainly use lithium-ion batteries as an example to illustrate the concept of the present disclosure. It is worth noting that any other suitable rechargeable batteries are also applicable. The battery mentioned in the embodiments of the present disclosure refers to a single physical module that includes one or more battery cells and provides higher voltage and capacity. For example, the battery mentioned here may include a battery module or a battery pack. The battery cell includes a positive electrode plate, a negative electrode plate, an electrolyte and a separator, which is the basic unit that makes up the battery module and battery pack.

[0051] According to the different packaging methods, battery cells are mainly divided into three types: cylindrical, square and soft pack. Lithium-ion battery cells rely on the movement of lithium ions between the positive and negative electrodes to work, and the embedded lithium compounds are the key electrode materials. At present, the commonly used positive electrode materials of lithium-ion batteries include lithium iron phosphate and ternary lithium.

[0052] In practical applications, multiple battery cells can be connected in series or in parallel through electrode terminals to meet the needs of different occasions. In high-power applications such as electric vehicles, the use of batteries is usually divided into three levels: battery cells, battery modules and battery packs. The battery module is a structure obtained by electrically connecting a certain number of battery cells and placing them in a frame in order to protect the battery cells from external impact, heat and vibration. The battery pack is the final form of the battery system of an electric vehicle, which usually includes a battery module and control and protection systems such as a battery management system and thermal management components. With the advancement of technology, the battery module level may gradually be omitted, and the battery pack may be directly composed of cells, thereby increasing the energy density of the battery system and reducing the number of components.

[0053] The battery pack in the embodiments of the present disclosure is not only applicable to electrical devices such as vehicles, ships and aircraft, but can also be used in various electronic devices such as mobile phones, tablets, laptops, electric toys, electric tools, battery vehicles, etc. To simplify the description, the following embodiments will mainly be described by taking the example of the battery pack, but the battery technology of the present disclosure is also applicable to all devices using batteries.

[0054] The present disclosure provides a battery temperature control component, which is used to adjust the temperature of a battery pack. Specifically, the battery temperature control component includes a liquid heat exchange unit and a gas heat exchange unit. The liquid heat exchange unit is attached to the battery pack and is configured to exchange heat with the battery pack; the gas heat exchange unit is provided with a gas channel for exchanging heat with the liquid heat exchange unit, and the gas channel is provided with an air inlet and an air outlet. The gas in the gas channel is configured to flow from the air inlet to the air outlet and at least cool the liquid heat exchange unit. It is understandable that the above-mentioned battery pack may include the above-mentioned battery module or battery pack, and may also include other battery structures, which are not limited here.

[0055] During the use of the battery temperature control assembly disclosed in the present invention, when the battery pack needs to be cooled, the liquid heat exchange unit is attached to the battery pack, and the liquid in the liquid heat exchange unit can exchange heat with the battery pack after being cooled, thereby taking away the heat of the battery pack; and in the process of the gas in the gas heat exchange unit flowing from the air inlet along the gas channel to the air outlet, the liquid heat exchange unit can be cooled, driving part of the heat on the liquid heat exchange unit. When the battery pack needs to be heated, the liquid heat exchange unit is attached to the battery pack, and the liquid in the liquid heat exchange unit can exchange heat with the battery pack after being heated, thereby heating the battery.

[0056] The battery temperature control assembly disclosed in the present invention can not only realize the cooling and heating functions of the battery pack, but also compared with the existing battery temperature control assemblies, the battery temperature control assembly disclosed in the present invention can, without changing the internal structure of the battery pack and keeping the overall structure of the battery pack sealed, use a gas heat exchange unit to assist the liquid heat exchange unit for cooling, thereby effectively improving the cooling efficiency and cooling speed of the battery pack, and can also effectively reduce the energy consumption during the cooling process of the battery pack, thereby effectively improving the battery life of the battery pack, enhancing product competitiveness, and also bringing users a better user experience.

