Side beam assembly and battery pack case

Abstract

The utility model belongs to battery manufacturing technical field discloses a kind of side beam assembly and battery package box body.Side beam assembly includes coaming and cold plate joint, coaming includes first side beam, first side beam extends along first direction, and installation groove is set in the lower side of first side beam;At least part cold plate joint can be embedded from bottom to top in installation groove and is fixedly connected with first side beam.When installing first side beam and cold plate joint, cold plate joint is placed below, and first side beam is installed from top to bottom, so that cold plate joint is gradually embedded into installation groove from bottom to top, since cold plate joint and first side beam are installed upside down, installation distance need not be reserved in second direction, so that expansion beam can be installed in the position immediately adjacent to cold plate joint in second direction as far as possible, so that the accommodation space of battery module located in the right side of figure is increased, and the capacity of battery package is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a side beam assembly and a battery pack housing. Background Technology

[0002] The cooling medium within the battery cold plate needs to circulate between the internal and external cooling medium of the battery pack via connectors or water pipes and connectors. Existing technologies, such as CN117117395A and similar bent-pipe solutions, eliminate the need for water nozzles and pipes on the substrate of the cold plate. Figure 1 As shown, mounting holes are drilled in the side beam, and the cold plate connector is inserted into the mounting holes and fixed to the side beam. This solution reduces the space required for the connector size, but still requires a relatively large assembly space. Specifically, the connector and other components must maintain a distance of at least y in the extension direction of the hole (defined as the front-to-back direction) (the dotted arrow in the figure indicates the installation path of the cold plate connector). Battery pack housings often need to be divided into distinct areas, requiring reinforcing beams or expansion beams to be installed not far from the connector in the front-to-back direction. Taking an expansion beam as an example, a small space is provided on the front side of the expansion beam, generally for installing electrical components, while the rear side of the expansion beam provides space for the battery module. The larger this space, the better. This installation distance limits the placement of reinforcing beams or expansion beams, resulting in a smaller space for the battery module and a decrease in the battery pack's capacity. When there is insufficient space inside the battery pack, the solution is to place the entire connector outside the pack (CN217655952U). In this case, the corresponding cold plate and flow channels will also extend forward with the connector, and the protruding cold plate area requires a structural design to strengthen its mechanical properties. In addition, this approach requires that there is space in the vehicle to accommodate the protruding structure.

[0003] Therefore, there is an urgent need to design a side beam assembly and a battery pack housing to solve the above problems. Utility Model Content

[0004] One objective of this utility model is to provide a side beam assembly that facilitates the installation of cold plate joints, eliminates the need for additional installation space in the front-rear direction, and ensures that the expansion beam inside the battery pack can be arranged closer to the side beam, thereby expanding the housing space of the battery module.

[0005] Another objective of this utility model is to provide a battery pack housing that facilitates the installation of cold plate connectors, eliminates the need for additional installation space in the front-to-back direction, ensures that the expansion beams inside the battery pack can be arranged closer to the side beams, expands the storage space for the battery modules, and increases the battery pack's capacity.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Side beam assembly, including:

[0008] The enclosure includes a first side beam that extends along a first direction, and an installation groove is provided on the lower side of the first side beam.

[0009] The cold plate joint, at least a portion of which can be embedded from bottom to top into the mounting groove and fixedly connected to the first side beam.

[0010] As an optional solution, the aforementioned cold-rolled plate joint includes:

[0011] A through-wall connector extends along a second direction, which is perpendicular to the first direction.

[0012] Both water taps are fixedly connected to and communicate with the aforementioned through-wall connector. The two water taps and the aforementioned through-wall connector are either integrally formed or separately manufactured.

[0013] As an alternative, the wall-penetrating joint is flush with the outer side of the first side beam on the outer side in the second direction, and the lower side of the wall-penetrating joint is flush with the lower side of the first side beam.

