Integrated protection device, battery pack and vehicle

Abstract

The invention provides an integrated protection device, a battery pack and a vehicle, and relates to the field of battery pack structures. The liquid cooling part, the heat insulation part and the protection part are sequentially arranged in the first direction, and heat dissipation and cooling of the battery pack can be achieved through the liquid cooling part; the heat exchange rate of cold liquid, hot liquid and air outside the battery pack can be slowed down through the heat insulation part, so that the heat preservation effect of the battery pack is improved; the technical effects of buffering, energy absorption, collision prevention and bumping prevention can be achieved through the protection part and the multiple elastic pieces. Namely, the integrated protection device can integrate the functions of heat dissipation, heat preservation, bottom protection, impact resistance, shock absorption and the like, and compared with an existing battery pack which needs an independent liquid cooling device, a protection device and a shock absorption device (the technical effects can be achieved), the space occupied by the protection device in the battery pack is obviously reduced, and the service life of the battery pack is prolonged. And the space utilization rate of the battery pack is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of battery pack structures, and in particular to an integrated protective device, a battery pack and a vehicle. Background Art

[0002] Battery cells generate a large amount of heat during operation. If this heat cannot be discharged in a timely manner, the temperature inside the battery will continue to rise, causing the internal temperature difference to gradually increase, affecting the battery's service life. Existing batteries generally use liquid cooling to dissipate heat, using flowing cooling water to continuously absorb the heat generated by the battery. However, existing solutions generally use a pipe structure to inject and remove cooling water. The pipes occupy a large amount of space inside the battery pack, reducing the battery pack's space utilization, hindering the improvement of energy density, and greatly increasing the difficulty of leak detection and repair operations, resulting in inefficient equipment maintenance.

[0003] In addition, in order to ensure the safe use of the battery pack, the battery pack is usually also equipped with independent protective devices (such as bottom guard plates) and shock-absorbing devices, both of which will also occupy the available space inside the battery pack. Summary of the Invention In view of this, the purpose of the present application is to provide an integrated protective device, a battery pack and a vehicle to solve the problem that the space utilization inside the existing battery pack is low and affects the energy density of the battery pack.

[0004] According to the above-mentioned purpose, the first aspect of the present invention provides an integrated protective device, wherein the integrated protective device includes a liquid cooling part, a heat insulation part and a protective part arranged in sequence along a first direction, the liquid cooling part and the protective part are correspondingly connected to limit the heat insulation part, and the heat insulation part and the protective part are also connected with multiple elastic parts.

[0005] Preferably, the liquid cooling portion includes a first liquid cooling plate and a second liquid cooling plate sequentially arranged along the first direction; A first flow channel is formed on the bottom of the first liquid cooling plate facing the second liquid cooling plate, and a second flow channel is formed on the top of the second liquid cooling plate facing the first liquid cooling plate.

[0006] Preferably, the first liquid cooling plate and the second liquid cooling plate are both formed as stamping parts; when the first liquid cooling plate and the second liquid cooling plate are correspondingly welded, the first flow channel and the second flow channel are correspondingly matched to form a liquid cooling flow channel, and the coolant can circulate in the liquid cooling flow channel.

[0007] Preferably, the protection portion is formed with a plurality of placement grooves, and the placement grooves correspond to the elastic members one by one.

[0008] Preferably, the heat insulating portion is formed with a plurality of limiting through holes, and the limiting through holes correspond to the elastic members one-to-one; the elastic members can be limited by the placement grooves and the limiting through holes.

[0009] Preferably, the heat insulating portion is formed as a resin fiber member.

[0010] Preferably, the elastic member is formed as a disc spring.

[0011] Preferably, a gap is formed at the connection between the liquid cooling part and the protection part.

[0012] According to a second aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the integrated protection device as described above.

[0013] According to a third aspect of the present invention, a vehicle is provided, wherein the vehicle includes the battery pack described above.

[0014] According to the integrated protective device, battery pack, and vehicle of the present invention, the liquid cooling portion, the heat insulating portion, and the protective portion are sequentially arranged along a first direction, so that the protective device forms an integrated structure similar to a "three-layer sandwich". The liquid cooling portion can achieve heat dissipation and cooling of the battery pack; the heat insulating portion can slow down the heat exchange rate between the cold liquid, the hot liquid, and the air outside the battery pack, thereby improving the thermal insulation effect of the battery pack; and the protective portion and the multiple elastic members can achieve the technical effects of buffering, energy absorption, and collision and anti-collision. In other words, the integrated protective device can integrate the functions of heat dissipation, heat preservation, bottom protection, and impact and shock absorption. Compared with the existing battery pack that requires separate liquid cooling devices, protective devices, and shock absorbing devices (to achieve the above technical effects), the space occupied by the protective device in the battery pack is significantly reduced, effectively improving the space utilization rate of the battery pack, thereby effectively increasing the energy density. In addition, the integrated structure of the protective device can greatly reduce the difficulty of leak detection and repair operations, effectively improving the maintenance efficiency of the equipment.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 11 is a partial exploded schematic diagram of an integrated protection device according to an embodiment of the present invention.

