Battery pack box body and battery pack

Abstract

The utility model discloses a battery pack box body and a battery pack, the battery pack box body comprises an edge beam and a cold plate, the edge beam and the cold plate enclose an accommodating area, and the accommodating area is suitable for placing a battery module; the cross beam is connected between the two edge beams and connected with the cold plate, the surface of one side of the cross beam in the thickness direction is attached to the end face of one end of the battery module, a first flow channel is formed in the cross beam, a second flow channel is formed in the cold plate, the first flow channel is communicated with the second flow channel, and the first flow channel is communicated with the second flow channel. And heat exchange liquid flows in the first flow channel and the second flow channel. According to the battery pack box body disclosed by the utility model, the first flow channel suitable for the flowing of the heat exchange liquid is formed in the cross beam, and the cross beam is matched with the cold plate, so that the rapid control on a temperature abnormal area is realized, the effective control on local temperature is ensured, the service life of the battery pack is prolonged, the safety and the reliability are improved, and the risk is reduced.

Description

Technical Field

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

[0002] Related technologies indicate that in the current context of energy scarcity, the new energy industry is experiencing explosive growth; new energy electric vehicles and energy storage devices have become mainstream; as the main power carrier for new energy vehicles and energy storage devices, battery pack thermal management is not only crucial to battery pack performance but also to the safety of electric vehicles and energy storage devices. A battery thermal management system can control the temperature of the battery cells, ensuring that different areas of the cells operate within a reasonable temperature environment, improving cell quality control and extending cell lifespan. Currently, liquid cooling plates, as the main components of the thermal management system, are used to cool and heat the battery cells, maintaining the battery temperature at a suitable level.

[0003] Currently, liquid cooling structures typically consist of upper and lower liquid cooling plates: the upper plate is mostly a flat plate used to support and place components such as battery cells, while the lower plate is usually a flat plate with flow channels. The flow channel cavity formed by the upper and lower plates is the path through which the working fluid flows, achieving the purpose of cooling and heating the battery cells. Most existing liquid cooling systems only have one inlet and outlet, and the liquid cooling system has only one closed loop. When the temperature of a local battery cell or module changes drastically, the single-loop liquid cooling system cannot quickly and effectively control the local temperature. The operation of a local battery cell at abnormal temperatures will seriously affect its electrochemical performance and pose a great safety hazard. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a battery pack housing that can quickly and effectively control abnormal temperature areas inside the battery pack.

[0005] This utility model also proposes a battery pack having the above-mentioned battery pack housing.

[0006] According to a first aspect of the present invention, a battery pack housing includes: side beams and a cold plate, the side beams and the cold plate forming an accommodating area, the accommodating area being suitable for placing a battery module; a crossbeam connecting two of the side beams and connected to the cold plate, one side surface of the crossbeam in the thickness direction being abutted against one end face of the battery module, a first flow channel being formed in the crossbeam, and a second flow channel being formed in the cold plate, the first flow channel and the second flow channel being connected, and heat exchange liquid flowing within the first flow channel and the second flow channel.

[0007] According to the battery pack box body of the present utility model, by forming a first flow channel suitable for the flow of heat exchange liquid inside the cross beam, and the cooperation of the cross beam and the cold plate, rapid control of the temperature abnormal area is achieved, effective control of the local temperature is ensured, the electrochemical performance of the battery module is not affected, the service life of the battery pack is extended, the safety and reliability are improved, and the risk is reduced.

[0008] In some embodiments, a first water inlet and a first water outlet are formed on the cross beam, the first water inlet is communicated with one end of the first flow channel, the first water outlet is communicated with the other end of the first flow channel, a second water inlet and a second water outlet are formed on the cold plate, the second water outlet is communicated with one end of the second flow channel, the second water inlet is communicated with the other end of the second flow channel, and moreover, the first water inlet is communicated with the second water outlet, and the first water outlet is communicated with the second water inlet.

[0009] In some embodiments, there are multiple first flow channels, and the multiple first flow channels are arranged along the width direction of the cross beam and are communicated with each other.

[0010] In some embodiments, the cross beam forms a water inlet flow channel and a water outlet flow channel, the water inlet flow channel is communicated with the first water inlet, each first flow channel is connected between the water inlet flow channel and the water outlet flow channel, and each first flow channel is communicated with the water inlet flow channel, and each first flow channel is communicated with the water outlet flow channel.

[0011] In some embodiments, the battery pack box body further includes: a seal, and the seal is arranged at the ends of both ends of the first flow channel.

[0012] In some embodiments, the radius dimension of the first flow channel is 2 mm - 5 mm.

[0013] In some embodiments, the cross beam is formed as an aluminum part.

[0014] In some embodiments, the cross beam and the cold plate are connected by welding, and / or, the cross beam and the cold plate are adhesively connected by structural adhesive.

