CN219677399U - Battery pack box, battery pack and vehicle - Google Patents

Abstract

The utility model relates to a battery pack box, a battery pack and a vehicle. The battery pack box body comprises a cover plate, a bottom plate and a cold plate assembly arranged between the cover plate and the bottom plate. The cold plate assembly comprises an upper plate, a runner plate and a supporting frame clamped between the upper plate and the runner plate, wherein a groove is formed on one side of the upper plate and is connected with the cover plate, and the other side of the upper plate is connected with the runner plate; the support frame is formed with accommodation space, and the recess sets up in accommodation space. The battery pack box body has high integration degree, and reduces the cost of parts; the supporting frame is internally arranged in the cold plate assembly to support the upper plate, and the grooves and the runner plates formed by the upper plate are utilized to bear the weight of the battery module together, so that the structural strength of the battery pack box body is improved.

Description

Battery pack box, battery pack and vehicle

Technical Field

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

Background

The lower box body of the current battery pack usually adopts an aluminum alloy section bar as a box body frame and is connected with an integrated cold plate in a welding mode, a hot melting self-tapping mode and the like so as to ensure the safety of the whole structure, and a large number of fasteners are required to be used for ensuring the structural strength in the connecting mode, so that the cost of parts is high and the quality is heavy; and can lead to fastener stress attenuation, and then cause the sealing material compression volume between cold plate and the frame boundary beam to reduce, reveal the risk higher.

Disclosure of Invention

The embodiment of the utility model provides a battery pack box, a battery pack and a vehicle, which are used for solving or improving the technical problems of high cost and poor sealing performance of parts of the battery pack box.

In a first aspect, an embodiment of the present utility model provides a battery pack case, including a cover plate, a bottom plate, and a cold plate assembly disposed between the cover plate and the bottom plate, where the cold plate assembly includes an upper plate, a flow channel plate, and a support frame interposed between the upper plate and the flow channel plate, one side of the upper plate is formed with a groove and connected with the cover plate, the other side of the upper plate is connected with the flow channel plate, the support frame is formed with an accommodating space, and the groove is disposed in the accommodating space.

Optionally, the support frame includes a plurality of boundary beams, and a plurality of boundary beams link to each other in proper order end to end encloses into accommodation space to hold the recess.

Optionally, one side of the upper plate connected with the cover plate comprises an extension part, and the width of the extension part is greater than or equal to that of the side beam; the boundary beam is respectively connected with the extension part and the runner plate.

Optionally, the upper plate further includes a transverse reinforcing rib and a longitudinal reinforcing rib, the transverse reinforcing rib and the longitudinal reinforcing rib are alternately arranged in the groove and connected with two opposite side walls of the groove, and the groove is divided into a plurality of sub-grooves by the transverse reinforcing rib and the longitudinal reinforcing rib.

Optionally, the support frame further comprises a cross beam and a longitudinal beam, the cross beam and the longitudinal beam are arranged in the accommodating space in a staggered manner and are connected with two opposite side beams, the cross beam and the longitudinal beam divide the accommodating space into a plurality of accommodating cavities, and the plurality of sub-grooves are respectively arranged in the plurality of accommodating cavities.

Optionally, the width of the cross beam is smaller than or equal to the width of the transverse reinforcing rib, and the cross beam is connected with the transverse reinforcing rib and the runner plate; the width of the longitudinal beam is smaller than or equal to that of the longitudinal reinforcing ribs, and the longitudinal beam is connected with the longitudinal reinforcing ribs and the runner plates.

Optionally, a liquid cooling runner is formed on one side of the runner plate connected with the upper plate, and the other side of the runner plate is connected with the bottom plate.

In a second aspect, an embodiment of the present utility model further provides a battery pack, including the battery pack case as described above.

In a third aspect, embodiments of the present utility model also provide a vehicle including a battery pack as described above.

Compared with the prior art, the battery pack box provided by the embodiment of the utility model has the advantages that the supporting frame is arranged in the cold plate assembly, so that the supporting frame is connected with the upper plate and the runner plate for supporting the battery module at the same time, and the integral strength and the bearing capacity of the cold plate assembly are improved; through will connect upper cover, upper plate and braced frame respectively, braced frame, runner board and bottom plate have saved required sealant and connecting fastener among the prior art, when saving spare part cost, have guaranteed the seal reliability of box.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of a battery pack according to an embodiment of the present utility model.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of part B of fig. 2.

Fig. 5 is an exploded view of a battery pack case according to an embodiment of the present utility model.

Fig. 6 is a schematic view of the upper plate in fig. 5.

Fig. 7 is a schematic view of the flow field plate of fig. 5.

Fig. 8 is a schematic view of the structure of the support frame of fig. 5.

