CN216055057U

CN216055057U - Battery package box, battery package and vehicle

Info

Publication number: CN216055057U
Application number: CN202121435628.6U
Authority: CN
Inventors: 李建强; 万龙; 彭青波
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-03-15
Anticipated expiration: 2031-06-25

Abstract

The application discloses battery package box, battery package and vehicle, battery package box include box, lid subassembly and liquid cooling runner down. The cover body assembly is covered on the lower box body in a sealing mode and comprises a first cover body and a second cover body, the second cover body is arranged on one side, close to the lower box body, of the first cover body, the liquid cooling flow channel is arranged on one side surface, close to the second cover body, of the first cover body, the liquid cooling flow channel is located between the first cover body and the second cover body, and a liquid inlet and a liquid outlet which are communicated with the liquid cooling flow channel are formed in the first cover body. According to the battery pack box body provided by the embodiment of the application, the liquid cooling flow channel is arranged on one side surface, close to the second cover body, of the first cover body, and is positioned between the first cover body and the second cover body, so that the cooling liquid can circulate outside the box body under the cooling liquid, the leaked cooling liquid is prevented from entering the lower box body, and the problems of short circuit and electric leakage caused by leakage of the cooling liquid are solved. Because the liquid cooling runner is integrated on the lid subassembly, then the structure of battery package box is compacter.

Description

Battery package box, battery package and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a battery pack box body, a battery pack and a vehicle.

Background

In the related art, a battery pack of a vehicle is generally mounted in a lower case of a battery pack case, however, since a liquid cooling plate is also mounted in the lower case, there is a risk of a short circuit and leakage of electricity due to leakage of a cooling liquid.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. To this end, an object of the present application is to provide a battery pack case that can effectively solve the problems of short circuit and leakage of electricity caused by leakage of a coolant.

Another object of the present application is to provide a battery pack having the battery pack case as described above.

It is a further object of the present application to provide a vehicle having the above battery pack.

According to this application first aspect embodiment's battery package box, includes: a lower box body; the cover body assembly is sealed on the lower box body in a sealing mode and comprises a first cover body and a second cover body, and the second cover body is arranged on one side, close to the lower box body, of the first cover body; the liquid cooling runner is arranged on one side surface, close to the second cover body, of the first cover body, the liquid cooling runner is located between the first cover body and the second cover body, and a liquid inlet and a liquid outlet which are communicated with the liquid cooling runner are formed in the first cover body.

According to the battery pack box body provided by the embodiment of the application, the liquid cooling flow channel is arranged on one side surface, close to the second cover body, of the first cover body, and is positioned between the first cover body and the second cover body, so that the cooling liquid can circulate outside the box body under the cooling liquid, the leaked cooling liquid is prevented from entering the lower box body, and the problems of short circuit and electric leakage caused by leakage of the cooling liquid are solved. Meanwhile, the liquid cooling flow channel is integrated on the cover body assembly, so that the overall size of the battery pack box body can be reduced, and the structure of the battery pack box body is more compact.

According to the battery pack box of the embodiment of the application, the first cover body and the second cover body are connected in a sealing mode.

According to the battery pack case of the embodiment of the application, the second cover body is a heat conducting member.

According to battery package box of this application embodiment, the second lid is aluminum alloy spare.

According to the battery pack case of the embodiment of the present application, the first cover is a heat insulator.

According to battery package box of this application embodiment, the lower box includes box body and baffle, this internal accommodation space of injecing of box, the baffle is established in order to incite somebody to action in the accommodation space is for a plurality of subspaces.

According to battery package box of this application embodiment, the box is integrated into one piece down.

According to the battery pack case of the embodiment of the present application, the lower case is a heat insulator.

According to this application embodiment's battery package box, characterized in that, the second lid links to each other with the baffle in order to shutoff the subspace.

According to battery package box of this application embodiment, be equipped with the reinforcement on the surface of at least one lateral wall of box down.

According to battery package box of this application embodiment, the reinforcement is the aluminium alloy.

According to battery package box of this application embodiment, the lateral wall of box down with be equipped with the spacing groove on one of them in the reinforcement, down the box with be equipped with on another in the reinforcement with spacing groove complex is spacing protruding.

