CN219350519U - Battery pack box and battery pack - Google Patents

Abstract

A battery pack box and a battery pack relate to the technical field of batteries. The battery pack box body comprises a frame, a bottom plate, a reinforcing beam assembly and a supporting connecting piece; the frame is arranged on the bottom plate and defines a containing cavity together with the bottom plate; the reinforcement beam assembly and the support connecting piece are arranged in the accommodating cavity, and the frame, the bottom plate, the reinforcement beam assembly and the support connecting piece jointly define an accommodating position for accommodating the battery; the reinforcement beam assembly comprises at least two first reinforcement beams extending in a first direction; a first liquid cooling channel is arranged in the first reinforcement beam; the support connecting piece is fixedly arranged between the at least two first reinforcing beams. The battery pack includes a battery pack case. According to the battery pack box and the battery pack, the liquid cooling channel is arranged in the first reinforcing beam, so that the temperature of the battery cell arranged in the battery pack box can be adjusted, the heat spreading caused by thermal runaway of the battery cell is reduced or avoided, and the space utilization rate of the battery pack box is effectively improved.

Description

Battery pack box and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack box and a battery pack.

Background

The battery generates a large amount of heat in the battery during charging and discharging, and needs to be timely radiated so as not to influence the use state and service life of the battery; in addition, when the battery cell is out of control, if the temperature of the battery cell cannot be effectively controlled, the situation of heat spreading can occur, and the battery cell is involved in other battery cells to be out of control. Therefore, how to effectively take away the heat generated by the battery cell, and how to efficiently regulate the temperature of the battery cell, and how to prevent the heat spreading when the battery cell is out of control are important.

In the prior art, a special liquid cooling plate and a liquid cooling pipeline are arranged in a battery pack and used for taking heat generated by a battery cell away, adjusting the temperature of the battery cell and reducing or avoiding heat spreading when the battery cell is out of control; however, this approach takes up a lot of space, resulting in a low battery pack space utilization.

Disclosure of Invention

The utility model aims to provide a battery pack box and a battery pack, which solve the technical problem of low space utilization rate of the battery pack caused by a liquid cooling plate and a liquid cooling pipeline which are arranged for adjusting the temperature of a battery cell in the prior art to a certain extent.

In order to achieve the above object, the present utility model provides the following technical solutions:

a battery pack box body comprises a frame, a bottom plate, a reinforcing beam assembly and a supporting connecting piece; the frame is arranged on the bottom plate and is jointly limited with the bottom plate to form a containing cavity; the reinforcement beam assembly and the support connecting piece are arranged in the accommodating cavity, and the frame, the bottom plate, the reinforcement beam assembly and the support connecting piece jointly define an accommodating position so as to accommodate a battery;

the reinforcement beam assembly includes at least two first reinforcement beams extending in a first direction; a first liquid cooling channel is arranged in the first stiffening beam;

the support connecting piece is fixedly arranged between at least two first reinforcing beams.

A battery pack includes a battery pack case.

The beneficial effects of the utility model are mainly as follows:

the utility model provides a battery pack box body and a battery pack, which comprise a frame, a bottom plate, a reinforcement beam assembly and a support connecting piece, wherein the frame, the bottom plate, the reinforcement beam assembly and the support connecting piece jointly define a containing position for containing a battery, and the reinforcement beam assembly comprises at least two first reinforcement beams; the first stiffening beam and the supporting connecting piece can improve the mechanical strength of the battery pack box to a certain extent, further ensure that the battery pack box has a good bearing function, and can form a containing position for containing the battery together with the frame and the bottom plate so as to better contain the battery; through the first liquid cooling channel in the first stiffening beam, the temperature in the battery pack box body can be adjusted by the first stiffening beam with bearing function and mechanical strength, especially the side wall temperature of the battery is adjusted, the heat spreading when the electric core in the battery pack box body is out of control is reduced or avoided, the traditional liquid cooling plate and liquid cooling pipeline can be omitted, and the space utilization rate of the battery pack box body is effectively improved.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery pack case according to an embodiment of the present utility model;

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

FIG. 3 is an exploded view of a base plate provided by an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a base plate provided by an embodiment of the present utility model;