[0057] For ease of understanding, refer to Figures 1 to 5 , the specific structure and working principle of the battery temperature control assembly of the present disclosure are described in detail in combination with an embodiment. It should be noted that the present disclosure also provides a temperature-controllable battery system and vehicle, which are introduced together with the battery temperature control assembly in order to keep the text concise.

[0058] like Figure 1 and Figure 2 As shown, the present disclosure provides a battery temperature control assembly, which is used to adjust the temperature of a battery pack 10. The battery pack 10 may include the battery module or battery pack, or other battery structures, which are not limited here.

[0059] Specifically, the battery temperature control assembly includes a liquid heat exchange unit 21 and a gas heat exchange unit 31 .

[0060] like Figure 3As shown, the liquid heat exchange unit 21 is attached to the battery pack 10 and is configured to exchange heat with the battery pack 10. Specifically, in one embodiment of the present disclosure, the battery temperature control assembly of the present disclosure also includes a liquid temperature control unit 22, and a liquid passage 211 is provided in the liquid heat exchange unit 21. The liquid temperature control unit 22 and the liquid passage 211 form a liquid loop, and are configured to cool and / or heat the liquid flowing through. That is, during the operation of the liquid heat exchange unit 21, the liquid temperature control unit 22 and the liquid passage 211 form a liquid loop, and the delivery pump 23 in the liquid loop can deliver liquid to flow in the liquid loop, and the liquid temperature control unit 22 can cool and / or heat the liquid flowing through. When the temperature of the liquid in the liquid heat exchange unit 21 is lower than the temperature of the battery pack 10, it can take away the heat of the battery to achieve cooling of the battery pack 10. When the temperature of the liquid in the liquid heat exchange unit 21 is higher than the temperature of the battery pack 10, the liquid heat can be transferred to the battery to achieve heating of the battery pack 10.

[0061] It is understandable that the liquid temperature control unit 22 can use two different devices to cool or heat the liquid flowing through, or a single device can be used to cool and heat the liquid flowing through at the same time, and the specific structure is not limited here. The liquid temperature control unit 22 can use the phase change principle to cool or heat the liquid flowing through, or other principles such as heat transfer to cool or heat the liquid flowing through, and the specific principle is not limited here.

[0062] like Figure 3 and Figure 4 As shown, the gas heat exchange unit 31 is provided with a gas channel 311 for heat exchange with the liquid heat exchange unit 21, and the gas channel 311 is provided with an air inlet 312 and an air outlet 313. The gas in the gas channel 311 is configured to flow from the air inlet 312 to the air outlet 313, and at least cool the liquid heat exchange unit 21. It can be understood that cooling the liquid heat exchange unit 21 not only includes cooling the liquid in the liquid passage 211 in the liquid heat exchange unit 21, but also includes cooling the plate body and the tube body surrounding the liquid passage 211. In order to achieve cooling of the liquid heat exchange unit 21, the gas temperature in the gas channel 311 is lower than the temperature of the liquid heat exchange unit 21.

[0063] During the use of the battery temperature control assembly of the present disclosure, when the battery pack 10 needs to be cooled, the liquid heat exchange unit 21 is attached to the battery pack 10, and the liquid in the liquid heat exchange unit 21 can exchange heat with the battery pack 10 after being cooled, thereby taking away the heat of the battery pack 10; and in the process of the gas in the gas heat exchange unit 31 flowing from the air inlet 312 along the gas channel 311 to the air outlet 313, the liquid heat exchange unit 21 can be cooled, and part of the heat on the liquid heat exchange unit 21 can be driven. When the battery pack 10 needs to be heated, the liquid heat exchange unit 21 is attached to the battery pack 10, and the liquid in the liquid heat exchange unit 21 can exchange heat with the battery pack 10 after being heated, thereby heating the battery.