Fig. 9 is a schematic cross-sectional view of a side surface of a battery pack case according to an embodiment of the present utility model.

Fig. 10 is an enlarged view of part C in fig. 9.

Fig. 11 is an enlarged view of a portion D in fig. 9.

Marking: 1. a battery pack; 2. a battery pack case; 10. a cover plate; 20. a cold plate assembly; 201. an upper plate; 2011. a groove; 2012. transverse reinforcing ribs; 2013. longitudinal reinforcing ribs; 2014. a sub-groove; 2015. an extension; 202. a support frame; 2021. an accommodation space; 2022. edge beams; 2023. a cross beam; 2024. a longitudinal beam; 2025. a receiving chamber; 203. a flow channel plate; 2031. a liquid cooling runner; 30. a bottom plate; 40. a battery module; 204. a first fastener; 205. a second fastener; 206. a third fastener; 207. and a fourth fastener.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

In the description of the present utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. 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.

Referring to fig. 1 to 4, a battery pack case 2 according to an embodiment of the present utility model includes a cover plate 10, a bottom plate 30, and a cold plate assembly 20 disposed between the cover plate 10 and the bottom plate 30, the cold plate assembly 20 including an upper plate 201, a flow path plate 203, and a support frame 202 interposed between the upper plate 201 and the flow path plate 203. The upper plate 201 is formed at one side thereof with a groove 2011 and coupled with the cap plate 10, which together define an inner space for disposing the battery module 40. The recess 2011 is formed by punching the upper plate 201 along the direction from the cover plate 10 to the bottom plate 30, and the punching depth is 40-90 mm. In the present embodiment, the upper plate 201 and the cover plate 10 are connected by a third fastener 206, and preferably, the third fastener 206 is a bolt.

Further, the other side of the upper plate 201 is connected with the flow channel plate 203, whereby the flow channel plate 203 and the groove 2011 formed in the upper plate 201 together bear the weight of the battery module 40, which improves the strength of the supporting structure of the battery module 40. Further, the supporting frame 202 is formed with an accommodating space 2021, and the groove 2011 formed by the upper plate 201 is disposed in the accommodating space 2021, so that the rigidity and the supporting strength of the whole cold plate assembly 20 are improved by arranging the supporting frame 202 in the cold plate assembly 20 to support the upper plate 201, so that the battery pack case 2 can meet the load bearing requirement of the multi-battery module 40 or the heavy-weight battery module 40; compared with the prior art in which the supporting frame 202 is disposed outside the cold plate assembly 20, the battery pack case 2 provided in the application embodiment saves the cost of parts, and further reduces the overall weight of the battery pack case 2.

Referring to fig. 8, in the present embodiment, the supporting frame 202 is formed by sequentially connecting a plurality of side beams 2022 end to end, so as to define an accommodating space 2021, the number of side beams 2022 and the shape and size of the accommodating space 2021 formed by the plurality of side beams 2022 are determined according to the accommodating requirements of the battery module 40 and the groove 2011, taking a rectangular prism battery module 40 as an example, the groove 2011 should be set to the present embodiment, the supporting frame 202 is formed by surrounding 4 side beams 2022, and the shape of the accommodating space 2021 is illustrated as a rectangular prism.

Referring to fig. 4 and 11, alternatively, an extension 2015 is formed at an outer circumference of a side of the upper plate 201 connected to the cover plate 10, i.e., the extension 2015 has an L-shaped cross section with an edge of the upper plate 201; the width of the extension 2015 is greater than or equal to the width of the side beam 2022, in other words, the extension 2015 of the upper plate 201 is integrally erected on the side beam 2022, and by attaching at least part of the extension 2015 to the side beam 2022, the bearing capacity of the upper plate 201 can be improved, and the overall strength of the battery pack case 2 can be ensured. Further, the side beam 2022 is connected with the extension portion 2015 and the runner plate 203 respectively, the connection manner may be through a plurality of fasteners, or may be welding, in this embodiment, by way of example, through fastener connection, a plurality of fastener mounting holes are formed by corresponding punching on the periphery of the extension portion 2015, the side beam 2022 and the runner plate 203 at equal intervals, the distance between every two adjacent fastener mounting holes is 75-100 mm, specifically, the upper surface of the side beam 2022 is connected with the extension portion 2015 through the first fastener 204, the lower surface of the side beam 2022 is connected with the runner plate 203 through the second fastener 205, the shape of the fastener mounting holes may be round holes or hexagonal holes, and the aperture size is determined according to the specifications of the first fastener 204 and the second fastener 205. The connection mode makes the upper and lower surfaces of the side beam 2022 receive the tensile stress of the fastener, so that the side beam 2022 is respectively and tightly connected with the extension 2015 and the runner plate 203, compared with the prior art, the sealing element between the cold plate assembly 20 and the supporting element is omitted, the sealing performance of the cold plate assembly 20 and the battery pack box 2 is ensured, and meanwhile, the cost of parts and the weight of the battery pack box 2 are reduced.