[0014] As an optional solution, the aforementioned cold plate joint also includes a water temperature sensor installed in the aforementioned through-wall joint. The aforementioned through-wall joint has two flow channels corresponding to the two aforementioned water nozzles, and each of the aforementioned flow channels is provided with a water temperature sensor. The water temperature sensor is configured to measure the liquid temperature in the corresponding flow channel.

[0015] As an alternative, the through-wall connector has a protruding mounting part for each of the above-mentioned water temperature sensors. The interior of the mounting part is connected to the corresponding flow channel. The water temperature sensor is inserted into the mounting part and fixed thereto.

[0016] As an alternative, the mounting section has two arc-shaped grooves, the water temperature sensor has a slot, and the retaining spring enters from the two arc-shaped grooves and engages with the slot.

[0017] As an optional solution, the above-mentioned through-wall connector includes:

[0018] The through-wall portion is at least partially embedded in the mounting groove, and the two water nozzles are fixed to the outside of the through-wall portion. The bottom of the through-wall portion is flush with the bottom side of the first side beam.

[0019] Two branches are connected to the inner side of the wall-penetrating portion and are spaced apart along the first direction. Each branch extends along the second direction and has a corresponding flow channel that communicates with the corresponding water nozzle through the wall-penetrating portion.

[0020] As an alternative, the aforementioned cold plate joint is fixed to the aforementioned mounting groove by welding.

[0021] Battery pack housing, including:

[0022] The aforementioned edge beam assembly;

[0023] The cold plate body is fixedly connected to the aforementioned cold plate joint, which has two flow channels, and the two flow channels are respectively connected to the liquid inlet and liquid outlet of the aforementioned cold plate body.

[0024] As an optional solution, the aforementioned enclosure also includes a second side beam, a third side beam, and a fourth side beam that are sequentially connected end to end to form a rectangular frame. The aforementioned battery pack housing also includes a bottom protective plate and a sealing strip. The bottom protective plate has multiple through holes and is threadedly connected to the lower side of the aforementioned rectangular frame. The sealing strip is pasted on the lower side of the aforementioned bottom protective plate and covers the through holes.

[0025] The beneficial effects of this utility model are:

[0026] This utility model provides a side beam assembly. When the first side beam is installed with the cold plate joint, the cold plate joint is placed at the bottom. The first side beam is installed from top to bottom, so that the cold plate joint is gradually embedded into the mounting groove from bottom to top. Since the cold plate joint and the first side beam are installed vertically, there is no need to reserve an installation distance in the second direction. Therefore, the expansion beam in the second direction can be installed as close as possible to the cold plate joint, which increases the accommodating space of the battery module located on the right side of the figure and improves the capacity of the battery pack.

[0027] This utility model also provides a battery pack housing. By adopting the above-mentioned side beam assembly, the installation of the cold plate joint can be facilitated. No additional installation space needs to be reserved in the front and rear directions, ensuring that the expansion beam inside the battery pack can be arranged closer to the side beam, thereby expanding the storage space of the battery module and increasing the capacity of the battery pack. Attached Figure Description

[0028] Figure 1 This is an installation diagram of the cold plate joint and side beam provided by existing technology;

[0029] Figure 2 This is a partial sectional perspective view of the battery pack housing provided in an embodiment of the present invention;

[0030] Figure 3 This is a partial cross-sectional view of the battery pack housing provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the cold plate joint provided in this embodiment of the utility model;

[0032] Figure 5 This is a cross-sectional view of the cold plate joint provided in an embodiment of this utility model.