According to this application embodiment's battery package box, characterized in that, be equipped with a plurality of separators that separate the setting on the surface of the lateral wall of lower box, adjacent two inject between the separator the spacing groove.

A battery pack according to an embodiment of the second aspect of the present application includes a battery pack case according to an embodiment of the first aspect of the present application described above.

According to the battery pack of the embodiment of the second aspect of the present application, by providing the battery pack case of the embodiment of the first aspect of the present application, the liquid cooling flow channel is provided on one side surface of the first cover body adjacent to the second cover body, and the liquid cooling flow channel is located between the first cover body and the second cover body, so that the cooling liquid can circulate outside the lower case body, the leaked cooling liquid is prevented from entering the lower case body, and the problems of short circuit and electric leakage caused by the leakage of the cooling liquid are solved. Meanwhile, the liquid cooling flow channel is integrated on the cover body assembly, so that the overall size of the battery pack box body can be reduced, and the structure of the battery pack box body is more compact.

A vehicle according to an embodiment of the third aspect of the present application includes the battery pack according to the embodiment of the second aspect of the present application described above.

According to the vehicle of the third aspect of the present application, by providing the battery pack according to the second aspect of the present application, the liquid cooling flow channel is provided on the side surface of the first cover body adjacent to the second cover body, and the liquid cooling flow channel is located between the first cover body and the second cover body, so that the cooling liquid can circulate outside the lower case body, the leaked cooling liquid is prevented from entering the lower case body, and the problems of short circuit and electric leakage caused by the leakage of the cooling liquid are solved. Meanwhile, the liquid cooling flow channel is integrated on the cover body assembly, so that the overall size of the battery pack box body can be reduced, and the structure of the battery pack box body is more compact.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a battery pack case according to an embodiment of the present application;

fig. 2 is an exploded view of a battery pack case according to an embodiment of the present application;

fig. 3 is a side view of a battery pack case according to an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is an exploded view of a cover assembly of a battery pack case according to an embodiment of the present application.

Reference numerals:

a battery pack case 100;

a lower box body 1; a case body 11; a separator 111; a limiting groove 112; a bottom plate 113; a first side plate 114; a second side plate 115; a separator 12;

a cover assembly 2; a first cover 21; a second cover 22; a liquid inlet 211; a liquid outlet 212; a liquid cooling flow passage 213;

a reinforcement 3; the first reinforcement portion 31; a limit protrusion 311; the second reinforcement portion 32; and a fixing hole 321.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

The battery pack case 100 according to the embodiment of the present application is described below with reference to the drawings.

As shown in fig. 1 and 5, the battery pack case 100 according to the embodiment of the present application includes a lower case 1, a cover assembly 2, and a liquid-cooling flow passage 213.

Specifically, an accommodation space may be defined in the lower case 1, and a battery may be disposed in the accommodation space. As shown in fig. 1 and 2, the lower case 1 may be formed in a substantially rectangular parallelepiped shape.

The cover body assembly 2 covers the lower box body 1. For example, the cover assembly 2 may be closed on the top of the lower case 1. In some embodiments of the present application, the cover assembly 2 may be covered on the lower case 1 by a high-strength structural adhesive (e.g., epoxy system and polyurethane system adhesive). Of course, the present application is not limited thereto, and in other embodiments of the present application, the cover assembly 2 may be connected to the lower case 1 by mechanical fixing means such as bolts or rivets. Simple structure and convenient assembly.

Specifically, the cover assembly 2 may include a first cover 21 and a second cover 22, and the second cover 22 is disposed on a side of the first cover 21 adjacent to the lower case 1 (e.g., a lower side of the first cover 21 in fig. 1). In assembly, the first cover 21 and the second cover 22 may be connected together, and then the connected first cover 21 and second cover 22 may be covered on the lower case 1, wherein when the cover assembly 2 is covered on the lower case 1, a side surface of the second cover 22 adjacent to the lower case 1 (for example, a lower side surface of the second cover 22 in fig. 4) may contact with the lower case 1. Simple structure, convenient operation, the installation of the lid subassembly 2 of being convenient for.

Alternatively, the first cover 21 and the second cover 22 may be rectangular in shape. For example, in the example of fig. 5, the first cover 21 and the second cover 22 are formed in a rectangular shape. Such a shape facilitates the fitting of the first lid body 21 and the second lid body 22 with the lower case body 1, so that the difficulty of assembly can be reduced.

