Irregular structure battery pack

Abstract

This utility model discloses an irregularly structured battery pack, including a single-layer battery pack and a double-layer battery pack. The double-layer battery pack includes a first battery pack, a second battery pack, and a double-layer temperature regulating plate for regulating the temperature of both. The double-layer temperature regulating plate includes a first flow channel for regulating the temperature of the first battery pack and a second flow channel for regulating the temperature of the second battery pack. The outlet of the first flow channel is connected to the inlet of the second flow channel. The beneficial effects of this utility model are: by using an irregularly shaped battery pack, the vehicle space can be fully utilized, and the battery pack can be flexibly arranged according to space changes, thereby increasing the battery capacity and improving the vehicle's range; the internal frame layout of the battery pack is reasonable, with the first and second battery packs installed in the same inner cavity of the battery pack, improving the integration of the upper and lower structures, increasing structural strength, reducing the space occupied inside the battery pack, and improving space utilization.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an irregularly structured battery pack. Background Technology

[0002] Currently, most power batteries for new energy vehicles adopt a "flat" single-layer structure. However, the available space in the vehicle is irregular, and a single-layer battery pack cannot fully utilize the vehicle's space. Previous projects used multiple independent single-layer battery packs connected together, but the added box structure components occupied space. Space also needed to be reserved between independent battery packs for assembly and wiring, reducing the overall space utilization of the vehicle. Furthermore, the connection harnesses between independent battery packs significantly increased the cost of the wiring harnesses. Alternatively, a two-layer structure with a raised upper layer was used to utilize the upper space, but the space below the battery box could not be utilized. Moreover, the double-layer battery pack with a raised upper layer had a single-layer frame for the main body of the box, and the addition of an internal frame to achieve the two-layer structure occupied a certain amount of space, reducing the internal space utilization of the battery system.

[0003] In existing dual-layer battery packs, the liquid cooling plate is mostly placed at the bottom of the battery, with the upper and lower layers using their own liquid cooling plates. The height difference between the liquid cooling plates increases the flow resistance of the thermal management system, resulting in a large temperature difference between the upper and lower layers of the battery, which affects battery performance and lifespan.

[0004] The patent application number "CN202021615149.8" discloses "a liquid cooling plate, a battery liquid cooling system and a vehicle having the battery liquid cooling system". Although it provides a solution for using the same liquid cooling plate for the upper and lower battery layers, the liquid cooling plate is a single-layer flow channel design. One liquid cooling plate simultaneously regulates the temperature of the upper and lower battery layers, resulting in poor thermal management. Utility Model Content

[0005] The purpose of this utility model is to propose an irregularly structured battery pack that makes full use of the vehicle's layout space, especially the space under the battery box, to increase battery capacity and the vehicle's pure electric range.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An irregularly structured battery pack includes a single-layer battery pack and a double-layer battery pack. The double-layer battery pack includes a first battery pack, a second battery pack, and a double-layer temperature regulating plate for regulating the temperature of the two. The double-layer temperature regulating plate includes a first flow channel for regulating the temperature of the first battery pack and a second flow channel for regulating the temperature of the second battery pack.

[0008] Preferably, the outlet of the first flow channel is connected to the inlet of the second flow channel.

[0009] Preferably, the double-layer temperature regulating plate includes a second support plate, and a first support plate and a third support plate are respectively provided on both sides of the second support plate. The first flow channel is provided between the second support plate and the first support plate, and the second flow channel is provided between the second support plate and the third support plate.

[0010] The first battery pack is positioned above the first support plate, and the second battery pack is positioned below the third support plate.

[0011] Preferably, a first flow channel plate is provided between the second support plate and the first support plate, and a sealed first flow channel is formed between the first flow channel plate and the first support plate;

[0012] A second flow channel plate is provided between the second support plate and the third support plate, and a sealed second flow channel is formed between the second flow channel plate and the third support plate.

[0013] Preferably, the second support plate is provided with a flow channel adapter connecting the first flow channel and the second flow channel, the first support plate is provided with a liquid inlet connector connecting the first flow channel, and the third support plate is provided with a liquid outlet connector connecting the second flow channel.

[0014] Preferably, the single-layer battery pack includes a third battery group and a single-layer temperature regulating plate for regulating its temperature.

[0015] Preferably, it also includes a battery box, wherein the battery box is provided with a first inner cavity for accommodating a double-layer battery pack and a second inner cavity for accommodating a single-layer battery pack.

[0016] Preferably, the battery box is provided with a cover on top and a fixing seat on the side wall of the battery box.