[0018] Icons: 11-second liquid cooling plate; 110-second flow channel; 2-insulation part; 21-limiting through hole; 3-protective part; 31-placement groove; 4-elastic part. DETAILED DESCRIPTION The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0019] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0020] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements present between them.

[0021] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0022] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0023] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientations of "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0024] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0025] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0026] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0027] According to a first aspect of the present invention, there is provided an integrated protection device, such as Figure 1As shown, the integrated protective device in this embodiment includes a liquid cooling portion, a heat insulating portion 2, and a protective portion 3, arranged sequentially along a first direction (i.e., the direction indicated by the arrow in the figure). Furthermore, the protective device is provided with multiple elastic members 4, thereby integrating the functions of heat dissipation and cooling, thermal insulation, and shock absorption and protection. Specifically, the protective device alone in a battery pack can achieve heat dissipation and cooling, thermal insulation, and shock absorption and protection for the battery pack, effectively improving the space utilization of the battery pack. The specific structure, connection relationship, and positional relationship of the aforementioned components of the integrated protective device according to the present invention will be described in detail below.

[0028] In this embodiment, if Figure 1 As shown, the liquid cooling unit includes a first liquid cooling plate and a second liquid cooling plate 11 arranged sequentially along a first direction. The first liquid cooling plate and the second liquid cooling plate 11 are both formed as stamped parts, and are respectively stamped with a first flow channel and a second flow channel 110. Specifically, the first liquid cooling plate (not shown) is located on top of the second liquid cooling plate 11. The first flow channel is formed on the bottom of the first liquid cooling plate facing the second liquid cooling plate 11, and the second flow channel 110 is formed on the top of the second liquid cooling plate facing the first liquid cooling plate. For example, the first flow channel can be formed as a recessed portion opening toward the second liquid cooling plate 11, and the second flow channel 110 can be formed as a recessed portion opening toward the first liquid cooling plate. Preferably, the longitudinal cross-sections of the first and second flow channels 110 are both formed in an arc shape.

[0029] Thus, when the first and second liquid cooling plates 11 are welded together, the first and second flow channels 110 can mate (i.e., interlock) to form a complete liquid cooling channel, allowing coolant to circulate within the channel, thereby effectively cooling and dissipating heat from the battery pack and its cells. It should be noted that there are no specific restrictions on the specifications and layout of the liquid cooling channel, and they can be determined based on actual needs.

[0030] In this embodiment, if Figure 1As shown, the protective portion 3 is stamped from a thin-walled profile, resulting in a rigid plate-like structure. When the battery pack equipped with this protective device is assembled with the vehicle, the protective portion 3 protects the bottom of the battery pack from collisions, scrapes, impacts with gravel, and other conditions. In this embodiment, the protective portion 3 is similar in shape to the liquid cooling portion described above and is welded to each other, thereby confining the insulation portion 2 and the elastic member 4 described below between the liquid cooling portion and the protective portion 3, thereby achieving a "three-layer sandwich" integrated structure of the protective device. Furthermore, a gap is formed at the connection between the liquid cooling portion and the protective portion 3 (for example, the liquid cooling portion and the protective portion 3 can be connected by segmented welding), meaning that the liquid cooling portion and the protective portion 3 are not sealed. As a result, if the coolant in the liquid cooling portion leaks, it can flow through the protective portion 3 to the outside of the battery pack without entering the interior of the battery pack, thereby achieving dry and wet separation of the battery pack and reducing the risk of thermal runaway.

[0031] Furthermore, the guard portion 3 is stamped with a plurality of placement slots 31, each corresponding to each of the elastic members 4. In this embodiment, the elastic members 4 are formed as disc springs, which, through the use of multiple disc springs, enable the present guard device to achieve the technical effects of buffering, energy absorption, and shock absorption. The disc springs are arranged in the placement slots 31 of the guard portion 3, thereby enhancing the impact resistance of the present guard device and the battery pack through the combination of the rigid guard portion 3 and the flexible disc springs.