The liquid cooling flow channel 213 is disposed on a side surface of the first cover 21 adjacent to the second cover 22 (for example, a lower side surface of the first cover 21 in fig. 5), and the liquid cooling flow channel 213 is located between the first cover 21 and the second cover 22, and a liquid inlet 211 and a liquid outlet 212 communicating with the liquid cooling flow channel 213 are formed on the first cover 21.

For example, in the embodiment shown in fig. 5, the liquid inlet 211 and the liquid outlet 212 may be provided on a side surface of the first cover 21 away from the second cover 22 (for example, an upper side surface of the first cover 21 in fig. 5). The cooling fluid may enter the cooling fluid channel 213 from the fluid inlet 211 and then exit the fluid outlet 212.

So, the coolant liquid in liquid cooling runner 213 can be in liquid cooling runner 213 continuously flow to can continuously cool down the battery through the coolant liquid, guarantee that the battery normally works, can prolong the life-span of battery moreover. Meanwhile, the liquid cooling flow channel 213 is disposed between the first cover 21 and the second cover 22, so that the cooling liquid can circulate outside the lower case 1, and even if the cooling liquid leaks, the cooling liquid cannot enter the lower case 1 to contact with the battery core and the high-voltage component of the battery, thereby avoiding the problems of short circuit and electric leakage of the battery pack case 100 caused by the leakage of the cooling liquid, and improving the safety of the battery pack case 100. In addition, the liquid cooling channel 213 is disposed on the first cover 21, so that the liquid cooling channel 213 can be integrated on the cover assembly 2, which is beneficial to reducing the overall volume of the battery pack case 100, and the battery pack case 100 has a more compact structure.

Specifically, the liquid-cooling flow passage 213 may be pressed into a side surface of the first cover 21 adjacent to the second cover 22 (e.g., a lower side surface of the first cover 21 in fig. 5) during the manufacturing process. Therefore, the processing technology of the battery pack case 100 can be simplified, and the processing efficiency can be improved.

For example, when the battery pack case 100 according to the embodiment of the present application is used, the battery may be first installed in the accommodating space of the lower case 1, and then the first cover 21 and the second cover 22 connected together may be covered on the lower case 1. On the heat that the battery produced at the in-process of work can transmit the second lid 22, take away the heat on the second lid 22 through the coolant liquid in the liquid cooling runner 213, and then can take away the heat that the battery produced, last and the efficient cools down for the battery through the coolant liquid.

Alternatively, the cooling liquid may be water. The water absorbs a large amount of heat as the coolant, and is inexpensive, so that the use cost of the battery pack case 100 can be reduced.

According to the battery pack case 100 of the embodiment of the present application, the liquid cooling channel 213 is disposed on a side surface of the first cover 21 adjacent to the second cover 22, and the liquid cooling channel 213 is disposed between the first cover 21 and the second cover 22, so that the cooling liquid can circulate outside the lower case 1, the leaked cooling liquid is prevented from entering the lower case 1, and the problems of short circuit and electric leakage caused by the leakage of the cooling liquid are solved. Meanwhile, by integrating the liquid cooling flow channel 213 on the lid assembly 2, the overall volume of the battery pack case 100 can be reduced, so that the structure of the battery pack case 100 is more compact.

In the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

According to some embodiments of the present application, the first cover 21 and the second cover 22 are sealingly connected. That is, the space between the first cover 21 and the second cover 22 is sealed. Therefore, when the cooling liquid in the first cover body 21 leaks, the cooling liquid is sealed between the first cover body 21 and the second cover body 22, and the leaked cooling liquid is effectively prevented from entering the lower box body 1, so that the problems of short circuit and electric leakage caused by the leakage of the cooling liquid are avoided.

Alternatively, the first cover 21 and the second cover 22 may be bonded by using epoxy structural adhesive or other water-resistant ethylene glycol-resistant high-strength adhesive, and such a connection manner has better sealing performance, so that leakage of the cooling liquid can be better prevented, and the safety of the battery pack case 100 can be ensured. Of course, the present application is not limited thereto. For example, the first cover 21 and the second cover 22 may be connected by mechanical fixing means such as bolts or rivets.