[0033] In the picture:

[0034] 200, edge beam; 210, mounting hole; 300, cold plate joint;

[0035] 10. Enclosure panel; 11. First side beam; 111. Mounting groove;

[0036] 20. Cold plate joint; 21. Through-wall joint; 211. Flow channel; 212. Mounting part; 2121. Arc groove; 213. Through-wall part; 214. Branch part; 22. Water tap; 23. Water temperature sensor; 231. Groove; 24. Snap ring;

[0037] 30. Cold plate body;

[0038] 40. Bottom guard plate; 41. Through hole; 50. Expansion beam. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] This embodiment provides a side beam assembly that facilitates the installation of the cold plate joint 20, eliminating the need for additional installation space in the front-rear direction. This ensures that the expansion beam 50 within the battery pack can be arranged closer to the side beam, thereby expanding the storage space for the battery module. Figure 2 and Figure 3 As shown, the side beam assembly includes a surrounding plate 10 and a cold plate connector 20. The surrounding plate 10 includes a first side beam 11, which extends along a first direction. An installation groove 111 is formed on the lower side of the first side beam 11. At least a portion of the cold plate connector 20 can be embedded into the installation groove 111 from bottom to top and fixedly connected to the first side beam 11. It should be noted that before installing the cold plate connector 20, the surrounding plate 10 and the expansion beam 50 have been installed as a whole. The surrounding plate 10 also includes a second side beam, a third side beam, and a fourth side beam (not shown in the figure) that are sequentially connected end to end to the first side beam 11 and together form a rectangular frame. This rectangular frame can be understood as the peripheral sidewall of the battery pack housing. The expansion beam 50 is disposed in the peripheral sidewall and connected to the peripheral sidewall.

[0044] When the first side beam 11 and the cold plate joint 20 are installed, the cold plate joint 20 is placed at the bottom, and the first side beam 11 is installed from top to bottom, so that the cold plate joint 20 is gradually embedded into the mounting groove 111 from bottom to top. Since the cold plate joint 20 and the first side beam 11 are installed vertically, there is no need to reserve an installation distance in the second direction. Therefore, the expansion beam 50 can be installed as close as possible to the cold plate joint 20 in the second direction (that is, the front-back direction mentioned in the background art, the second direction is perpendicular to the first direction), so that it is located in the position of being close to the cold plate joint 20. Figure 3 The increased space for the battery module on the right side of the middle section improves the battery pack's capacity.

[0045] Optionally, the cold plate joint 20 is connected to the first side beam 11 by welding. Specifically, the part of the cold plate joint 20 that is in close contact with the three side walls of the mounting groove 111 is welded to the mounting groove 111, so that the cold plate joint 20 and the first side beam 11 are integrated into one unit, which has higher strength.

[0046] Optionally, such as Figure 3 and Figure 4As shown, the cold plate joint 20 includes a through-wall joint 21 and two water nozzles 22. The through-wall joint 21 extends along the second direction, and part of the through-wall joint 21 is welded to the mounting groove 111. Both water nozzles 22 are fixedly connected to and communicate with the through-wall joint 21. The two water nozzles 22 and the through-wall joint 21 are manufactured separately. The first side beam 11 and the through-wall joint 21 are both made of metal and can be welded together. The separate manufacturing of the through-wall joint 21 and the water nozzles 22 facilitates the molding of water nozzles 22 with relatively complex shapes.

[0047] Optionally, the faucet 22 is made of metal and is brazed to the through-wall connector 21 to ensure the depth of the weld and improve the connection strength.

[0048] In an optional embodiment, the faucet 22 may also be made of plastic and be fastened to the wall connector 21 by threads, with a sealing element, such as a sealing ring, provided in the mating surface of the two.

[0049] In an optional embodiment, the faucet 22 may also be integrally formed with the wall-penetrating connector 21, which is not limited here.

[0050] Optionally, the through-wall connector 21 is flush with the outer side of the first side beam 11 on the outer side in the second direction, and the lower side of the through-wall connector 21 is flush with the lower side of the first side beam 11. This ensures that the side beam assembly, once formed as a single unit, has a flat surface on the front side, improving aesthetics, and a flat surface on the bottom, preventing interference with other parts and facilitating the connection of subsequent parts (such as the bottom guard plate 40 mentioned later).