[0032] In this embodiment, the heat-insulating portion 2 is formed as a resin fiber member. Due to the material properties of the resin fiber itself, the heat-insulating portion 2 itself has strong heat-insulating properties and a large elastic modulus. By arranging the heat-insulating portion 2 between the liquid cooling portion and the protective portion 3, the temperature exchange between the interior of the battery pack and the external environment can be slowed down, that is, the heat exchange rate between the cold liquid, the hot liquid and the air outside the battery pack can be slowed down, thereby improving the cooling or heating effect. In other words, the heat-insulating portion 2 enables the present protective device to have a heat-insulating function. In addition, the heat-insulating portion 2 is also formed with a plurality of limiting through holes 21, and the limiting through holes 21 correspond one-to-one with the above-mentioned elastic member 4, that is, the heat-insulating portion 2 is sleeved on the outer side of the elastic member 4, and the elastic member 4 can be limited by the placement groove 31 and the limiting through holes 21. Based on the elastic properties of the heat-insulating portion 2 itself, it can also cooperate with the elastic member 4 to achieve the technical effects of buffering, energy absorption and shock absorption of the present protective device, and the heat-insulating portion 2 can also cooperate with the protective portion 3 to further improve the impact resistance of the present protective device and the battery pack.

[0033] It should be noted that there are no specific limitations on the specific specifications of the heat insulating portion 2, the number of elastic members 4, or the arrangement of the elastic members 4, as long as the aforementioned technical effects can be achieved. Furthermore, the position-limiting through-holes 21 and placement slots 31 in this embodiment are both clearance-fitted with the elastic members 4, facilitating the elastic members 4's ability to buffer and absorb energy.

[0034] According to the integrated protective device described above, the liquid cooling portion, the heat insulating portion 2, and the protective portion 3 are sequentially arranged along a first direction, so that the protective device forms a "three-layer sandwich" integrated structure. The liquid cooling portion can achieve heat dissipation and cooling of the battery pack; the heat insulating portion 2 can slow the heat exchange rate between the cold liquid, the hot liquid, and the air outside the battery pack, thereby improving the thermal insulation effect of the battery pack; and the protective portion 3 and the plurality of elastic members 4 can achieve the technical effects of buffering, energy absorption, and collision and bump prevention. In other words, the integrated protective device can integrate the functions of heat dissipation, heat preservation, bottom protection, and impact and shock absorption. Compared with existing battery packs that require separate liquid cooling devices, protective devices, and shock absorbing devices (to achieve the above technical effects), the space occupied by the protective device within the battery pack is significantly reduced, effectively improving the space utilization rate of the battery pack, thereby effectively increasing the energy density. In addition, the integrated structure of the protective device can greatly reduce the difficulty of leak detection and repair operations, effectively improving the maintenance efficiency of the equipment.

[0035] According to a second aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the above-mentioned integrated protection device.

[0036] According to a third aspect of the present invention, a vehicle is provided, wherein the vehicle includes the battery pack described above.

[0037] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be described in the scope of protection of the claims.

Claims

1. An integrated protection device, characterized in that: The integrated protection device includes a liquid cooling part, a heat insulating part and a protection part arranged in sequence along a first direction. The liquid cooling part and the protection part are correspondingly connected to limit the heat insulating part. The heat insulating part and the protection part are also connected with multiple elastic parts.

2. The integrated protection device according to claim 1, characterized in that: The liquid cooling portion includes a first liquid cooling plate and a second liquid cooling plate sequentially arranged along the first direction; A first flow channel is formed on the bottom of the first liquid cooling plate facing the second liquid cooling plate, and a second flow channel is formed on the top of the second liquid cooling plate facing the first liquid cooling plate.

3. The integrated protection device according to claim 2, characterized in that: The first liquid cooling plate and the second liquid cooling plate are both formed as stamping parts; when the first liquid cooling plate and the second liquid cooling plate are correspondingly welded, the first flow channel and the second flow channel are correspondingly matched to form a liquid cooling flow channel, and the coolant can circulate in the liquid cooling flow channel.

4. The integrated protection device according to claim 1, characterized in that: The protection portion is formed with a plurality of placement grooves, and the placement grooves correspond to the elastic members one by one.

5. The integrated protection device according to claim 4, characterized in that: The heat insulation portion is formed with a plurality of limiting through holes, and the limiting through holes correspond to the elastic members one by one; the elastic members can be limited by the placement grooves and the limiting through holes.

6. The integrated protection device according to claim 1, characterized in that: The heat insulating portion is formed as a resin fiber member.

7. The integrated protection device according to claim 1, characterized in that: The elastic member is formed as a disc spring.

8. The integrated protection device according to claim 1, characterized in that: A gap is formed at the connection between the liquid cooling part and the protection part.

9. A battery pack, characterized in that: The battery pack is provided with an integrated protection device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle includes the battery pack according to claim 9.

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