FIG. 5 is an enlarged view of area A of the base plate shown in FIG. 4;

FIG. 6 is a schematic diagram of a liquid cooling system of a base plate according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a liquid cooling system of a stiffening beam assembly according to an embodiment of the present utility model;

FIG. 8 is an enlarged view of a portion of the stiffening beam assembly shown in FIG. 7;

FIG. 9 is a schematic structural view of a stiffening beam assembly according to an embodiment of the present utility model;

FIG. 10 is a schematic cross-sectional view of a first reinforcement beam according to an embodiment of the present utility model;

FIG. 11 is a schematic cross-sectional view of a first reinforcement beam and a second reinforcement beam provided by an embodiment of the present utility model;

fig. 12 is a partial enlarged view of the first and second reinforcement beams shown in fig. 11.

Icon: 10-frames; 20-a bottom plate; 21-a first bottom plate; 22-a second floor; 23-a backplane sub-board; 231-a third liquid inlet; 232-a third liquid outlet; 24-a third liquid cooling channel; 25-rivets; 26-connecting grooves; 30-stiffening beam assembly; 31-a first stiffening beam; 311-a first liquid inlet; 312-a first liquid outlet; 313-a first manifold outlet; 314—a first header inlet; 315—a first sealing joint; 316-a first plug; 317-first beam baffles; 318-first gap; 32-a second reinforcing beam; 323-a second collecting inlet; 324-a second manifold outlet; 325-a second sealing joint; 326-a second plug; 327-a second beam bulkhead; 328-second gap; 33-a fastener; 34-a first liquid cooling channel; 341-a first liquid inlet sub-channel; 342-a first liquid outlet sub-channel; 35-a second liquid cooling channel; 351-a second liquid inlet subchannel; 352-second liquid outlet sub-channel; 40-support connection.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

The embodiment provides a battery pack box body and a battery pack; referring to fig. 1 to 12, fig. 1 is a schematic structural diagram of a battery pack case provided in this embodiment, and fig. 2 is an exploded view of the battery pack case provided in this embodiment; FIG. 3 is an exploded view of the base plate provided in this embodiment; fig. 4 is a cross-sectional view of the base plate provided in the present embodiment; FIG. 5 is an enlarged view of area A of the base plate shown in FIG. 4; FIG. 6 is a schematic diagram of a liquid cooling system of a base plate according to the present embodiment; fig. 7 is an exploded schematic view of a liquid cooling system of the stiffening beam assembly according to the present embodiment, and fig. 8 is a partial enlarged view of the stiffening beam assembly shown in fig. 7; fig. 9 is a schematic structural diagram of a stiffening beam assembly according to this embodiment. Fig. 10 is a schematic cross-sectional view of a first reinforcing beam provided in this embodiment, fig. 11 is a schematic cross-sectional view of a first reinforcing beam and a second reinforcing beam provided in this embodiment, a cross-sectional direction shown in fig. 10 is perpendicular to a cross-sectional direction shown in fig. 11, and fig. 12 is a partially enlarged view of the first reinforcing beam and the second reinforcing beam shown in fig. 11. The arrows shown in fig. 6-8 are the directions of the liquid flow, and the arrows of the liquid flow of the first reinforcement beam 31 in fig. 7 are shown outside the first reinforcement beam 31 for the sake of more clear illustration of the structure.

The battery pack box body provided by the embodiment is used for a power battery, such as a power battery for an energy storage power supply system of a hydraulic power station, a firepower station, a wind power station, a solar power station and the like, and a power battery for an electric vehicle such as an electric bicycle, an electric motorcycle, an electric automobile and the like.

Referring to fig. 1 to 12, the battery pack case according to the present embodiment includes a frame 10, a bottom plate 20, a reinforcement beam assembly 30, and a support connection member 40; the frame 10 is arranged on the bottom plate 20, and the frame 10 and the bottom plate 20 jointly define a containing cavity; the reinforcement beam assembly 30 and the support connector 40 are disposed in the receiving cavity, and the frame 10, the bottom plate 20, the reinforcement beam assembly 30 and the support connector 40 together define a receiving position for receiving the battery. In this embodiment, the number of the receiving locations is plural, that is, the frame 10, the bottom plate 20, the reinforcement beam assembly 30 and the support connector 40 together form plural receiving locations for receiving the battery. Optionally, the stiffening beam assembly 30 is fixedly connected to the frame 10 and the bottom plate 20, respectively. In this embodiment, the battery in the accommodating position may be one battery or a group of batteries, and the specific number of the batteries may be adjusted according to the actual situation.