[0017] Preferably, the battery box has an inlet hole and an outlet hole.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. By using irregularly shaped battery packs, the vehicle space can be fully utilized, and the battery packs can be flexibly arranged according to changes in space, thereby increasing battery capacity and improving vehicle range.

[0020] 2. The internal frame layout of the battery box is reasonable. The first and second battery packs are installed in the same inner cavity of the battery box, which improves the integrity of the upper and lower structure, increases the structural strength, reduces the space occupied inside the battery box, and improves the space utilization rate.

[0021] 3. The first and second battery packs share a single cold plate (i.e., a double-layer temperature regulating plate). The double-layer temperature regulating plate has two layers of flow channels, which provide heating / cooling for the two battery packs respectively. Compared with traditional upper and lower layer distributed cold plates, it can reduce the number of pipes and save space. Compared with an integrated single-layer flow channel cold plate, it can improve the thermal management effect and improve the temperature consistency of the batteries.

[0022] 4. The first and second flow channels are connected end to end by internal pipes, eliminating the need for the connecting joints and pipes between the upper and lower cold plates of the traditional double-layer cold plate, reducing the number of parts, saving internal space of the battery system, and improving the energy density of the battery system; in addition, it can also simplify the assembly process and improve production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application;

[0024] Figure 2 This is a structural schematic diagram from another angle of this application;

[0025] Figure 3 This is a schematic diagram of the battery box structure of this application;

[0026] Figure 4 This is a structural schematic diagram of the hidden box cover in this application;

[0027] Figure 5 This is a structural diagram of the concealed cover and battery box of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the double-layer temperature regulating plate of this application;

[0029] Figure 7 This is an exploded view of the double-layer temperature-regulating plate of this application.

[0030] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0031] The present invention will now be further described with reference to the accompanying drawings.

[0032] Example 1

[0033] like Figure 4 — Figure 7As shown, this embodiment of an irregularly structured battery pack includes a single-layer battery pack and a double-layer battery pack. The double-layer battery pack includes a first battery pack 21, a second battery pack 23, and a double-layer temperature regulating plate 22 for regulating the temperature of both. The double-layer temperature regulating plate 22 includes a first flow channel for regulating the temperature of the first battery pack 21 and a second flow channel for regulating the temperature of the second battery pack 23. The first and second flow channels are filled with a temperature regulating medium (generally a liquid medium). A power device (pump) for driving the flow of this medium and a temperature regulating device for heating / cooling the medium are installed inside the vehicle. When the battery pack needs to be heated, the medium is heated; when the battery pack needs to be cooled, the medium is cooled. Then, the power device drives the medium to circulate, thereby achieving temperature regulation of the battery pack.

[0034] The outlet of the first flow channel is connected to the inlet of the second flow channel. The medium circulates sequentially along the first and second flow channels to cool the first battery pack 21 and the second battery pack 23.

[0035] like Figure 6 and Figure 7 As shown, the double-layer temperature regulating plate 22 includes a second support plate 43, and a first support plate 41 and a third support plate 45 are respectively arranged on both sides of the second support plate 43. A first flow channel is arranged between the second support plate 43 and the first support plate 41, and a second flow channel is arranged between the second support plate 43 and the third support plate 45.

[0036] The first battery pack 21 is positioned above the first support plate 41, and the second battery pack 23 is positioned below the third support plate 45.

[0037] A first flow channel plate 42 is provided between the second support plate 43 and the first support plate 41, and a sealed first flow channel is formed between the first flow channel plate 42 and the first support plate 41.

[0038] A second flow channel plate 44 is provided between the second support plate 43 and the third support plate 45, and a sealed second flow channel is formed between the second flow channel plate 44 and the third support plate 45.

[0039] The second support plate 43 has a flow channel adapter 48 that connects the first flow channel and the second flow channel, the first support plate 41 has a liquid inlet connector 46 that connects to the first flow channel, and the third support plate 45 has a liquid outlet connector 47 that connects to the second flow channel.

[0040] In this embodiment, the first support plate 41, as a heat exchange interface, directly contacts the first battery pack 21, and heat exchange is carried out using the first flow channel; similarly, the third support plate 45 contacts the second battery pack 23, and heat exchange is carried out using the second flow channel; the second support plate 43 is used to separate the first and second flow channels, and serves as the main support surface to improve the overall strength of the double-layer temperature regulating plate 22. To reduce the flow resistance of the double-layer temperature regulating plate 22, the liquid inlet connector 46 is connected to the first flow channel, and the liquid outlet connector 47 is connected to the second flow channel. The first and second flow channels are connected end to end through an internal channel; the flow path of the cooling medium is: liquid inlet connector 46—first flow channel—flow channel adapter 48—second flow channel—liquid outlet connector 47, with the entire flow direction being from top to bottom, further reducing the internal flow resistance.