Referring to fig. 6, to improve the strength of the upper plate 201, the upper plate 201 further includes transverse reinforcing ribs 2012 and longitudinal reinforcing ribs 2013, and the transverse reinforcing ribs 2012 and the longitudinal reinforcing ribs 2013 are disposed in the grooves 2011 in a staggered manner and are respectively connected with two opposite side walls of the grooves 2011 so as to divide the grooves 2011 into a plurality of sub-grooves 2014. The number of the transverse reinforcing ribs 2012 and the number of the longitudinal reinforcing ribs 2013 are determined according to the number of the battery modules 40, wherein the number of the transverse reinforcing ribs 2012 and the number of the longitudinal reinforcing ribs 2013 may be equal, for example, the upper plate 201 is provided with 1 transverse reinforcing rib 2012 and 1 longitudinal reinforcing rib 2013, and the groove 2011 is divided into 4 sub-grooves 2014, and the number of the battery modules 40 that the upper plate 201 may accommodate is also 4; the number of transverse ribs 2012 and the number of longitudinal ribs 2013 may also be unequal, such as when the upper plate 201 is provided with 1 transverse rib 2012 and 2 longitudinal ribs 2013, and the groove 2011 is divided into 6 sub-grooves 2014, and the number of battery modules 40 that the upper plate 201 can accommodate is also 6. The provision of the transverse stiffener 2012 and the longitudinal stiffener 2013 enhances the rigidity and the load bearing capacity of the upper plate 201, and also satisfies the use requirements of the multi-module battery pack 1. The same technical effect can be achieved when the number of one of the lateral stiffener 2012 and the longitudinal stiffener 2013 is 0, and the embodiment of the present utility model is not particularly limited herein.

Referring to fig. 5 and 8, in correspondence with the transverse reinforcement 2012 and the longitudinal reinforcement 2013 provided in the upper plate 201, the support frame 202 optionally further includes a cross beam 2023 and a longitudinal beam 2024, and the cross beam 2023 and the longitudinal beam 2024 are staggered in the accommodating space 2021 formed by the support frame 202 and are respectively connected to two opposite side beams 2022 by arc welding, so as to divide the accommodating space 2021 into a plurality of accommodating cavities 2025, and the plurality of sub-grooves 2014 are respectively provided in the plurality of accommodating cavities 2025. It will be appreciated that, in order to locate the sub-grooves 2014 within the receiving cavity 2025, the number of cross members 2023 and the number of transverse ribs 2012 are the same, the location of the cross members 2023 corresponds to the recess formed by the transverse ribs 2012, and similarly, the number of stringers 2024 and the number of longitudinal ribs 2013 are the same, the location of the stringers 2024 corresponds to the recess formed by the longitudinal ribs 2013. By arranging the sub-grooves 2014 in the accommodating cavities 2025, respectively, the bearing capacity and rigidity of each sub-groove 2014 are improved, and the use requirement of the heavy-weight multi-module battery pack 1 is met.

Referring to fig. 10, further, the width d' of the cross beam 2023 is smaller than or equal to the width d of the transverse stiffener 2012, and the cross beam 2023 is connected with the transverse stiffener 2012 and the runner plate 203, that is, the cross beam 2023 is placed in a space enclosed by the transverse stiffener 2012 and the runner plate 203, and in the vertical direction, the cross beam 2023 is attached to the transverse stiffener 2012 and the runner plate 203, in the horizontal direction, the cross beam 2023 may be attached to a side wall of the transverse stiffener 2012, or may be spaced from a side wall of the transverse stiffener 2012 by a certain distance. The connection between the beam 2023 and the transverse stiffener 2012 and the runner plate 203 is preferably welding, and in order to ensure the sealing effect of the welding, the welding seams on the beam 2023, the transverse stiffener 2012 and the runner plate 203 need to be polished before the welding, so as to ensure that the welding seams do not exceed the contact surface between the beam 2023 and the transverse stiffener 2012 and the contact surface between the transverse and the runner plate 203.

Likewise, the width d' of the stringers 2024 is less than or equal to the width d of the longitudinal ribs 2013, the stringers 2024 being connected to the longitudinal ribs 2013 and the runner plate 203. The positional relationship and the connection relationship of the side members 2024 with the longitudinal ribs 2013 and the flow field plates 203 are the same as those described above with respect to the cross members 2023.