The reinforcement beam assembly 30 includes at least two first reinforcement beams 31 extending in a first direction, the first reinforcement beams 31 having first liquid cooling channels 34 disposed therein. Through at least two first stiffening beams 31, not only can ensure the intensity of battery package box to a certain extent, but also can make frame 10, bottom plate 20, stiffening beam subassembly 30 and support connecting piece 40 form the position of acceping better. The first liquid cooling passage 34 is provided in the first reinforcement beam 31 to regulate the temperature of the side wall of the battery.

The support connection 40 is fixedly arranged between at least two first reinforcement beams 31. By providing the support connection member 40 between at least two first reinforcement beams 31, the support connection member 40 can better exert a supporting effect to ensure that the battery pack case has good mechanical strength. Alternatively, the number of first reinforcement beams 31 is two, and the support link 40 is provided between the two first reinforcement beams 31.

The battery pack case body in this embodiment includes a frame 10, a bottom plate 20, a reinforcement beam assembly 30, and a support connection member 40, where the frame 10, the bottom plate 20, the reinforcement beam assembly 30, and the support connection member 40 together define a storage location for storing a battery, and the reinforcement beam assembly 30 includes at least two first reinforcement beams 31; through the first reinforcement beam 31 and the support connecting piece 40, the mechanical strength of the battery pack box body can be improved to a certain extent, so that the battery pack box body can be guaranteed to have a good bearing function, and a containing position for containing batteries can be defined together with the frame 10 and the bottom plate 20, so that the batteries can be better contained; through the first liquid cooling channel 34 in the first stiffening beam 31, the temperature in the battery pack box body can be regulated by the first stiffening beam 31 with bearing function and mechanical strength, especially the side wall temperature of the battery is regulated, the heat spreading when the electric core in the battery pack box body is out of control is reduced or avoided, the traditional liquid cooling plate and liquid cooling pipeline can be omitted, and the space utilization rate of the battery pack box body is effectively improved.

In the present embodiment, the number of the first reinforcing beams 31 and the number of the second reinforcing beams 32 may be determined according to the actual situations such as the battery capacity, the cell arrangement, and the like.

Referring to fig. 1 and 2, in an alternative to this embodiment, the reinforcement beam assembly 30 includes a plurality of second reinforcement beams 32 extending in a second direction, the first direction intersecting the second direction. The plurality of second reinforcing beams 32 are matched with the first reinforcing beams 31 and the supporting connecting pieces 40 on one hand, so that the mechanical strength of the battery pack box body is further improved, and the battery pack box body is further ensured to have a good bearing function; on the other hand, the frame 10, the bottom plate 20, the first reinforcing beam 31 and the support connector 40 further define a receiving position for receiving the battery together to better receive the battery. Optionally, the first direction is perpendicular to the second direction.

Optionally, a second liquid cooling channel 35 is disposed in the second reinforcement beam 32 and is in communication with the first liquid cooling channel 34. The side wall of the battery can be further temperature-controlled by the second liquid cooling passage 35. The first liquid cooling channel 34 is communicated with the second liquid cooling channel 35, so that the structure is simplified, and the temperature of the side wall of the battery is conveniently controlled.

In an alternative of the present embodiment, a plurality of second reinforcement beams 32 may be provided at one side or both sides of the first reinforcement beam 31; for example, a plurality of second reinforcement beams 32 are sequentially arranged at intervals on one side of the first reinforcement beam 31 away from the support connecting piece 40, and the support connecting piece 40 is directly and fixedly connected with the first reinforcement beam 31; or, a plurality of second reinforcing beams 32 are sequentially and alternately arranged on two sides of the first reinforcing beam 31, and the supporting connecting piece 40 is fixedly connected with the first reinforcing beam 31 through the second reinforcing beams 32. Through the structural arrangement of the first reinforcing beam 31 and the second reinforcing beam 32, the reinforcing beam assembly 30, the frame 10 and the bottom plate 20 form a containing position better, and the first liquid cooling channel 34 in the first reinforcing beam 31 and the second liquid cooling channel 35 in the second reinforcing beam 32 can regulate the temperature of the side wall of the battery better.