[0015] In some embodiments, the battery pack box body further includes: a temperature control module, and the temperature control module is used to control the temperature inside the battery pack box body.

[0016] The battery pack according to the second aspect of the present utility model includes the battery pack box body according to the first aspect of the present utility model above.

[0017] According to the battery pack of the present utility model, by providing the battery pack box body of the first aspect above, the electrochemical performance of the battery pack is improved, the service life of the battery pack is extended, the safety and reliability are improved, and the risk is reduced.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A partial schematic diagram of the battery pack shown;

[0021] Figure 3 yes Figure 2 A partial schematic diagram of the beam shown.

[0022] Figure label:

[0023] 100. Battery pack; 10. Battery pack housing; 1. Side beam; 2. Cold plate; 3. Crossbeam; 31. First flow channel; 32. First water inlet; 33. First water outlet; 4. Battery module; 5. Sealing component. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] The following is for reference. Figures 1-3 The battery pack housing 10 according to a first aspect embodiment of the present invention is described.

[0026] like Figures 1-3 As shown, the battery pack housing 10 according to the first aspect of the present invention includes: a side beam 1, a cold plate 2, and a crossbeam 3.

[0027] Specifically, the side beam 1 and the cold plate 2 together form a receiving area, which is suitable for placing the battery module 4. The crossbeam 3 connects the two side beams 1 and is connected to the cold plate 2. One side surface of the crossbeam 3 in the thickness direction is attached to one end face of the battery module 4. A first flow channel 31 is formed in the crossbeam 3, and a second flow channel is formed in the cold plate 2. The first flow channel 31 and the second flow channel are connected. The first flow channel 31 and the second flow channel are suitable for the flow of heat exchange liquid.

[0028] In other words, the housing area is defined by the side beam 1 and the cold plate 2. The battery module 4 is placed in the housing area. The side beam 1 not only provides structural support but also protects the internal components and the battery module 4 from external impacts. The cold plate 2 is generally located below the battery module 4 and is used to regulate the internal temperature of the battery pack 100. The heat exchange liquid flows through the second flow channel formed inside, thereby removing the heat generated by the battery module 4 during operation, or providing heat to the battery module 4 when the temperature is low, ensuring that the battery module 4 is within the indicated operating temperature range, improving the efficiency of the battery pack 100 and extending its service life. The crossbeam 3 helps to better fix the position of the battery module 4. A first flow channel 31 is formed in the crossbeam 3, which, together with the cold plate 2, further enhances the temperature regulation performance of the battery pack 100.

[0029] Understandably, when an abnormal local temperature occurs within the battery pack 100, heat exchange fluid is supplied to the adjacent crossbeam 3, working in conjunction with the cold plate 2 to quickly control the area with abnormal temperature, ensuring rapid and effective control of the local temperature and reducing the risk.

[0030] According to the embodiment of the present invention, the battery pack housing 10 forms a first flow channel 31 suitable for the flow of heat exchange liquid in the crossbeam 3. The crossbeam 3 cooperates with the cold plate 2 to achieve rapid control of the temperature abnormal area, ensure effective control of local temperature, not affect the electrochemical performance of the battery module 4, extend the service life of the battery pack 100, improve safety and reliability, and reduce risks.

[0031] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, a first inlet 32 ​​and a first outlet 33 are formed on the crossbeam 3. The first inlet 32 ​​is connected to one end of the first flow channel 31, and the first outlet 33 is connected to the other end of the first flow channel 31. A second inlet and a second outlet are formed on the cold plate 2. The second outlet is connected to one end of the second flow channel, and the second inlet is connected to the other end of the second flow channel. Furthermore, the first inlet 32 ​​is connected to the second outlet, and the first outlet 33 is connected to the second inlet. In other words, one end of the first flow channel 31 and one end of the second flow channel are connected through the second outlet and the first inlet 32. The heat exchange liquid in the cold plate 2 enters the first inlet 32 ​​from the second flow channel through the second outlet and then enters the first flow channel 31. The other end of the first flow channel 31 and the other end of the second flow channel are connected through the first outlet 33 and the second inlet. The heat exchange liquid in the crossbeam 3 enters the second inlet from the first flow channel 31 through the first outlet 33 and then enters the second flow channel. This effectively covers different parts of battery module 4, improving heat dissipation efficiency.

[0032] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the first flow channel 31 includes multiple channels, which are arranged and connected along the width direction of the crossbeam 3. It can be understood that the multiple first flow channels 31 improve the efficiency of heat exchange, ensure a more uniform temperature distribution, reduce the impact on the electrochemical performance of the battery module 4, and enhance the structural strength of the crossbeam 3 itself, thereby enhancing the structural strength of the battery pack housing 10.