[0064] The battery temperature control component disclosed in the present invention can not only realize the cooling and heating functions of the battery pack 10, but also compared with the existing battery temperature control components, the battery temperature control component disclosed in the present invention can utilize the gas heat exchange unit 31 to assist the liquid heat exchange unit 21 for cooling without changing the internal structure of the battery pack 10 and keeping the overall structure of the battery pack 10 sealed, thereby effectively improving the cooling efficiency and cooling speed of the battery pack 10, and can also effectively reduce the energy consumption of the battery pack 10 during the cooling process, thereby effectively improving the battery life of the battery pack 10, enhancing product competitiveness, and also bringing users a better user experience.

[0065] like Figure 3 As shown, the liquid heat exchange unit 21 is plate-shaped and attached to the bottom of the battery pack 10. Since the battery pack 10 has anisotropic thermal conductivity, in common square hard-shell batteries, the thermal conductivity in the direction parallel to the stack is much greater than that in the direction perpendicular to the stack, so the efficiency of cooling the battery pack 10 from the bottom is much higher than the efficiency of cooling the battery pack 10 from the side.

[0066] Therefore, if Figure 3 As shown, in one embodiment of the present disclosure, the gas heat exchange unit 31 includes a panel 314, which is disposed below the liquid heat exchange unit 21, and a gas channel 311 is disposed between the panel 314 and the liquid heat exchange unit 21. In this way, after the battery temperature control assembly of the present disclosure is applied to the vehicle, the liquid heat exchange unit 21 is disposed at the bottom of the battery pack 10, and the gas channel 311 is disposed at the bottom of the liquid heat exchange unit 21, which not only has a high cooling efficiency, but also has a more reasonable overall layout, occupies less space, and the liquid heat exchange unit 21 and the panel 314 can also play the role of a protective plate to a certain extent, effectively protecting the safety of the battery pack 10 and preventing the battery pack 10 from leaking due to collision.

[0067] Among them, Figure 3As shown, since the gas channel 311 is directly enclosed by the enclosing plate 314 and the liquid heat exchange unit 21, and since the gas channel 311 is enclosed between the enclosing plate 314 and the liquid heat exchange unit 21, the gas in the gas channel 311 can directly contact and exchange heat with the liquid heat exchange unit 21, thereby effectively improving the heat exchange efficiency between the gas heat exchange unit 31 and the liquid heat exchange unit 21. In another embodiment of the present disclosure, the gas channel 311 can also be provided in the gas heat exchange unit 31, and the gas heat exchange unit 31 and the liquid heat exchange unit 21 are fitted together, thereby achieving heat exchange between the gas heat exchange unit 31 and the liquid heat exchange unit 21.

[0068] Specifically, Figure 3 As shown, in one embodiment of the present disclosure, the liquid heat exchange unit 21 includes an upper plate 212 and a lower plate 213, the upper plate 212 is in the shape of a horizontal plate to fit the bottom of the battery pack 10, and the lower plate 213 is constructed to partially protrude downward to form a liquid passage 211 with the upper plate 212. Since the upper plate 212 of the liquid heat exchange unit 21 is in the shape of a horizontal plate, the contact area between the liquid heat exchange unit 21 and the battery pack 10 can be effectively increased, thereby improving the cooling and heating efficiency between the liquid heat exchange unit 21 and the battery pack 10. During the processing of the lower plate 213, by making the lower plate 213 partially protrude downward, the liquid passage 211 can be formed with the upper plate 212; and although the lower plate 213 protrudes downward, it will not affect the formation of the gas passage 311 with the enclosure 314.

[0069] Further, such as Figure 3 As shown, in one embodiment of the present disclosure, the downwardly protruding portion of the lower plate 213 is constructed to form a gap with the enclosure 314 to form an integrally connected gas channel 311. Since a gap is formed between the lower plate 213 and the enclosure 314 to form an integrally connected gas channel 311, the gas entering from each air inlet 312 can flow in the integrally connected gas channel 311 and then flow out from each air outlet 313. Compared with a plurality of independent gas channels 311, the integrally connected gas channel 311 can effectively increase the cross-sectional area under the premise of a certain volume, thereby increasing the gas flow rate in the gas channel 311, thereby improving the heat exchange efficiency between the gas heat exchange unit 31 and the liquid heat exchange unit 21.