In the alternative of this embodiment, the first liquid cooling channel 34 provided in the first reinforcement beam 31 on the same side as the support connector 40 is communicated with the second liquid cooling channel 35 provided in the second reinforcement beam 32, that is, the liquid cooling channel in the first reinforcement beam 31 on the same side as the support connector 40 is communicated with the liquid cooling channel in the second reinforcement beam 32. The first liquid cooling channel 34 and the second liquid cooling channel 35 on the same side of the supporting connecting piece 40 are communicated, so that the structure is simplified, the temperature of the side wall of the battery is conveniently controlled, and the heat spreading caused by thermal runaway of the battery core in the battery pack box body is reduced or avoided.

Referring to fig. 7 to 12, in an alternative of the present embodiment, each first reinforcing beam 31 is provided with a first collecting outlet 313 and a first collecting inlet 314; each second reinforcement beam 32 is provided with a second collecting inlet 323 and a second collecting outlet 324; the first collecting outlet 313 communicates with the second collecting inlet 323; the first manifold inlet 314 communicates with the second manifold outlet 324; wherein, the first collecting outlet 313 and the first collecting inlet 314 are respectively communicated with the first liquid cooling channel 34, and the second collecting inlet 323 and the second collecting outlet 324 are respectively communicated with the second liquid cooling channel 35.

In the second direction, the second collecting inlet 323 and the second collecting outlet 324 are located at the same end of the second reinforcing beam 32; optionally, the second collecting inlet 323 and the second collecting outlet 324 are located at an end of the second reinforcing beam 32 near the first reinforcing beam 31. The second liquid cooling passage 35 is brought into communication with the first liquid cooling passage 34 by disposing the second collecting inlet 323 and the second collecting outlet 324 at the same end of the second reinforcing beam 32.

Optionally, a second plug 326 is connected to an end of the second reinforcement beam 32 remote from the first reinforcement beam 31. Plugging an end of the second reinforcement beam 32 away from the first reinforcement beam 31 by a second plug 326; the second liquid cooling passage 35 of the second reinforcing beam 32 is formed in a relatively simple structure by the second plug 326, the second collecting inlet 323, and the second collecting outlet 324.

In this embodiment, the cooling liquid flows from the first collecting outlet 313 of the first reinforcing beam 31 into the second collecting inlet 323 of the second reinforcing beam 32 to flow into the second liquid cooling passage 35, flows out of the second liquid cooling passage 35 through the second collecting outlet 324 of the second reinforcing beam 32, and flows into the first collecting inlet 314 of the first reinforcing beam 31.

In an alternative scheme of the embodiment, the second reinforcement beam 32 is fixedly connected with the first reinforcement beam 31 through one or more modes of bonding, clamping, riveting, screwing and welding; or the second reinforcement beam 32 is connected to the first reinforcement beam 31 by other connection means.

Referring to fig. 8 and 11, in an alternative of the present embodiment, the second reinforcement beam 32 is fixedly connected to the first reinforcement beam 31 by a fastener 33; the second reinforcement beam 32 and the first reinforcement beam 31 are connected by a fastener 33 to improve the connection strength between the second reinforcement beam 32 and the first reinforcement beam 31.

Alternatively, the fastener 33 is a screw, rivet, or other connection.

Referring to fig. 8 and 11, in the alternative of the present embodiment, the first collecting outlet 313 or the first collecting inlet 314 is provided with a first sealing joint 315, and the second collecting inlet 323 or the second collecting outlet 324 is provided with a second sealing joint 325; the first sealing joint 315 is sealingly connected to a corresponding second sealing joint 325; that is, the first sealing joint 315 of the first collecting outlet 313 is sealingly connected to the second sealing joint 325 of the second collecting inlet 323, and the first sealing joint 315 of the first collecting inlet 314 is sealingly connected to the second sealing joint 325 of the second collecting outlet 324. The convenience and sealability of the connection between the first collecting outlet 313 and the second collecting inlet 323 are improved by the first sealing joint 315 and the second sealing joint 325.