[0033] In some embodiments of this utility model, the crossbeam 3 forms an inlet channel and an outlet channel. The inlet channel is connected to the first inlet 32. Each first channel 31 is connected between the inlet channel and the outlet channel, and each first channel 31 is connected to both the inlet channel and the outlet channel. It is understood that the first channels 31 are arranged in parallel, allowing the heat exchange liquid to be evenly distributed to each first channel 31 through the inlet channel. This ensures a more uniform temperature distribution throughout the entire crossbeam 3 area, enhances the heat exchange effect, and improves the overall heat exchange efficiency. Compared to series arrangement, the parallel arrangement reduces the resistance during the flow of the heat exchange liquid and lowers the workload of the pumping system in pumping the heat exchange liquid.

[0034] In some embodiments of this utility model, such as Figure 3 As shown, the battery pack housing 10 also includes a sealing element 5, which is disposed at the ends of both ends of the first flow channel 31. Therefore, the sealing element 5 can effectively prevent the heat exchange liquid from leaking out from the ends of the first flow channel 31, significantly improving the reliability and stability of temperature control inside the battery pack housing 10, extending the service life of the battery pack 100, and enhancing the safety of the battery pack 100.

[0035] Optionally, the seal 5 can be an O-ring, gasket, rubber sealing strip, etc.

[0036] To ensure heat exchange efficiency and avoid increasing flow resistance, the radius of the first flow channel 31 is 2mm-5mm. For example, the radius of the first flow channel 31 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.

[0037] Because aluminum has low density, high strength, good thermal conductivity, good corrosion resistance, and is easy to process, the crossbeam 3 is formed as an aluminum component.

[0038] In some embodiments of this invention, the crossbeam 3 and the cold plate 2 are welded together, and / or the crossbeam 3 and the cold plate 2 are bonded together with structural adhesive. Preferably, the crossbeam 3 and the cold plate 2 are welded together, and the crossbeam 3 and the cold plate 2 are bonded together with structural adhesive that has thermal conductivity. This results in high connection strength and good stability, further improving the temperature transfer efficiency between the crossbeam 3 and the cold plate 2. The structural adhesive also has a sealing effect, preventing corrosion or damage at the weld.

[0039] In some embodiments of this utility model, the battery pack housing 10 further includes a temperature control module, which is used to control the temperature inside the battery pack housing 10, monitor and adjust the operating temperature of the battery module 4, so as to ensure that the battery operates within the optimal operating temperature range, which helps to improve the performance and life of the battery pack 100 and enhance the safety and reliability of the entire battery pack 100.

[0040] The battery pack 100 according to a second aspect embodiment of the present invention includes the battery pack housing 10 according to the first aspect embodiment of the present invention.

[0041] According to the battery pack 100 of the present utility model embodiment, by providing the battery pack housing 10 of the first aspect embodiment described above, the electrochemical performance of the battery pack 100 is improved, the service life of the battery pack 100 is extended, the safety and reliability are enhanced, and the risk is reduced.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication 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 according to the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack housing, characterized in that, include: Side beams and cold plates, the side beams and cold plates together forming a receiving area, the receiving area being suitable for placing battery modules; A crossbeam connects the two side beams and is connected to the cold plate. One side surface of the crossbeam in the thickness direction is in contact with one end face of the battery module. A first flow channel is formed in the crossbeam, and a second flow channel is formed in the cold plate. The first flow channel and the second flow channel are connected. The first flow channel and the second flow channel are suitable for the flow of heat exchange liquid.

2. The battery pack housing according to claim 1, characterized in that, A first inlet and a first outlet are formed on the crossbeam. The first inlet is connected to one end of the first flow channel, and the first outlet is connected to the other end of the first flow channel. A second inlet and a second outlet are formed on the cold plate. The second outlet is connected to one end of the second flow channel, and the second inlet is connected to the other end of the second flow channel. Furthermore, the first inlet is connected to the second outlet, and the first outlet is connected to the second inlet.

3. The battery pack housing according to claim 2, characterized in that, The first flow channel includes multiple channels, which are arranged and connected along the width direction of the crossbeam.

4. The battery pack housing according to claim 3, characterized in that, The crossbeam has an inlet channel and an outlet channel. The inlet channel is connected to the first inlet. Each first channel is connected between the inlet channel and the outlet channel, and each first channel is connected to the inlet channel and the outlet channel.

5. The battery pack housing according to claim 4, characterized in that, Also includes: A sealing element is disposed at the ends of both ends of the first flow channel.

6. The battery pack housing according to claim 4, characterized in that, The radius of the first flow channel is 2mm-5mm.

7. The battery pack housing according to any one of claims 1-6, characterized in that, The crossbeam is formed of aluminum.

8. The battery pack housing according to any one of claims 1-6, characterized in that, The crossbeam is welded to the cold plate, and / or the crossbeam is bonded to the cold plate with structural adhesive.

9. The battery pack housing according to any one of claims 1-6, characterized in that, Also includes: A temperature control module is used to control the temperature inside the battery pack housing.

10. A battery pack, characterized in that, The battery pack housing includes any one of claims 1-9.

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