[0070] like Figure 3 and Figure 4As shown, in one embodiment of the present disclosure, at least two air inlets 312 are provided, and each air inlet 312 is arranged in the horizontal direction on the first side of the gas channel 311; at least two air outlets 313 are provided, and each air outlet 313 is arranged in the horizontal direction on the second side of the gas channel 311. By providing at least two air inlets 312 on the first side of the gas channel 311 and at least two air outlets 313 on the second side of the gas channel 311, the resistance of gas entering the air inlet 312 and flowing out of the air inlet 312 can be effectively reduced without affecting the overall layout, and the air intake volume in the gas channel 311 is increased, thereby improving the heat exchange efficiency between the gas heat exchange unit 31 and the liquid heat exchange unit 21.

[0071] like Figure 5 As shown, in one embodiment of the present disclosure, the liquid passage 211 in the liquid heat exchange unit 21 is configured to be arranged in a folded manner from the first side to the second side. Since the liquid passage 211 in the liquid heat exchange unit 21 is arranged in a folded manner from the first side to the second side, the liquid in the gas channel 311 flows from the gas inlet 312 located on the first side to the gas outlet 313 located on the second side, so that the heat exchange efficiency between the gas heat exchange unit 31 and the liquid heat exchange unit 21 can be further improved.

[0072] Specifically, in one embodiment of the present disclosure, the battery temperature control assembly of the present disclosure further includes a temperature sensor 41 and a control unit 42, wherein the temperature sensor 41 is configured to obtain the temperature of the battery pack 10; and the control unit 42 is configured to control the liquid temperature control unit 22 to heat or cool the temperature control liquid flowing through the battery pack 10 based on the temperature of the battery pack 10. That is, during the operation of the battery temperature control assembly of the present disclosure, the temperature sensor 41 obtains the temperature of the battery pack 10 in real time; when the temperature is high and meets the cooling condition, the control unit 42 controls the liquid temperature control unit 22 to cool the liquid flowing through, thereby cooling the battery pack 10; when the temperature is low and meets the heating condition, the control unit 42 controls the liquid temperature control unit 22 to heat the liquid flowing through, thereby heating the battery pack 10.

[0073] The specific form of the gas heat exchange unit 31 of the present disclosure may also have a variety of structures. For example, in one embodiment of the present disclosure, the air inlet 312 is located at the front side of the gas channel 311, and the air outlet 313 is located at the rear side of the gas channel 311. The gas in the gas channel 311 is configured to flow naturally from the air inlet 312 to the air outlet 313 during the movement of the battery pack 10 to cool the liquid heat exchange unit 21.

[0074] That is, in this embodiment, the gas heat exchange unit 31 adopts a passive heat exchange method. After the battery temperature control assembly disclosed in the present invention is applied to the vehicle, the air inlet 312 is located on the front side and the air outlet 313 is located on the rear side. During the driving of the vehicle, the outside air naturally flows from the air inlet 312 to the air outlet 313, and cools the liquid heat exchange unit 21 in the gas channel 311. In this way, the gas heat exchange unit 31 does not need to consume electricity during operation, further reducing the energy consumption of the battery pack 10 during the cooling process, and effectively improving the endurance of the battery pack 10.

[0075] Among them, Figure 2 As shown, in order to adapt to various working conditions, in one embodiment of the present disclosure, the gas heat exchange unit 31 of the present disclosure further includes a switching component 33, and the switching component 33 is configured to control the gas channel 311 to communicate with the outside to form an open gas passage, or to control the gas channel 311 to be closed. Therefore, the gas heat exchange unit 31 of the present disclosure can control the switching component 33 to switch the working state of the gas heat exchange unit 31 according to the working conditions. When the gas heat exchange unit 31 is required to assist the liquid heat exchange unit 21 in cooling, the gas channel 311 can be controlled to communicate with the outside to form an open gas passage. During the driving of the vehicle, the outside air naturally flows from the air inlet 312 to the air outlet 313, and cools the liquid heat exchange unit 21 in the gas channel 311; and when the gas heat exchange unit 31 is not required to assist the liquid heat exchange unit 21 in cooling, the gas channel 311 can be controlled to be closed. In this way, during the driving of the vehicle, the outside air cannot enter the gas channel 311, so that the temperature of the liquid heat exchange unit 21 can be effectively maintained.

