Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, the battery box body comprises: a bottom plate, which is provided with a first cooling cavity, and a first liquid inlet and a first liquid outlet which are respectively communicated with the first cooling cavity; the cover body covers the bottom plate, an accommodating cavity is formed between the cover body and the bottom plate, the accommodating cavity is used for accommodating the battery module, and the cover body is provided with a second cooling cavity, and a second liquid inlet and a second liquid outlet which are respectively communicated with the second cooling cavity; wherein the bottom plate and the cover body are used for being connected with the outer side wall of the battery module respectively, cooling liquid flows into the first cooling cavity through the first liquid inlet so as to exchange heat with one side wall of the battery module and flow out through the first liquid outlet, and the cooling liquid flows into the second cooling cavity through the second liquid inlet so as to exchange heat with the other side wall of the battery module. And heat exchange with other side walls of the battery module is carried out, and the heat flows out through the second liquid outlet. By applying the technical scheme of the utility model, the technical problem of non-uniform cooling of the battery module can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, and in particular to a battery box and a battery pack. Background Art

[0002] Currently, in the field of battery energy storage technology, air cooling and liquid cooling are the mainstream cooling methods. Air cooling has certain requirements for the inlet air temperature, and often needs to be combined with a cooling device to cool the inlet air. In addition, due to the physical characteristics of the air, it is easy to have uneven cooling of the battery module. The liquid cooling method usually involves laying liquid cooling pipes at the bottom of the entire battery box, and using an external liquid cooling unit to pass liquid coolant into the liquid cooling pipes, so that the liquid coolant flows in the pipes and takes away the heat of the battery module. However, this solution can only cool the part of the battery module that is in contact with the liquid cooling pipes, while the temperature of other parts is higher. This will also cause uneven cooling of the battery module, and therefore cannot meet the heat dissipation requirements of the battery box. Utility Model Content

[0003] The embodiments of the present utility model provide a battery box and a battery pack, which can improve the technical problem of uneven cooling of battery modules.

[0004] In the first aspect, an embodiment of the present invention provides a battery case, which includes: a base plate, having a first cooling cavity and a first liquid inlet and a first liquid outlet respectively connected to the first cooling cavity; a cover body, which is arranged on the base plate, and a accommodating cavity is formed between the cover body and the base plate, and the accommodating cavity is used to accommodate a battery module, and the cover body has a second cooling cavity and a second liquid inlet and a second liquid outlet respectively connected to the second cooling cavity; wherein the base plate and the cover body are respectively used to be connected to the outer side walls of the battery module, and the cooling liquid flows into the first cooling cavity through the first liquid inlet to exchange heat with one of the side walls of the battery module and flows out through the first liquid outlet, and the cooling liquid flows into the second cooling cavity through the second liquid inlet to exchange heat with the other side walls of the battery module and flows out through the second liquid outlet.

[0005] In one embodiment, a partition is provided in the first cooling cavity and / or the second cooling cavity, and the partition extends along the first direction to divide the first cooling cavity and / or the second cooling cavity into a plurality of cooling channels.

[0006] In one embodiment, the cover body includes a shell and a cover plate, the shell is arranged around the bottom plate, the cover body covers an end of the shell away from the bottom plate, and the cover plate and / or the shell has a second cooling cavity.

[0007] In one embodiment, the housing and the cover are an integrally formed structure.

[0008] In one embodiment, the battery case further includes a heat conductor, which is disposed in the accommodating cavity. The cover and the bottom plate are respectively provided with heat conductors on the side facing the accommodating cavity. The heat conductor has a first end face and a second end face that are oppositely disposed. The first end face is used to connect to the side wall of the battery module, and the second end face is used to connect to the bottom plate or the cover.

[0009] In one embodiment, the heat conducting member includes: a first side plate having a first end surface; a second side plate spaced apart from the first side plate, the second side plate having a second end surface; a plurality of support members arranged between the first side plate and the second side plate, the support members extending along a first direction and one end of the support members connected to the first side plate, and the other end of the support members connected to the second side plate, the plurality of support members being arranged at intervals to divide the space between the first side plate and the second side plate into a plurality of heat conducting channels.