According to some embodiments of the present application, the second cover 22 is a thermally conductive member. For example, the second cover 22 may be an aluminum alloy member, a heat conductive silicone, copper, or the like. Set up second lid 22 as the heat-conducting piece, can make the heat that the battery in box 1 produced down can lead lid subassembly 2 better for the heat that the battery produced can be taken away by the coolant liquid in liquid cooling runner 213 fast, improved the heat dispersion of battery package box 100, thereby guarantee that the battery can normally work, prolonged the life of battery.

In some alternative embodiments of the present application, the second cover 22 is an aluminum alloy member. Wherein, the aluminum alloy part has good thermal conductivity and lighter weight. From this, through setting up second lid 22 to the aluminum alloy spare, the heat that the battery during operation produced can transmit to second lid 22 fast, and then can take away the heat that the battery produced through the coolant liquid in the liquid cooling runner 213 to the security of better assurance battery package box 100. Meanwhile, the second cover 22 is made of aluminum alloy, which can effectively reduce the quality of the cover assembly 2, and thus can reduce the overall quality of the battery pack case 100.

In addition, the aluminum alloy member has good ductility, and the thickness of the second cover 22 can be reduced during the machining process, for example, the thickness of the second cover 22 can be reduced to less than 1mm, thereby further reducing the mass of the cover assembly 2 and the battery pack case 100.

According to some embodiments of the present application, the first cover 21 is a thermal insulator. For example, the first cover 21 may be a hard foam (hard PU, hard PPE, or the like), a high-strength plastic, a composite material, or the like. Because the performance of the battery is greatly influenced by the temperature, the first cover body 21 is arranged as a heat insulating part, so that the heat of the battery pack box body 100 can be preserved through the first cover body 21, the performance of the battery in a low-temperature environment is guaranteed, and the heat management efficiency of the battery pack box body 100 is improved.

In some embodiments of the present application, when the first cover 21 is provided as a thermal insulator and the second cover 22 is provided as a thermal conductor, since the first cover 21 is a thermal insulator and the second cover 22 is a thermal conductor, the whole cover assembly 2 has a single-sided thermal conductivity, so that the second cover 22 can exchange heat with the battery in the lower case 1, and further, the battery can be cooled by the cooling liquid in the liquid cooling flow channel 213. Meanwhile, the first cover body 21 also plays a role in heat preservation of the lower box body 1, so that the heat management efficiency of the battery pack box body 100 is improved, and the performance of the battery in a low-temperature environment is guaranteed. In addition, due to the heat insulating function of the first cover 21, the heat insulating layer structure in the conventional scheme can be omitted, so that the volume of the battery pack case 100 is smaller.

For example, in the embodiment shown in fig. 1, the first cover 21 is a heat insulating member formed by pressing a hard foam material, the second cover 22 is an aluminum alloy heat conducting member, and the cover assembly 2 has a single-sided heat conducting characteristic, so that the second cover 22 can perform heat exchange with the battery in the lower case 1, the liquid cooling flow channel 213 on the first cover 21 performs heat dissipation and cooling on the battery, and meanwhile, the first cover 21 also performs a heat insulating function on the lower case 1, thereby improving the heat management efficiency of the battery pack case 100 and ensuring the performance of the battery in a low-temperature environment. And since the first cover 21 is made of a hard foam material and the second cover 22 is made of an aluminum alloy, the battery pack case 100 is lighter in weight as compared with the conventional art.

According to some embodiments of the present application, the lower case 1 includes a case body 11 and a partition 12, an accommodating space is defined in the case body 11, and the partition 12 is provided in the accommodating space to partition the accommodating space into a plurality of subspaces. Specifically, the lower box 1 is composed of a box body 11 and a partition plate 12, and the partition plate 12 divides an accommodating space defined by the box body 11 into a plurality of subspaces. In the description of the present application, "a plurality" means two or more. For example, the plurality of subspaces may be two, three, four, etc. The specific number of the subspaces can be adjusted and designed according to the specific specification and model of the lower box body 1.

In some embodiments of the present application, referring to fig. 1 and 2, the case body 11 may include a bottom plate 113, a first side plate 114, and a second side plate 115, the first side plate 114 and the second side plate 115 being disposed opposite to each other on both sides of the bottom plate 113 (e.g., on both left and right sides of the bottom plate 113 in fig. 2). The partition plate 12 is disposed in the box body 11, a lower end of the partition plate 12 may be connected to the bottom plate 113, and an upper end of the partition plate 12 may be connected to the second cover 22.