[0076] Specifically, in one embodiment of the present disclosure, the control unit 42 is configured to control the gas channel 311 to be connected to the outside to form an open gas passage when the liquid temperature control unit 22 is cooled, and to control the gas channel 311 to be closed when the liquid temperature control unit 22 is heated.

[0077] Therefore, when the liquid temperature control unit 22 cools the liquid flowing through so that the liquid heat exchange unit 21 can cool the battery pack 10, the control unit 42 can control the gas channel 311 to communicate with the outside to form an open gas channel, thereby using the gas heat exchange unit 31 to assist the liquid heat exchange unit 21 in cooling, thereby improving the cooling efficiency of the battery pack 10. When the liquid temperature control unit 22 is heating, the gas channel 311 can be controlled to be closed, so that during the driving of the vehicle, the outside air cannot enter the gas channel 311, thereby effectively maintaining the temperature of the liquid heat exchange unit 21 and ensuring that the liquid heat exchange unit 21 continues to heat the battery pack 10.

[0078] In another embodiment of the present disclosure, the control unit 42 is configured to control the gas channel 311 to communicate with the outside world to form an open gas channel when the temperature of the battery pack 10 is higher than the first temperature threshold, and to control the gas channel 311 to be closed when the temperature of the battery pack 10 is lower than the first temperature threshold. That is, when the temperature of the battery pack 10 is high, but there is no need for the liquid temperature control unit 22 to cool the liquid flowing through it, and only the liquid delivered by the delivery pump 23 to flow in the liquid circuit can take away the excess heat of the battery pack 10, the control unit 42 can control the gas channel 311 to communicate with the outside world to form an open gas channel, and use the gas heat exchange unit 31 to assist the liquid heat exchange unit 21 in cooling, thereby improving the cooling efficiency of the battery pack 10. When the temperature of the battery pack 10 is low, the gas channel 311 can be controlled to be closed in time, and during the driving of the vehicle, the outside air cannot enter the gas channel 311, thereby preventing the battery pack 10 from being too low in temperature.

[0079] It can be understood that, in one embodiment of the present disclosure, the gas heat exchange unit 31 of the present disclosure includes a gas temperature control unit 32 , and the gas temperature control unit 32 is configured to cool the gas to flow through the gas channel 311 .

[0080] That is, in this embodiment, the gas heat exchange unit 31 adopts an active heat exchange method, and the gas temperature control unit 32 first cools the gas to be passed through the gas channel 311, and then the cooled gas exchanges heat with the liquid heat exchange unit 21 during the process of passing through the gas channel 311, thereby cooling the liquid heat exchange unit 21. Compared with passive heat exchange, active heat exchange can effectively improve the heat exchange efficiency of the gas heat exchange unit 31, thereby improving the cooling efficiency in extremely hot conditions, further avoiding overheating of the battery pack 10, and ensuring the safety of the battery pack 10.

[0081] Furthermore, the gas temperature control unit 32 is configured to heat the gas to be flowed through the gas channel 311. In this way, when the battery pack 10 needs to be heated, the gas temperature control unit 32 can heat the gas to be flowed through the gas channel 311, and then the heated gas can exchange heat with the liquid heat exchange unit 21 during the process of flowing through the gas channel 311, thereby realizing auxiliary heating of the liquid heat exchange unit 21. In this way, the heating efficiency in extreme cold conditions can be effectively improved, ensuring that the battery pack 10 can work normally and extending the battery life of the battery pack 10.