[0010] In one embodiment, the first side plate, the second side plate and the support member are an integrally formed structure.

[0011] In one embodiment, the included angle between the support member and the first side panel and / or the second side panel is a right angle.

[0012] In one embodiment, the bottom plate and the cover are connected by welding or bolts.

[0013] In one embodiment, the battery box further includes a heat sink, the heat conducting member has an air inlet and an air outlet relatively arranged along the heat conducting channel, and the heat sink is arranged corresponding to the air inlet and / or the air outlet.

[0014] In one embodiment, the heat dissipation element includes an air supply element and an air exhaust element. The air supply element is arranged at the air inlet, and the air exhaust element is arranged at the air outlet.

[0015] In one embodiment, the air outlet of the heat conductive member between the battery module and the base plate and the air inlet of the heat conductive member between the battery module and the cover are located on the same side, and the air inlet of the heat conductive member between the battery module and the base plate and the air outlet of the heat conductive member between the battery module and the cover are located on the same side.

[0016] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery box.

[0017] By applying the technical solution of the present invention, a first cooling cavity and a second cooling cavity are respectively provided on the bottom plate and the cover body, and the first cooling cavity is connected to one of the outer side walls of the battery module, and the second cooling cavity is connected to the other outer side walls of the battery module. In this way, during the operation of the battery module, the first cooling cavity and the second cooling cavity can be used to cool various parts of the battery module as much as possible, thereby realizing the cooling of the battery module as a whole, avoiding the problem of uneven cooling of the battery module, and thus meeting the heat dissipation requirements of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a three-dimensional schematic diagram of a battery box provided by an embodiment of the present utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of a base plate provided by an embodiment of the present utility model;

[0021] Figure 3 This is a schematic top view of a base plate provided in an embodiment of the present utility model;

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross section at AA in the middle;

[0023] Figure 5 This is a three-dimensional schematic diagram of a cover provided by an embodiment of the present utility model;

[0024] Figure 6 This is a schematic top view of a cover provided by an embodiment of the present utility model;

[0025] Figure 7 yes Figure 6 Schematic diagram of the cross section at the middle BB;

[0026] Figure 8 This is a three-dimensional schematic diagram of a heat conducting member provided in an embodiment of the present utility model;

[0027] Figure 9 It is a schematic diagram of an explosion of a battery box provided in an embodiment of the present utility model.

[0028] The above drawings include the following reference numerals:

[0029] 10. Bottom plate; 11. First cooling chamber; 12. First liquid inlet; 13. First liquid outlet;

[0030] 20. Cover; 21. Second cooling chamber; 22. Second liquid inlet; 23. Second liquid outlet; 24. Housing; 25. Cover plate;

[0031] 30. Accommodation cavity;

[0032] 40. Separator;

[0033] 50. Heat conducting member; 51. First side plate; 52. Second side plate; 53. Support member; 54. Heat conducting channel;

[0034] 60. Heat dissipation component; 61. Air supply component; 62. Air exhaust component;

[0035] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0037] like Figures 1 to 9 As shown, in the first aspect, an embodiment of the present invention provides a battery case, which includes: a base plate 10, having a first cooling cavity 11 and a first liquid inlet 12 and a first liquid outlet 13 respectively connected to the first cooling cavity 11; a cover body 20, which is covered on the base plate 10, and a receiving cavity 30 is formed between the cover body 20 and the base plate 10, and the receiving cavity 30 is used to accommodate a battery module, and the cover body 20 has a second cooling cavity 21 and a second liquid inlet 22 and a second liquid outlet 23 respectively connected to the second cooling cavity 21; wherein, the base plate 10 and the cover body 20 are respectively used to be connected to the outer side walls of the battery module, and the coolant flows into the first cooling cavity 11 through the first liquid inlet 12 to exchange heat with one of the side walls of the battery module and flows out through the first liquid outlet 13, and the coolant flows into the second cooling cavity 21 through the second liquid inlet 22 to exchange heat with the other side walls of the battery module and flows out through the second liquid outlet 23.