Thus, the accommodation space can be divided into a plurality of sub-spaces by the partition plates 12 so that the respective cells can be arranged at intervals in the respective sub-spaces, heat transfer between the cells in the adjacent two sub-spaces is reduced, and occurrence of thermal runaway can be prevented to a large extent. In addition, the separator 12 can also play a reinforcing role, so that the pressure resistance of the battery pack case 100 is enhanced.

It is understood that the partition 12 may extend in a first direction (e.g., a left-right direction in fig. 2) and may also extend in a second direction (e.g., a front-back direction in fig. 2). Wherein the first direction is perpendicular to the second direction. One of the first direction and the second direction may be a length direction of the lower case 1, and the first direction and the second direction may be a width direction of the lower case 1.

According to some embodiments of the present application, the lower case 1 is an integrally formed part. Specifically, the case body 11 is integrally formed with the partition plate 12. In the correlation technique, the lower box body is processed and molded by adopting a tailor-welding mode, the flatness processed by the lower box body cannot be guaranteed by the processing mode, the sealing difficulty of the battery pack box body is increased, and the tightness of the battery pack box body is poor. In this application, through setting up box 1 into integrated into one piece spare down, can be so that the surface smoothness of box 1 is better down, be favorable to reducing the sealed degree of difficulty of battery package box 100, and then can improve the leakproofness of battery package box 100, avoid battery package box 100 to leak gas. In addition, the lower case 1 is formed as an integrally formed part, so that redundant assembly parts and connection processes can be omitted, and the assembly efficiency of the battery pack case 100 is greatly improved.

According to some embodiments of the present application, the lower tank 1 is a thermal insulator. For example, the lower case 1 may be aerogel blanket, glass fiber, composite material, or the like. The lower box body 1 is arranged as a heat insulation part, so that the heat of the battery in the accommodating space of the lower box body 1 can be effectively preserved, and the service performance of the battery is guaranteed. Compared with the prior art, the lower box body 1 does not need to be provided with materials such as heat preservation cotton and the like, so that the volume of the lower box body 1 is smaller.

Meanwhile, the first cover body 21 is also a heat insulating member, the first cover body 21 is covered on the lower case body 1 in a sealing manner, and the first cover body 21 and the lower case body 1 form a good sealing space, so that the heat insulating property of the battery pack case body 100 is better, and the heat management efficiency of the battery pack case body 100 is greatly enhanced.

Further, the partition plate 12 is also a heat insulating member, so that the partition plate 12 can better insulate the batteries in each subspace, thereby avoiding the occurrence of thermal runaway and enhancing the safety of the battery pack case 100.

According to some embodiments of the present application, a second cover 22 is attached to the partition 12 to close off the sub-space. That is, each subspace is a sealed space. Because the lower box body 1 is a heat insulating part, each subspace is a sealed space, so that the battery pack box body 100 has good heat insulation performance and good sealing performance, and the risk of air leakage and electric leakage is reduced.

For example, in the embodiment shown in fig. 2, the width of the end surface of the end of the partition plate 12 connected to the second cover 22 (for example, the upper end surface of the partition plate 12 in fig. 2) is larger than the thickness of the partition plate 12, so that the contact area between the partition plate 12 and the second cover 22 can be increased, and the connection between the partition plate 12 and the second cover 22 can be more reliable.

According to some embodiments of the present application, a reinforcement 3 is provided on an outer surface of at least one sidewall of the lower case 1. That is, the reinforcing member 3 may be provided on the outer surface of one or more side walls of the lower case 1, or the reinforcing member 3 may be provided on the outer surface of all the side walls of the lower case 1. For example, in the embodiment shown in fig. 1, the reinforcing members 3 may be provided on the outer surfaces of both side walls in the first direction of the lower case 1, respectively. Therefore, the anti-extrusion capacity of the battery pack case 100 can be enhanced through the reinforcing member 3 on the outer surface of the side wall of the lower case 1, and the safety of the battery pack case 100 is improved.