[0082] It is understandable that for the gas temperature control unit 32 that can perform cooling and heating at the same time, a single device can be used to achieve both cooling and heating functions, or two different devices can be used to achieve both cooling and heating functions respectively. Moreover, the gas temperature control unit 32 can form a closed loop with the gas channel 311, or it can form an open passage with the gas channel 311. It is understandable that in the case where the gas temperature control unit 32 and the gas channel 311 form an open passage, the gas temperature control unit 32 needs to be arranged on the front side of the gas path of the air inlet 312.

[0083] Similarly, in one embodiment of the present disclosure, the gas heat exchange unit 31 of the present disclosure further includes a switching component 33, and the switching component 33 is configured to control the gas channel 311 and the gas temperature control unit 32 to form a gas passage, or control the gas channel 311 to communicate with the outside to form an open gas passage, or control the gas channel 311 to be closed. In this way, the gas heat exchange unit 31 of the present disclosure can be switched between passive heat exchange, active heat exchange and closed states as needed, and can be switched to passive heat exchange to reduce energy consumption, and can be switched to active heat exchange to improve efficiency, and can also close the gas channel 311 to maintain the temperature of the liquid heat exchange unit 21, thereby meeting various needs.

[0084] Specifically, in one embodiment of the present disclosure, the control unit 42 is configured as follows:

[0085] When the liquid temperature control unit 22 is cooling and the temperature of the battery pack 10 is higher than the second temperature threshold, the gas channel 311 is controlled to form a gas passage with the gas temperature control unit 32, and the gas temperature control unit 32 is controlled to cool the gas to be passed through the gas channel 311;

[0086] When the liquid temperature control unit 22 is cooling and the temperature of the battery pack 10 is lower than the second temperature threshold, the control gas passage 311 is connected to the outside to form an open gas passage.

[0087] That is, in extremely hot conditions, the control unit 42 can control the gas heat exchange unit 31 to switch to an active heat exchange state, that is, control the gas channel 311 and the gas temperature control unit 32 to form a gas passage, and control the gas temperature control unit 32 to cool the gas to be passed through the gas channel 311, thereby effectively improving the cooling efficiency in extremely hot conditions, further avoiding overheating of the battery pack 10, and ensuring the safety of the battery pack 10. When the battery temperature is high but the gas temperature control unit 32 is not required to work, the control unit 42 can control the gas heat exchange unit 31 to switch to a passive heat exchange state, that is, control the gas channel 311 to communicate with the outside to form an open gas passage, and use the outside air to assist the liquid heat exchange unit 21 in cooling, which can also improve the cooling efficiency of the battery pack 10 without consuming energy.

[0088] Similarly, in one embodiment of the present disclosure, the control unit 42 is also configured to control the gas channel 311 and the gas temperature control unit 32 to form a gas passage when the liquid temperature control unit 22 is heated and the temperature of the battery pack 10 is lower than the third temperature threshold, and control the gas temperature control unit 32 to heat the gas flowing through the gas channel 311; when the liquid temperature control unit 22 is heated and the temperature of the battery pack 10 is higher than the third temperature threshold, control the gas channel 311 to be closed.

[0089] That is, in extreme cold conditions, the control unit 42 can control the gas heat exchange unit 31 to switch to an active heat exchange state, that is, control the gas channel 311 and the gas temperature control unit 32 to form a gas passage, and control the gas temperature control unit 32 to heat the gas flowing through the gas channel 311, thereby effectively improving the heating efficiency in extreme cold conditions, ensuring that the battery pack 10 can work normally, and extending the battery life of the battery pack 10. When the battery temperature is high but the gas temperature control unit 32 does not need to work, the control unit 42 can control the gas heat exchange unit 31 and the gas channel 311 to close, so that during the driving of the vehicle, the outside air cannot enter the gas channel 311, thereby effectively maintaining the temperature of the liquid heat exchange unit 21, ensuring that the liquid heat exchange unit 21 continues to heat the battery pack 10.

[0090] Specifically, in one embodiment of the present disclosure, the battery temperature control assembly of the present disclosure further includes a fan unit 34, and the fan unit 34 is configured to accelerate the flow speed of the gas in the gas channel 311. By accelerating the flow speed of the gas in the gas channel 311, the heat exchange efficiency between the gas heat exchange unit 31 and the liquid heat exchange unit 21 can be effectively improved.