[0038] By applying the technical solution of the present invention, a first cooling cavity 11 and a second cooling cavity 21 are respectively provided on the base plate 10 and the cover body 20, and the first cooling cavity 11 is connected to one of the outer side walls of the battery module, and the second cooling cavity 21 is connected to the other outer side walls of the battery module. In this way, during the operation of the battery module, the first cooling cavity 11 and the second cooling cavity 21 can be used to cool various parts of the battery module as much as possible, thereby realizing the cooling of the entire battery module to avoid the problem of uneven cooling of the battery module, and thus meeting the heat dissipation requirements of the battery box.

[0039] In this application, X is the first direction and Y is the second direction.

[0040] In one embodiment, a partition 40 is provided in the first cooling chamber 11 and / or the second cooling chamber 21. The partition 40 extends along the first direction to divide the first cooling chamber 11 and / or the second cooling chamber 21 into multiple cooling channels. In the present application, multiple partitions 40 are provided in the first cooling chamber 11, and the multiple partitions 40 are arranged at intervals along the second direction. One partition 40 is provided in the first cooling chamber 11. This arrangement can ensure that the coolant does not interfere with each other during flow, thereby facilitating the stability of the coolant flow and improving the heat exchange efficiency of the coolant.

[0041] In one embodiment, the cover 20 includes a housing 24 and a cover plate 25. The housing 24 is disposed around the base plate 10, and the cover 20 covers the end of the housing 24 away from the base plate 10. The cover plate 25 and / or the housing 24 define a second cooling cavity 21. This arrangement rationally utilizes the space of the cover 20 while not occupying excessive installation space. This not only meets the cooling requirements of the battery module, but also enables the miniaturization of the device.

[0042] Optionally, in other embodiments of the present application, a second cooling chamber 21 can also be provided on the shell 24. The specific setting should be selected according to the use environment of the device, which can improve the applicability and scope of application of the battery box.

[0043] In one embodiment, the housing 24 and cover plate 25 are integrally molded. This integral structure, formed through a single molding process, provides the housing 24 and cover plate 25 with exceptional strength and durability. This structure resists deformation or damage, ensuring the stability and durability of the housing 24 and cover plate 25. In other embodiments of the present application, the housing 24 and cover plate 25 may be separate structures, as long as the requirements for the use of the cover body 20 are met.

[0044] In one embodiment, the battery case further includes a heat conductor 50, which is disposed in the accommodating cavity 30. A heat conductor 50 is disposed between the battery module and the base plate 10, and between the battery module and the cover 20. The heat conductor 50 has a first end face and a second end face that are relatively disposed. The first end face is used to connect to the side wall of the battery module, and the second end face is used to connect to the base plate 10 or the cover 20.

[0045] In one embodiment, the heat conducting member 50 includes: a first side plate 51 having a first end surface; a second side plate 52 spaced apart from the first side plate 51 and having a second end surface; and a plurality of support members 53 disposed between the first side plate 51 and the second side plate 52. The support members 53 extend along a first direction, one end of the support member 53 being connected to the first side plate 51 and the other end being connected to the second side plate 52. The plurality of support members 53 are spaced apart along a second direction to divide the space between the first side plate 51 and the second side plate 52 into a plurality of heat conducting channels 54. This structure allows for timely transfer of heat from the battery module to the first cooling chamber 11 and the second cooling chamber 21. Furthermore, the support members 53 and the heat insulating member divide the space between the first side plate 51 and the second side plate 52 into a plurality of heat conducting channels 54, thereby improving the heat transfer effect of the heat conducting member 50 on the battery module.