The battery package box, through the fixed second stiffening beam 32 of fastener 33 and first stiffening beam 31, through the second liquid cooling passageway 35 of first stiffening beam 32 and the first liquid cooling passageway 34 of first stiffening beam 31 of first sealed joint 315 and second sealed joint 325 intercommunication, also the liquid way connection and the fixed connection separation setting of second stiffening beam 32 and first stiffening beam 31 have both ensured the firmness that second stiffening beam 32 and first stiffening beam 31 are connected, have effectively improved the sealing performance of liquid way between second stiffening beam 32 and the first stiffening beam 31 again.

Optionally, one or more sealing rings are provided on the first sealing joint 315. Optionally, one or more sealing rings are provided on the second sealing joint 325.

Referring to fig. 8-11, the second reinforcement beam 32 is optionally provided with a second beam baffle 327 extending in a second direction to divide the second liquid cooling channel 35 into a second liquid inlet sub-channel 351 and a second liquid outlet sub-channel 352; the second liquid inlet sub-channel 351 communicates with the second collecting inlet 323, for example, the second liquid inlet sub-channel 351 forms the second collecting inlet 323 at the second reinforcing beam 32; the second liquid outlet sub-channel 352 communicates with the second collecting outlet 324, e.g. the second liquid outlet sub-channel 352 forms the second collecting outlet 324 at the second reinforcement beam 32.

A second gap 328 is formed between the second plug 326 and the second beam baffle 327, i.e., the second plug 326 is spaced apart from the second beam baffle 327; the second liquid inlet sub-channel 351 communicates with the second liquid outlet sub-channel 352 through the second gap 328. The second fluid inlet sub-passage 351 and the second fluid outlet sub-passage 352 are communicated with the second beam partition 327 through the second stopper 326 at an end of the second reinforcing beam 32 remote from the first reinforcing beam 31, and the fluid cooling passage of the second reinforcing beam 32 is provided in a relatively simple structure.

Optionally, the second liquid cooling channel 35 is U-shaped or similar.

Referring to fig. 7 to 10, in an alternative scheme of the present embodiment, a first reinforcing beam 31 is provided with a first liquid inlet 311 and a first liquid outlet 312; the first liquid inlet 311 and the first liquid outlet 312 are respectively communicated with the first liquid cooling channel 34. Along the first direction, the first liquid inlet 311 and the first liquid outlet 312 are both positioned at one end of the first reinforcement beam 31; the first liquid inlet 311 and the first liquid outlet 312 are both positioned at the same end of the first reinforcing beam 31, so that the second liquid cooling channel 35 is communicated with the first liquid cooling channel 34. Alternatively, the first liquid inlet 311 and the first liquid outlet 312 are threaded holes or passage openings with other structures.

Optionally, a first plug 316 is connected to the other end of the first reinforcement beam 31; the first plug 316 is used to plug the first liquid cooling channel 34 on the first reinforcement beam 31.

Referring to fig. 7-11, the first reinforcement beam 31 is provided with a first beam baffle 317 extending in a first direction to divide the first liquid cooling channel 34 into a first liquid inlet sub-channel 341 and a first liquid outlet sub-channel 342; the first liquid inlet sub-channel 341 is in communication with the first liquid inlet 311, e.g., the first liquid inlet sub-channel 341 forms the first liquid inlet 311 in the first reinforcement beam 31; the first liquid outlet sub-channel 342 communicates with the first liquid outlet 312, for example, the first liquid outlet sub-channel 342 forms the first liquid outlet 312 at the first reinforcement beam 31.