[0091] The present disclosure also provides a temperature-controllable battery system, which includes a battery pack 10 and the above-mentioned temperature-controllable battery system. The temperature-controllable battery system of the present disclosure can not only realize the cooling and heating functions of the battery pack 10, but also, compared with the existing temperature-controllable battery system, the temperature-controllable battery system of the present disclosure can use the gas heat exchange unit 31 to assist the liquid heat exchange unit 21 for cooling without changing the internal structure of the battery pack 10 and keeping the overall structure of the battery pack 10 sealed, thereby effectively improving the cooling efficiency and cooling speed of the battery pack 10, and can also effectively reduce the energy consumption of the battery pack 10 during the cooling process, thereby effectively improving the endurance of the battery pack 10, enhancing product competitiveness, and also bringing users a better use experience.

[0092] The present disclosure also provides a vehicle, which includes a battery pack 10 and the above-mentioned battery temperature control component, or the above-mentioned temperature controllable battery system. The vehicle of the present disclosure can not only realize the cooling and heating functions of the battery pack 10, but also, compared with the existing vehicles, the vehicle of the present disclosure can use the gas heat exchange unit 31 to assist the liquid heat exchange unit 21 in cooling without changing the internal structure of the battery pack 10 and keeping the overall structure of the battery pack 10 sealed, thereby effectively improving the cooling efficiency and cooling speed of the battery pack 10, and effectively reducing the energy consumption during the cooling process of the battery pack 10, thereby effectively improving the endurance of the vehicle.

[0093] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery temperature control assembly, used to adjust the temperature of a battery pack (10), characterized in that: include: a liquid heat exchange unit (21), the liquid heat exchange unit (21) being attached to the battery pack (10) and configured to perform heat exchange with the battery pack (10); A gas heat exchange unit (31), wherein the gas heat exchange unit (31) is provided with a gas channel (311) for exchanging heat with the liquid heat exchange unit (21), wherein the gas channel (311) is provided with an air inlet (312) and an air outlet (313), and the gas in the gas channel (311) is configured to flow from the air inlet (312) to the air outlet (313) and to cool at least the liquid heat exchange unit (21).

2. The battery temperature control assembly according to claim 1, characterized in that: It also includes a liquid temperature control unit (22), wherein a liquid passage (211) is provided in the liquid heat exchange unit (21), and the liquid temperature control unit (22) and the liquid passage (211) form a liquid circuit and are configured to cool and / or heat the liquid flowing through.

3. The battery temperature control assembly according to claim 2, characterized in that: The invention also includes a temperature sensor (41) and a control unit (42), wherein the temperature sensor (41) is configured to obtain the temperature of the battery pack (10); and the control unit (42) is configured to control the liquid temperature control unit (22) to heat or cool the temperature control liquid flowing through the liquid based on the temperature of the battery pack (10).

4. The battery temperature control assembly according to claim 3, characterized in that: The air inlet (312) is located at the front side of the gas channel (311), and the air outlet (313) is located at the rear side of the gas channel (311). The gas in the gas channel (311) is configured to flow naturally from the air inlet (312) to the air outlet (313) during the movement of the battery pack (10) to cool the liquid heat exchange unit (21).

5. The battery temperature control assembly according to claim 4, characterized in that: It also includes a switching component (33), wherein the switching component (33) is configured to control the gas channel (311) to communicate with the outside to form an open gas passage, or to control the gas channel (311) to be closed.

6. The battery temperature control assembly according to claim 5, characterized in that: The control unit (42) is configured to control the gas passage (311) to communicate with the outside to form an open gas passage when the liquid temperature control unit (22) is cooling, and to control the gas passage (311) to be closed when the liquid temperature control unit (22) is heating.