[0046] In one embodiment, the first side panel 51, the second side panel 52, and the support member 53 are integrally molded. This integrally molded structure, through a single molding process, provides the first side panel 51, the second side panel 52, and the support member 53 with extremely high strength and durability. This structure is not easily deformed or damaged, ensuring the stability and durability of the first side panel 51, the second side panel 52, and the support member 53. In other embodiments of the present application, the first side panel 51, the second side panel 52, and the support member 53 may also be configured as separate structures, as long as the requirements for the use of the first side panel 51, the second side panel 52, and the support member 53 are met.

[0047] In one embodiment, the angle between the support member 53 and the first side plate 51 and / or the second side plate 52 is a right angle. When the two sides of the heat conducting member 50 are subjected to extrusion pressure, the support member 53 can fit tightly with the wall surface of the second side plate 52, so that the support effect between the first side plate 51 and the second side plate 52 is more stable. At the same time, the pressure on the surface of the first side plate 51 is small, which makes it less likely for the first side plate 51 to bend and deform, and has a longer service life. Optionally, the angle between the support member 53 and the first side plate 51 and / or the second side plate 52 can also be set to an acute angle or an obtuse angle, as long as it can meet the use requirements of the device. The specific setting should be selected according to the use environment of the device, which can improve the applicability and scope of application of the device.

[0048] In one embodiment, the base plate 10 and the cover body 20 are welded or bolted. In the present application, the base plate 10 and the cover body 20 are bolted, and bolt holes are provided on the base plate 10 and the cover body 20 respectively. This arrangement facilitates the disassembly and installation of the base plate 10 and the cover body 20, thereby facilitating the replacement and maintenance of the two, which is beneficial to improving the maintenance efficiency of the base plate 10 and the cover body 20.

[0049] Specifically, the heat conduction channel 54 includes an air cooling channel.

[0050] In one embodiment, the battery case further includes a heat sink 60, and the heat conducting member 50 has an air inlet and an air outlet arranged relatively along the heat conducting channel 54. The heat sink 60 is arranged corresponding to the air inlet and / or the air outlet, and the medium flow direction of the heat sink 60 is parallel to the extension direction of the heat conducting channel 54. This arrangement facilitates the heat sink 60 to disperse the heat in the heat conducting channel 54, thereby realizing the internal circulation of the temperature inside the battery case, so that the temperature of each part of the battery module tends to be the same, reducing the temperature difference between each part. In the present application, the number of heat sinks 60 can be set to correspond one-to-one with the heat conducting member 50, and the number of heat sinks 60 can also be set to be less than the number of heat conducting components, as long as it can meet the use requirements of the device. The specific setting should be selected according to the use environment of the device, which can improve the applicability and scope of application of the device.

[0051] In the present application, the heat sink 60 is specifically a heat dissipation fan. The above structure is simple, which not only facilitates the installation between components, but also improves the assembly efficiency and reduces the use cost of the device.

[0052] Furthermore, the heat conducting member 50 has an air inlet and an air outlet arranged opposite to each other along the heat conducting channel 54, and the heat dissipating member 60 includes an air supply member 61, which is arranged at the air inlet. This arrangement can increase the flow rate of air in the battery box, thereby improving the cooling efficiency of the battery module.

[0053] In one embodiment, the heat sink 60 further includes an air extraction member 62, which is disposed at the air outlet. This arrangement can increase the flow rate of air in the battery box, thereby improving the cooling efficiency of the battery module.

[0054] Specifically, the air outlet of the heat conducting member 50 between the battery module and the bottom plate 10 and the air inlet of the heat conducting member 50 between the battery module and the cover 20 are located on the same side, and the air inlet of the heat conducting member 50 between the battery module and the bottom plate 10 and the air outlet of the heat conducting member 50 between the battery module and the cover 20 are located on the same side. This arrangement allows air to circulate inside the battery case, facilitating heat transfer to the first cooling chamber 11 and the second cooling chamber 21. The coolant then exchanges heat with the outside world, thus ensuring the heat dissipation efficiency of the battery case as much as possible.

[0055] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery box.