Optionally, a first gap 318 is provided between the first plug 316 and the first beam bulkhead 317, that is, the first plug 316 is spaced apart from the first beam bulkhead 317; the first liquid inlet sub-channel 341 communicates with the first liquid outlet sub-channel 342 through the first gap 318. The first bulkhead 316 is connected to the first beam bulkhead 317, so that the first liquid inlet sub-channel 341 and the first liquid outlet sub-channel 342 are connected to one end of the first reinforcement beam 31 away from the first liquid inlet 311. The liquid cooling passage of the first reinforcing beam 31 is provided in a relatively simple structure by the first stopper 316 being fitted with the first beam bulkhead 317.

Optionally, the first liquid cooling channel 34 is U-shaped or similar.

In this embodiment, the cooling liquid in the battery pack case flows into the first liquid cooling channel 34 from the first liquid inlet 311, that is, into the first liquid inlet sub-channel 341, flows into the second current collecting inlet 323 of the second reinforcement beam 32 through the first current collecting outlet 313 of the first reinforcement beam 31, flows into the second liquid cooling channel 35, that is, flows into the second liquid inlet sub-channel 351 and the second liquid outlet sub-channel 352 in sequence, flows into the first current collecting inlet 314 of the first reinforcement beam 31 through the second current collecting outlet 324 of the second reinforcement beam 32, and flows out through the first liquid outlet sub-channel 342 and the first liquid outlet 312 of the first reinforcement beam 31.

Referring to fig. 3-6, in an alternative of this embodiment, the bottom plate 20 is provided with a third liquid cooling channel 24; the bottom plate 20 is provided with a liquid cooling passage to regulate the temperature of the bottom of the battery.

The bottom plate 20 includes a first bottom plate 21 and a second bottom plate 22; the first surface of the first bottom plate 21 is connected with the frame 10, and the second surface of the first bottom plate 21 is connected with the second bottom plate 22; wherein the first face of the first base plate 21 corresponds to the second face. For example, the first surface of the first bottom plate 21 is a top surface, and the second surface of the first bottom plate 21 is a bottom surface.

The third liquid cooling passage 24 is provided in the first bottom plate 21. By providing the bottom plate 20 as the first bottom plate 21 and the second bottom plate 22 so that the first bottom plate 21 can be provided with the third liquid cooling channel 24, the temperature of the battery cells can be regulated, and the second bottom plate 22 plays a bearing and supporting role.

In the battery pack box body in the embodiment, by optimizing the structure of the battery pack box body, the first reinforcement beam 31, the second reinforcement beam 32 and the bottom plate 20 for fixing and bearing the battery cells are internally provided with liquid cooling channels, so that the battery cells can be efficiently warmed, and the battery cells can be fixed and borne; the battery pack box omits a traditional liquid cooling plate and a traditional liquid cooling pipeline, reduces the number of parts to a certain extent, effectively improves the space utilization rate of the battery pack box, reduces the production cost, reduces the weight of the battery pack box, and can further realize the light weight of the battery.

Referring to fig. 3-5, in an alternative to this embodiment, the base plate 20 includes a plurality of base plate sub-plates 23; the plurality of bottom plate sub-plates 23 are fixedly connected in sequence; that is, each of the base sub-boards 23 includes a first base 21 and a second base 22. By providing a plurality of base sub-boards 23, the production process of the base board 20 is facilitated.

Alternatively, the arrangement direction of the first base plate 21 and the second base plate 22 intersects with the connection direction of the plurality of base plate sub-plates 23; alternatively, the arrangement direction of the first chassis 21 and the second chassis 22 is perpendicular to the connection direction of the plurality of chassis sub-boards 23.

Optionally, at least part of the first bottom plate 21 of the bottom plate sub-plate 23 has a third liquid cooling channel 24. Optionally, the first bottom plate 21 of all bottom plate sub-plates 23 has a third liquid cooling channel 24. The first bottom plate 21 passing through all the bottom plate sub-plates 23 has a third liquid cooling passage 24 to enhance the temperature adjusting capability to the bottom of the battery.

In an alternative to this embodiment, at least part of the second bottom plate 22 of the bottom plate sub-plate 23 has a honeycomb reinforcement structure. Optionally, the second bottom plate 22 of all bottom plate sub-plates 23 has a honeycomb reinforcement structure. The honeycomb reinforcing structure is used for improving the strength of the bottom plate 20 of the battery pack box body against external collision and protecting the battery in the battery pack box body.