According to some embodiments of the present application, the reinforcement 3 is an aluminum profile. The aluminum profiles can reduce the weight of the battery pack case 100 and, at the same time, can increase the strength and the anti-extrusion ability of the battery pack case 100. Of course, the reinforcing member 3 of the present application is not limited to an aluminum profile, and may be a composite material. It should be noted that the reinforcement 3 is disposed apart from the second cover 22, that is, the reinforcement 3 is not in contact with the second cover 22. For example, in the embodiment shown in fig. 4, the reinforcement 3 is connected to the lower case 1, but is not in contact with the second cover 22, so that heat transfer between the second cover 22 and the reinforcement 3 is avoided, and the safety of the battery pack case 100 is enhanced.

According to some embodiments of the present application, one of the side wall of the lower case 1 and the reinforcement 3 is provided with a limiting groove 112, and the other of the lower case 1 and the reinforcement 3 is provided with a limiting protrusion 311 engaged with the limiting groove 112. That is to say, when the side wall of the lower box 1 is provided with the limiting groove 112, the reinforcing member 3 may be provided with a limiting protrusion 311 engaged with the limiting groove 112, and when the reinforcing member 3 is provided with the limiting groove 112, the side wall of the lower box 1 may be provided with the limiting protrusion 311 engaged with the limiting groove 112. The limiting groove 112 may be a T-shaped groove, a circular groove, or other special-shaped grooves. Therefore, when assembling, the reinforcing part 3 can be limited through the matching between the limiting protrusion 311 and the limiting groove 112, the assembling difficulty is reduced, and the assembling efficiency is improved.

For example, in some embodiments of the present application, when assembling the reinforcement 3, the limiting protrusion 311 may be inserted into the limiting groove 112, and then the reinforcement 3 may be fixed to the lower case 1 by using an adhesive, a fastener (a screw, a bolt, a rivet), or the like. Therefore, the reinforcing part 3 can be conveniently and firmly connected to the lower box body 1 by adopting a composite connection mode, the structural strength of the battery pack box body 100 is greatly enhanced, and the assembling difficulty is reduced.

For example, in the embodiment shown in fig. 2, two sidewalls of the lower box 1 in the first direction are provided with the limiting grooves 112, that is, the first side plate 114 is provided with the limiting grooves 112, the second side plate 115 is provided with the limiting grooves 112, and the first reinforcing portion 31 of the reinforcing member 3 is provided with the limiting protrusions 311 engaged with the limiting grooves 112, wherein the limiting grooves 112 are elongated. When the reinforcing member 3 is assembled, the limiting protrusion 311 on the first reinforcing portion 31 of the left reinforcing member 3 can be inserted into the limiting groove 112 of the first side plate 114, the limiting protrusion 311 on the first reinforcing portion 31 of the right reinforcing member 3 can be inserted into the limiting groove 112 of the second side plate 115, and the reinforcing members 3 on the left and right sides can be fixed on the lower box body 1 through high-strength structural adhesive. Therefore, the overall stress of the battery pack box 100 is more uniform, and the structural strength of the battery pack box 100 is further improved.

According to some embodiments of the present application, a plurality of partitions 111 are provided on an outer surface of a sidewall of the lower case 1, and a limiting groove 112 is defined between two adjacent partitions 111.

In the description of the present application, "a plurality" means two or more. That is, two, three, four, etc. partitions 111 are provided on the outer surface of the lower case 1 to be spaced apart from each other, and a plurality of limiting protrusions 311 are provided on the reinforcing member 3 to be engaged with the limiting grooves 112. The plurality of limiting grooves 112 are matched with the limiting protrusions 311, so that the strength of the battery pack case 100 is higher, and the anti-extrusion capacity is strong.

For example, as shown in fig. 3 and 4 in combination, the plurality of partitions 111 may be spaced in the height direction of the lower case 1. Of course, the present application is not limited thereto. The plurality of partitions 111 may be spaced apart in a second direction (e.g., a front-rear direction in fig. 2) of the lower case 1, and an elongated stopper groove 112 may be defined between two adjacent partitions 111. Therefore, the limiting protrusion 311 is matched with the limiting groove 112 conveniently, and the assembling difficulty of the reinforcing part 3 and the lower box body 1 is reduced.