Referring to fig. 3 and 7, a liquid cooling flow channel 2031 is formed at one side of the flow channel plate 203 connected to the upper plate 20, and the other side is connected to the bottom plate 30. In this embodiment, the runner plate 203 is connected to the bottom plate 30 by a fourth fastener 207, and preferably, the fourth fastener 207 is a bolt. Optionally, the depth of the liquid cooling channel 2031 is 3-7 mm. The upper plate 20 and the liquid cooling flow channel 2031 together define a flow space for the cooling liquid, and when the cooling liquid flows in the liquid cooling flow channel 2031, overheating of the battery module can be prevented to avoid safety accidents.

In the battery pack case 2 provided in the embodiment of the utility model, the first fastener 204, the second fastener 205, the third fastener 206 and the fourth fastener 207 are rivet nuts, and the third fastener 206 and the fourth fastener 207 are bolts, wherein the screw rod of the third fastener 206 is in tight fit with the threaded hole of the first fastener 204, and the screw rod of the fourth fastener 207 is in tight fit with the threaded hole of the second fastener 205.

The embodiment of the utility model also provides a battery pack 1, and the battery pack 1 comprises the battery pack box body 2. Referring to fig. 1 and 3, in the battery pack 1, the battery module 40 is disposed in the groove 2011 or the sub-groove 2014 of the upper plate 201. Optionally, the battery module 40 may be connected to the bottom of the groove 2011 or the sub-groove 2014 by a heat conductive structural adhesive, so as to transfer heat generated during operation of the battery module 40 to the runner plate 203 below the upper plate 20, thereby preventing overheat risk.

The embodiment of the utility model also provides a vehicle, which comprises the battery pack 1. The battery pack 1 may be placed in the chassis of a vehicle; the upper cover 10 of the battery pack 1 may be integrated with the vehicle floor.

The battery pack 1 and the vehicle provided by the embodiment of the utility model have all the beneficial effects of the battery pack case 2, and the disclosure is not repeated here.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents. Such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A battery pack case, comprising:

a cover plate (10);

a bottom plate (30); and

the cold plate assembly (20) is arranged between the cover plate (10) and the bottom plate (30), the cold plate assembly (20) comprises an upper plate (201), a runner plate (203) and a supporting frame (202) clamped between the upper plate (201) and the runner plate (203), a groove (2011) is formed on one side of the upper plate (201) and is connected with the cover plate (10), the other side of the upper plate (201) is connected with the runner plate (203), an accommodating space (2021) is formed on the supporting frame (202), and the groove (2011) is arranged in the accommodating space (2021).

2. The battery pack case according to claim 1, wherein the support frame (202) includes a plurality of side beams (2022), and the side beams (2022) are connected end to end in sequence to define the accommodating space (2021) so as to accommodate the groove (2011).

3. The battery pack case according to claim 2, wherein a side of the upper plate (201) connected to the cover plate (10) includes an extension (2015), a width of the extension (2015) being greater than or equal to a width of the side rail (2022); the side beam (2022) is connected to the extension portion (2015) and the flow channel plate (203), respectively.

4. The battery pack case according to claim 1, wherein the upper plate (201) further comprises a transverse stiffener (2012) and a longitudinal stiffener (2013), the transverse stiffener (2012) and the longitudinal stiffener (2013) being disposed in the groove (2011) in a staggered manner and connected to two opposite side walls of the groove (2011), the transverse stiffener (2012) and the longitudinal stiffener (2013) dividing the groove (2011) into a plurality of sub-grooves (2014).

5. The battery pack case according to claim 4, wherein the support frame (202) further comprises a cross beam (2023) and a longitudinal beam (2024), the cross beam (2023) and the longitudinal beam (2024) are alternately disposed in the accommodating space (2021) and connected with two opposite side beams (2022), the cross beam (2023) and the longitudinal beam (2024) divide the accommodating space (2021) into a plurality of accommodating cavities (2025), and a plurality of sub-grooves (2014) are respectively disposed in a plurality of the accommodating cavities (2025).

6. The battery pack case according to claim 5, wherein the width of the cross member (2023) is smaller than or equal to the width of the lateral stiffener (2012), the cross member (2023) being connected to the lateral stiffener (2012) and the flow path plate (203);

the width of the longitudinal beam (2024) is smaller than or equal to the width of the longitudinal reinforcing rib (2013), and the longitudinal beam (2024) is connected with the longitudinal reinforcing rib (2013) and the runner plate (203).

7. The battery pack case according to claim 1, wherein a liquid-cooled runner (2031) is formed on a side of the runner plate (203) connected to the upper plate (201), and the other side of the runner plate (203) is connected to the bottom plate (30).

8. The battery pack case according to claim 1, wherein the groove (2011) is formed by stamping, and the depth of the groove (2011) is 40-90 mm.

9. A battery pack comprising the battery pack case according to any one of claims 1 to 8.

10. A vehicle comprising the battery pack according to claim 9.