7. The battery temperature control assembly according to claim 5, characterized in that: The control unit (42) is configured to control the gas channel (311) to communicate with the outside to form an open gas passage when the temperature of the battery pack (10) is higher than a first temperature threshold, and to control the gas channel (311) to be closed when the temperature of the battery pack (10) is lower than the first temperature threshold.

8. The battery temperature control assembly according to claim 3, characterized in that: The gas heat exchange unit (31) comprises a gas temperature control unit (32), and the gas temperature control unit (32) is configured to cool the gas to be passed through the gas channel (311).

9. The battery temperature control assembly according to claim 8, characterized in that: The gas temperature control unit (32) is configured to heat the gas to flow through the gas channel (311).

10. The battery temperature control assembly according to claim 9, characterized in that: It also includes a switching component (33), which is configured to control the gas channel (311) and the gas temperature control unit (32) to form a gas passage, or to control the gas channel (311) to communicate with the outside to form an open gas passage, or to control the gas channel (311) to be closed.

11. The battery temperature control assembly according to claim 10, characterized in that: The control unit (42) is configured to: When the liquid temperature control unit (22) is cooling and the temperature of the battery pack (10) is higher than a second temperature threshold, the gas channel (311) and the gas temperature control unit (32) are controlled to form a gas passage, and the gas temperature control unit (32) is controlled to cool the gas to be passed through the gas channel (311); When the liquid temperature control unit (22) is cooled and the temperature of the battery pack (10) is lower than a second temperature threshold, the gas passage (311) is controlled to communicate with the outside to form an open gas passage.

12. The battery temperature control assembly according to claim 10, characterized in that: The control unit (42) is further configured to control the gas channel (311) and the gas temperature control unit (32) to form a gas passage when the liquid temperature control unit (22) is heated and the temperature of the battery pack (10) is lower than a third temperature threshold, and to control the gas temperature control unit (32) to heat the gas to be passed through the gas channel (311); When the liquid temperature control unit (22) is heated and the temperature of the battery pack (10) is higher than a third temperature threshold, the gas channel (311) is controlled to be closed.

13. The battery temperature control assembly according to any one of claims 1 to 12, characterized in that: The invention also comprises a fan unit (34), wherein the fan unit (34) is configured to increase the flow speed of the gas in the gas channel (311).

14. The battery temperature control assembly according to any one of claims 2 to 12, characterized in that: The liquid heat exchange unit (21) is plate-shaped and adheres to the bottom of the battery pack (10); The gas heat exchange unit (31) comprises a surrounding plate (314), the surrounding plate (314) is arranged below the liquid heat exchange unit (21), and the gas channel (311) is arranged between the surrounding plate (314) and the liquid heat exchange unit (21).

15. The battery temperature control assembly according to claim 14, characterized in that: The liquid heat exchange unit (21) comprises an upper plate (212) and a lower plate (213); the upper plate (212) is in the shape of a horizontal plate so as to fit the bottom of the battery pack (10); and the lower plate (213) is constructed to partially protrude downward so as to enclose the liquid passage (211) together with the upper plate (212).

16. The battery temperature control assembly according to claim 15, characterized in that: The downwardly protruding portion of the lower plate body (213) is configured to form a gap with the enclosure plate (314) to form the gas passage (311) which is in integral communication.

17. The battery temperature control assembly according to any one of claims 2 to 12, characterized in that: At least two air inlets (312) are provided, and each of the air inlets (312) is arranged on a first side of the gas channel (311) along a horizontal direction; at least two air outlets (313) are provided, and each of the air outlets (313) is arranged on a second side of the gas channel (311) along a horizontal direction.

18. The battery temperature control assembly according to claim 17, characterized in that: The liquid passage (211) in the liquid heat exchange unit (21) is configured to be arranged in a folded manner from the first side to the second side.

19. A temperature-controllable battery system, characterized in that: It comprises a battery pack (10) and a battery temperature control assembly according to any one of claims 1 to 18.

20. A vehicle, characterized in that: The vehicle comprises a battery pack (10) and a battery temperature control assembly according to any one of claims 1 to 18, or a temperature-controllable battery system according to claim 19.

Images