In some embodiments of the present application, the reinforcement 3 may include a first reinforcement portion 31 and a second reinforcement portion 32. Referring to fig. 2, the first reinforcement portion 31 is connected to the second reinforcement portion 32. Here, the limiting protrusion 311 may be disposed on one side surface of the first reinforcing part 31, and the second reinforcing part 32 may be connected to the other side surface of the first reinforcing part 31. Optionally, the second reinforcement 32 is perpendicular to the first reinforcement 31. Therefore, the reinforcing effect of the reinforcing member 3 can be improved, the overall structural strength of the battery pack case 100 can be improved, and the anti-extrusion capacity of the battery pack case 100 can be enhanced.

Further, the second reinforcement portion 32 may be provided with a fixing hole 321 for connection with a vehicle. Therefore, the battery pack case 100 can be connected to the vehicle through the fastener, and the battery pack case is simple in structure and convenient to assemble.

A battery pack according to an embodiment of the second aspect of the present application includes a battery pack case 100 according to an embodiment of the first aspect of the present application described above.

According to the battery pack of the embodiment of the second aspect of the present application, by providing the battery pack case 100 according to the embodiment of the first aspect of the present invention, the liquid cooling flow channel 213 is formed on a side surface of the first cover 21 adjacent to the second cover 22, and the liquid cooling flow channel 213 is located between the first cover 21 and the second cover 22, so that the cooling liquid can circulate outside the lower case 1, the leaked cooling liquid is prevented from entering the lower case 1, and the problems of short circuit and electric leakage caused by the leakage of the cooling liquid are solved. Meanwhile, by integrating the liquid cooling flow channel 213 on the lid assembly 2, the overall volume of the battery pack case 100 can be reduced, so that the structure of the battery pack case 100 is more compact.

According to the vehicle of the third aspect of the present application, by providing the battery pack according to the second aspect of the present application, the liquid cooling flow channel 213 is disposed on the side surface of the first cover 21 adjacent to the second cover 22, and the liquid cooling flow channel 213 is located between the first cover 21 and the second cover 22, so that the cooling liquid can circulate outside the lower case 1, the leaked cooling liquid can be prevented from entering the lower case 1, and the problems of short circuit and electric leakage caused by the leakage of the cooling liquid can be solved. Meanwhile, by integrating the liquid cooling flow channel 213 on the lid assembly 2, the overall volume of the battery pack case 100 can be reduced, so that the structure of the battery pack case 100 is more compact.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack case, comprising:

a lower box body;

the cover body assembly is sealed on the lower box body in a sealing mode and comprises a first cover body and a second cover body, and the second cover body is arranged on one side, close to the lower box body, of the first cover body;

the liquid cooling runner is arranged on one side surface, close to the second cover body, of the first cover body, the liquid cooling runner is located between the first cover body and the second cover body, and a liquid inlet and a liquid outlet which are communicated with the liquid cooling runner are formed in the first cover body.

2. The battery pack case according to claim 1, wherein the first cover and the second cover are hermetically connected.

3. The battery pack case according to claim 1, wherein the second cover is a heat conductive member.

4. The battery pack case according to claim 3, wherein the second cover is an aluminum alloy member.

5. The battery pack case according to claim 1, wherein the first cover is a heat insulator.

6. The battery pack case according to claim 1, wherein the lower case includes a case body defining therein an accommodation space and a partition provided in the accommodation space to partition the accommodation space into a plurality of subspaces.

7. The battery pack case of claim 6, wherein the lower case is an integrally formed member.

8. The battery pack case according to claim 6, wherein the lower case is a heat insulator.

9. The battery pack case according to claim 6, wherein the second cover is connected to the partition to block the subspace.

10. The battery pack case according to any one of claims 1 to 9, wherein a reinforcement is provided on an outer surface of at least one side wall of the lower case.

11. The battery pack case according to claim 10, wherein the reinforcing member is an aluminum profile.

12. The battery pack case of claim 10, wherein one of the side wall of the lower case and the reinforcement is provided with a stopper groove, and the other of the lower case and the reinforcement is provided with a stopper protrusion engaged with the stopper groove.

13. The battery pack case according to claim 12, wherein a plurality of partitions are provided on an outer surface of the side wall of the lower case at intervals, and the stopper groove is defined between adjacent two of the partitions.

14. A battery pack characterized by comprising a battery pack case according to any one of claims 1 to 13.

15. A vehicle characterized by comprising the battery pack according to claim 14.