[0051] Optionally, such as Figures 3-5 As shown, the cold plate connector 20 also includes a water temperature sensor 23 installed in the wall-penetrating connector 21. Two flow channels 211 are provided within the wall-penetrating connector 21 corresponding to the two water nozzles 22. Each flow channel 211 corresponds to a water temperature sensor 23, which is configured to measure the liquid temperature within the corresponding flow channel 211. It can be understood that a battery pack housing also includes a cold plate body 30, which is fixedly connected to the cold plate connector 20. The cold plate connector 20 has two flow channels 211, which are respectively connected to the liquid inlet and liquid outlet (not shown) of the cold plate body 30. The two flow channels 211 correspond to the liquid inlet and liquid outlet, respectively, and can monitor the inlet and outlet temperatures within the cold plate body 30 in real time. If the temperature difference between the two decreases, it indicates that the cold plate body 30 is malfunctioning and requires timely inspection and troubleshooting.

[0052] The battery pack housing provided in this embodiment, by adopting the aforementioned side beam assembly, facilitates the installation of the cold plate joint 20. No additional installation space is required in the front-to-back direction, ensuring that the expansion beam 50 inside the battery pack can be arranged closer to the side beam, thereby expanding the storage space of the battery module and increasing the battery pack's capacity.

[0053] Optionally, such as Figures 3-5 As shown, the through-wall connector 21 has a protruding mounting part 212 corresponding to each water temperature sensor 23. The interior of the mounting part 212 is connected to the corresponding flow channel 211. The water temperature sensor 23 is inserted into the mounting part 212 and fixed thereto. This configuration facilitates the installation of the water temperature sensor 23. Specifically, the water temperature sensor 23 is inserted so that its sensing end is located inside the flow channel 211, thereby allowing the measurement of the liquid temperature within the flow channel 211.

[0054] In an optional embodiment, the mounting portion 212 has two arc-shaped grooves 2121, and the water temperature sensor 23 has a retaining groove. The retaining spring 24 enters from the two arc-shaped grooves 2121 and engages with the retaining groove. The water temperature sensor 23 is fixed to the mounting portion 212 in the above manner. It only needs to be inserted, the height of the groove 231 and the retaining groove should be set to be the same, and then the retaining spring 24 can be installed. The installation is convenient and quick.

[0055] In another alternative embodiment, the water temperature sensor 23 can also be fixed to the mounting part 212 by brazing or bolting, which is not limited here.

[0056] Optionally, such as Figure 4 As shown, the through-wall connector 21 includes a through-wall portion 213 and two branch portions 214. At least part of the through-wall portion 213 is embedded in the mounting groove 111. Two water nozzles 22 are fixed to the outside of the through-wall portion 213. The bottom of the through-wall portion 213 is flush with the bottom side of the first side beam 11. The two branch portions 214 are connected to the inside of the through-wall portion 213 and are spaced apart along the first direction. Each branch portion 214 extends along the second direction. Each branch portion 214 is provided with a flow channel 211 and communicates with the corresponding water nozzle 22 through the through-wall portion 213. It is understood that the through-wall portion 213 has a certain thickness in the second direction, which is greater than the length of the mounting groove 111 in the second direction, to ensure that the through-wall portion 213 and the mounting groove 111 have the maximum contact area. At the same time, the arrangement of the two branches 214 reduces the weight of the cold plate joint 20, that is, the interval between the two branches 214 is cut out. In addition, when the branches 214 are connected to the cold plate body 30, since the branches 214 extend along the second direction, they can produce a small amount of deformation in the first direction to prevent a slight difference between the distance between the liquid inlet and liquid outlet of the cold plate body 30 and the distance between the two branches 214. It is understood that if the through-wall portion 213 is a whole block, then the end of the two flow channels 211 connected to the cold plate body 30 cannot be slightly adjusted compared to the solution in this embodiment.

[0057] Optionally, such as Figure 2As shown, the battery pack housing also includes a bottom protective plate 40 and a sealing strip. The bottom protective plate 40 has multiple through holes 41 and is threadedly connected to the lower side of the rectangular frame. The sealing strip is pasted onto the lower side of the bottom protective plate 40 and covers the through holes 41. Through the above configuration, the bottom protective plate 40 can protect the cold plate body 30. After being connected by screws, the sealing strip is used to seal the through holes 41, ensuring good sealing performance of the battery pack housing.