Referring to fig. 6, in an alternative of this embodiment, a third liquid inlet 231 and a third liquid outlet 232 are provided at the same end of the bottom board sub-board 23 along the first direction. Alternatively, the extending direction of the bottom sub-board 23 is parallel to the first direction.

The third liquid inlet 231 and the third liquid outlet 232 are respectively disposed on the first surface of the first bottom plate 21.

The third liquid inlet 231 and the third liquid outlet 232 are respectively communicated with the third liquid cooling channel 24. Through third inlet 231 and third liquid outlet 232, and third inlet 231 and third liquid outlet 232 set up in the same end of bottom plate daughter board 23, can simplify the structure of third liquid cooling passageway 24 to a certain extent, be favorable to the flow of liquid in the third liquid cooling passageway 24.

In an alternative scheme of the embodiment, two adjacent bottom plate sub-plates 23 are connected by one or more modes of bonding, clamping, riveting, screwing and welding; or two adjacent base sub-boards 23 are connected by other connection means. As shown in fig. 5, two adjacent bottom plate sub-boards 23 are clamped by adopting a mortise and tenon structure, wherein a connecting groove 26 is arranged on a tenon, and glue solution adhered to mortise holes is filled in the connecting groove 26; further, the adjacent two bottom sub-boards 23 are riveted by rivets 25.

The embodiment also provides a battery pack, which comprises the battery pack box body according to any one of the embodiments. The battery pack includes one or more battery pack cases. This battery package, through setting up the liquid cooling passageway of battery package box in first stiffening beam 31 and second stiffening beam 32, will also be the liquid cooling passageway integration in having bearing function and mechanical strength's structure promptly, both can adjust the electric core temperature that sets up in the battery package box, reduce or avoid the heat spreading that appears when electric core thermal runaway, can save traditional liquid cooling board and liquid cooling pipeline again, effectively improved the space utilization of battery package box.

The battery pack provided in this embodiment includes the above-mentioned battery pack case, and the technical features of the above-mentioned disclosed battery pack case are also applicable to the battery pack, and the technical features of the above-mentioned disclosed battery pack case are not repeated. The battery pack in this embodiment has the advantages of the battery pack case described above, and the advantages of the battery pack case disclosed above are not repeated here.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (13)

1. The battery pack box is characterized by comprising a frame (10), a bottom plate (20), a reinforcing beam assembly (30) and a supporting connecting piece (40); the frame (10) is arranged on the bottom plate (20) and is jointly limited with the bottom plate (20) to form a containing cavity; the reinforcement beam assembly (30) and the support connecting piece (40) are arranged in the accommodating cavity, and the frame (10), the bottom plate (20), the reinforcement beam assembly (30) and the support connecting piece (40) jointly define an accommodating position so as to accommodate a battery;

the reinforcement beam assembly (30) comprises at least two first reinforcement beams (31) extending in a first direction; a first liquid cooling channel (34) is arranged in the first stiffening beam (31);

the support connection (40) is fixedly arranged between at least two first reinforcement beams (31).

2. The battery pack case of claim 1, wherein the reinforcement beam assembly (30) further comprises a plurality of second reinforcement beams (32) extending in a second direction, the first direction intersecting the second direction; a second liquid cooling channel (35) communicated with the first liquid cooling channel (34) is arranged in the second reinforcing beam (32);

a plurality of second reinforcement beams (32) are sequentially arranged at intervals on one side, far away from the supporting connecting piece (40), of the first reinforcement beams (31); or, a plurality of second stiffening beams (32) are sequentially arranged on two sides of the first stiffening beam (31) at intervals, and the supporting connecting piece (40) is fixedly connected with the first stiffening beam (31) through the second stiffening beams (32).

3. The battery pack case according to claim 2, wherein the first liquid cooling passage (34) provided in the first reinforcement beam (31) on the same side as the support connection member (40) communicates with the second liquid cooling passage (35) provided in the second reinforcement beam (32).