[0041] The single-layer battery pack includes a third battery group 31 and a single-layer temperature regulating plate 32 for regulating its temperature. Similar to the double-layer temperature regulating plate 22, the single-layer temperature regulating plate 32 only needs to be provided with one flow channel. The single-layer temperature regulating plate 32 only needs to be composed of a first support plate 41, a second support plate 43, and a first flow channel plate 42. The medium in the flow channel can regulate the temperature of the third battery group 31. The difference from the double-layer temperature regulating plate 22 is that the second support plate 43 does not have a flow channel adapter 48, but instead has a liquid outlet connector 47.

[0042] like Figure 1 — Figure 3 As shown, this embodiment also includes a battery box 1, which has a first inner cavity 12 for accommodating a double-layer battery pack and a second inner cavity 13 for accommodating a single-layer battery pack.

[0043] The battery box can be manufactured by welding aluminum profiles or by using a one-piece die-cast aluminum box. The internal frame and border arrangement of the battery box are consistent with the material and manufacturing method of the box.

[0044] A cover 11 is provided on the top of the battery box 1, and a fixing seat 14 is provided on the side wall of the battery box 1.

[0045] The battery box 1 has an inlet hole (not shown in the figure) and an outlet hole (not shown in the figure). In this embodiment, there are two inlets, corresponding to the inlet connector 46 of the double-layer temperature control plate 22 and the inlet connector of the single-layer temperature control plate 32, respectively; there are also two outlet holes, corresponding to the outlet connector 47 of the double-layer temperature control plate 22 and the outlet connector of the single-layer temperature control plate 32, respectively.

[0046] In this embodiment, for ease of demonstration, only one single-layer battery pack and one double-layer battery pack are provided in the battery box 1 (and the arrangement direction is downward protruding). In other embodiments, depending on the specific space design of the vehicle body, multiple single-layer battery packs or multiple double-layer battery packs can be arranged, and the arrangement direction of the double-layer battery pack can also be upward protruding.

[0047] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, 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 limiting the scope of protection of this utility model.

[0049] If the terms “A”, “B”, “first”, “second”, etc. are used in this document to define the components, those skilled in the art should know that the use of “A”, “B”, “first”, “second” is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An irregularly structured battery pack, comprising a single-layer battery pack and a double-layer battery pack, characterized in that: The dual-layer battery pack includes a first battery pack, a second battery pack, and a dual-layer temperature regulating plate for regulating the temperature of both. The dual-layer temperature regulating plate includes a first flow channel for regulating the temperature of the first battery pack and a second flow channel for regulating the temperature of the second battery pack.

2. The irregular structure battery pack according to claim 1, characterized in that, The outlet of the first flow channel is connected to the inlet of the second flow channel.

3. The irregular structure battery pack according to claim 2, characterized in that, The double-layer temperature regulating plate includes a second support plate, and a first support plate and a third support plate are respectively arranged on both sides of the second support plate. The first flow channel is arranged between the second support plate and the first support plate, and the second flow channel is arranged between the second support plate and the third support plate. The first battery pack is positioned above the first support plate, and the second battery pack is positioned below the third support plate.

4. The irregular structure battery pack according to claim 3, characterized in that, A first flow channel plate is provided between the second support plate and the first support plate, and a sealed first flow channel is formed between the first flow channel plate and the first support plate; A second flow channel plate is provided between the second support plate and the third support plate, and a sealed second flow channel is formed between the second flow channel plate and the third support plate.

5. An irregularly structured battery pack according to claim 3, characterized in that, The second support plate is provided with a flow channel adapter connecting the first flow channel and the second flow channel, the first support plate is provided with a liquid inlet connector connecting the first flow channel, and the third support plate is provided with a liquid outlet connector connecting the second flow channel.

6. The irregular structure battery pack according to claim 1, characterized in that, The single-layer battery pack includes a third battery group and a single-layer temperature regulating plate for regulating its temperature.

7. An irregularly structured battery pack according to claim 1, characterized in that, It also includes a battery box, which has a first inner cavity for accommodating a double-layer battery pack and a second inner cavity for accommodating a single-layer battery pack.

8. An irregularly structured battery pack according to claim 7, characterized in that, The battery box is provided with a cover on top and a fixing seat on the side wall of the battery box.

9. An irregularly structured battery pack according to claim 7, characterized in that, The battery box is provided with an inlet and an outlet.

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