[0058] During installation, the cold plate connector 20 is first brazed to the cold plate body 30 (before brazing, the water nozzle 22 and the wall penetration part 213 can be welded together, and the water temperature sensor 23 can be installed in place) to form the cold plate assembly. The cold plate body 30 is then friction stirred welded to the enclosure plate 10 to integrate the cold plate assembly onto the battery pack housing. Finally, the gap between the wall penetration part 213 and the mounting groove 111 is welded to achieve the sealing of the housing.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A side beam assembly, characterized in that, include: The enclosure (10) includes a first side beam (11) extending along a first direction, and an installation groove (111) is provided on the lower side of the first side beam (11). The cold plate joint (20) is at least partially able to be inserted into the mounting groove (111) from bottom to top and fixedly connected to the first side beam (11).

2. The edge beam assembly according to claim 1, characterized in that, The cold plate joint (20) includes: The through-wall connector (21) extends along a second direction, which is perpendicular to the first direction; Both water taps (22) are fixedly connected to and communicate with the wall-penetrating connector (21). The two water taps (22) and the wall-penetrating connector (21) are either integrally formed or separately manufactured.

3. The edge beam assembly according to claim 2, characterized in that, The through-wall joint (21) is flush with the outer side of the first side beam (11) on the outer side in the second direction, and the lower side of the through-wall joint (21) is flush with the lower side of the first side beam (11).

4. The edge beam assembly according to claim 2, characterized in that, The cold plate connector (20) also includes a water temperature sensor (23) installed in the wall-penetrating connector (21). The wall-penetrating connector (21) has two flow channels (211) corresponding to the two water nozzles (22). Each flow channel (211) is provided with a water temperature sensor (23). The water temperature sensor (23) is configured to measure the liquid temperature in the corresponding flow channel (211).

5. The edge beam assembly according to claim 4, characterized in that, The through-wall connector (21) has a protruding mounting part (212) for each of the water temperature sensors (23). The interior of the mounting part (212) is connected to the corresponding flow channel (211). The water temperature sensor (23) is inserted into the mounting part (212) and fixed to the mounting part (212).

6. The edge beam assembly according to claim 5, characterized in that, The mounting part (212) has two arc-shaped grooves (2121), the water temperature sensor (23) has a slot, and the retaining spring (24) enters from the two arc-shaped grooves (2121) and engages with the slot.

7. The edge beam assembly according to claim 2, characterized in that, The through-wall connector (21) includes: The through-wall portion (213) is at least partially embedded in the mounting groove (111), and the two water nozzles (22) are fixed to the outside of the through-wall portion (213). The bottom of the through-wall portion (213) is flush with the bottom side of the first side beam (11). Two branches (214) are connected to the inner side of the through-wall portion (213) and are spaced apart along the first direction. Each branch (214) extends along the second direction. Each branch (214) is provided with a flow channel (211) and is connected to the corresponding water nozzle (22) through the through-wall portion (213).

8. The edge beam assembly according to any one of claims 1-7, characterized in that, The cold plate joint (20) and the mounting groove (111) are fixedly connected by welding.

9. A battery pack housing, characterized in that, include: The side beam assembly as described in any one of claims 1-8; The cold plate body (30) is fixedly connected to the cold plate connector (20). The cold plate connector (20) has two flow channels (211), which are respectively connected to the liquid inlet and liquid outlet of the cold plate body (30).

10. The battery pack housing according to claim 9, characterized in that, The enclosure (10) also includes a second side beam, a third side beam, and a fourth side beam that are connected end to end with the first side beam (11) to form a rectangular frame. The battery pack box also includes a bottom guard plate (40) and a sealing strip. The bottom guard plate (40) has multiple through holes (41) and is connected to the lower side of the rectangular frame by threads. The sealing strip is pasted on the lower side of the bottom guard plate (40) and covers the through holes (41).

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