4. A battery pack case according to claim 3, wherein each first reinforcement beam (31) is provided with a first current collecting outlet (313) and a first current collecting inlet (314), and each second reinforcement beam (32) is provided with a second current collecting inlet (323) and a second current collecting outlet (324); -said first collecting outlet (313) communicating with said second collecting inlet (323); -said first collecting inlet (314) communicates with said second collecting outlet (324); the first collecting outlet (313) and the first collecting inlet (314) are respectively communicated with the first liquid cooling channel (34), and the second collecting inlet (323) and the second collecting outlet (324) are respectively communicated with the second liquid cooling channel (35);

the second collecting inlet (323) and the second collecting outlet (324) are positioned at one end of the second reinforcing beam (32) close to the first reinforcing beam (31); and one end, far away from the first reinforcement beam (31), of the second reinforcement beam (32) is connected with a second plug (326).

5. The battery pack case according to claim 4, wherein the first collecting outlet (313) or the first collecting inlet (314) is provided with a first sealing joint (315), and the second collecting inlet (323) or the second collecting outlet (324) is provided with a second sealing joint (325); the first sealing joint (315) is in sealing connection with the corresponding second sealing joint (325).

6. The battery pack case according to claim 4, wherein the second reinforcement beam (32) is provided with a second beam partition plate (327) extending in the second direction to partition the second liquid cooling passage (35) into a second liquid inlet sub-passage (351) and a second liquid outlet sub-passage (352); the second liquid inlet sub-channel (351) is communicated with the second collecting inlet (323); the second liquid outlet sub-channel (352) is communicated with the second collecting outlet (324);

a second gap (328) is formed between the second plug (326) and the second beam baffle (327), and the second liquid inlet sub-channel (351) is communicated with the second liquid outlet sub-channel (352) through the second gap (328).

7. The battery pack case according to any one of claims 2-6, wherein the first reinforcement beam (31) is further provided with a first liquid inlet (311) and a first liquid outlet (312), and the first liquid inlet (311) and the first liquid outlet (312) are located at one end of the first reinforcement beam (31); the other end of the first stiffening beam (31) is connected with a first plug (316).

8. The battery pack case according to claim 7, wherein the first reinforcement beam (31) is provided with a first beam partition (317) extending in the first direction to partition the first liquid cooling channel (34) into a first liquid inlet sub-channel (341) and a first liquid outlet sub-channel (342); the first liquid inlet sub-channel (341) is communicated with the first liquid inlet (311); the first liquid outlet sub-channel (342) is communicated with the first liquid outlet (312);

a first gap (318) is formed between the first plug (316) and the first beam baffle (317), and the first liquid inlet sub-channel (341) is communicated with the first liquid outlet sub-channel (342) through the first gap (318).

9. The battery pack case according to any one of claims 2 to 6, further comprising a fastener (33), wherein the second reinforcement beam (32) is fixedly connected to the first reinforcement beam (31) by the fastener (33).

10. The battery pack case according to any one of claims 1 to 6, wherein the bottom plate (20) is provided with a third liquid cooling passage (24);

the bottom plate (20) comprises a first bottom plate (21) and a second bottom plate (22); the first surface of the first bottom plate (21) is connected with the frame (10), and the second surface of the first bottom plate (21) is connected with the second bottom plate (22); the first surface of the first bottom plate (21) corresponds to the second surface;

the third liquid cooling channel (24) is arranged in the first bottom plate (21).

11. The battery pack case according to claim 10, wherein the bottom plate (20) includes a plurality of bottom plate sub-plates (23), the plurality of bottom plate sub-plates (23) being fixedly connected in sequence; at least part of the first bottom plate (21) of the bottom plate sub-plate (23) is provided with the third liquid cooling channel (24).

12. The battery pack case according to claim 11, wherein a third liquid inlet (231) and a third liquid outlet (232) are provided at the same end of the bottom plate sub-plate (23) in the first direction; the third liquid inlet (231) and the third liquid outlet (232) are respectively arranged on the first surface of the first bottom plate (21); the third liquid inlet (231) and the third liquid outlet (232) are respectively communicated with the third liquid cooling channel (24).

13. A battery pack comprising a battery pack case according to any one of claims 1 to 12.

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