[0056] By applying the technical solution of the present invention, a first cooling cavity 11 and a second cooling cavity 21 are respectively provided on the base plate 10 and the cover body 20, and the first cooling cavity 11 is connected to one of the outer side walls of the battery module, and the second cooling cavity 21 is connected to the other outer side walls of the battery module. In this way, during the operation of the battery module, the first cooling cavity 11 and the second cooling cavity 21 can be used to cool various parts of the battery module as much as possible, thereby realizing the cooling of the entire battery module to avoid the problem of uneven cooling of the battery module, and thus meeting the heat dissipation requirements of the battery box.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0059] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: The battery box includes: A bottom plate having a first cooling cavity and a first liquid inlet and a first liquid outlet respectively connected to the first cooling cavity; a cover body, which is disposed on the bottom plate, and a receiving cavity is formed between the cover body and the bottom plate, wherein the receiving cavity is used to receive the battery module, and the cover body has a second cooling cavity and a second liquid inlet and a second liquid outlet respectively connected to the second cooling cavity; In which, the bottom plate and the cover are respectively used to be connected to the outer side walls of the battery module, and the coolant flows into the first cooling cavity through the first liquid inlet to exchange heat with one of the outer side walls of the battery module and flows out through the first liquid outlet, and the coolant flows into the second cooling cavity through the second liquid inlet to exchange heat with the other outer side walls of the battery module and flows out through the second liquid outlet.

2. The battery box according to claim 1, characterized in that: A partition is provided in the first cooling cavity and / or the second cooling cavity. The partition extends along a first direction to divide the first cooling cavity and / or the second cooling cavity into a plurality of cooling channels.

3. The battery box according to claim 1, characterized in that: The cover body includes a shell and a cover plate. The shell is arranged around the bottom plate. The cover body covers an end of the shell away from the bottom plate. The cover plate and / or the shell has the second cooling cavity.

4. The battery box according to claim 3, characterized in that: The shell and the cover plate are an integrally formed structure.

5. The battery case according to any one of claims 1 to 4, characterized in that: The battery case also includes a heat-conducting member, which is respectively provided on the side of the cover and the bottom plate facing the accommodating cavity. The heat-conducting member has a first end face and a second end face that are oppositely arranged. The first end face is used to connect to the side wall of the battery module, and the second end face is used to connect to the bottom plate or the cover.

6. The battery box according to claim 5, characterized in that: The heat conducting member comprises: a first side plate having the first end surface; a second side plate spaced apart from the first side plate, the second side plate having the second end surface; A plurality of support members are arranged between the first side plate and the second side plate, the support members extend along a first direction and one end of the support member is connected to the first side plate, and the other end of the support member is connected to the second side plate, and the plurality of support members are arranged at intervals to divide the space between the first side plate and the second side plate into a plurality of heat conduction channels.

7. The battery box according to claim 6, characterized in that: The first side plate, the second side plate and the support member are an integrally formed structure.

8. The battery box according to claim 6, characterized in that: An included angle between the support member and the first side panel and / or the second side panel is a right angle.

9. The battery case according to any one of claims 1 to 8, characterized in that: The bottom plate and the cover body are connected by welding or bolts.

10. The battery box according to claim 7, characterized in that: The battery box further includes a heat sink, the heat conducting member having an air inlet and an air outlet arranged opposite to each other along the heat conducting channel, and the heat sink is arranged corresponding to the air inlet and / or the air outlet.

11. The battery case according to claim 10, characterized in that: The heat dissipation component includes an air supply component and an air exhaust component. The air supply component is arranged at the air inlet, and the air exhaust component is arranged at the air outlet.

12. The battery case according to claim 10, characterized in that: The air outlet of the heat conductive member between the battery module and the base plate and the air inlet of the heat conductive member between the battery module and the cover are located on the same side, and the air inlet of the heat conductive member between the battery module and the base plate and the air outlet of the heat conductive member between the battery module and the cover are located on the same side.

13. A battery pack, characterized in that: The battery pack includes a battery case according to any one of claims 1 to 11.

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