Battery system and electric equipment

Abstract

The embodiment of the utility model provides a battery system and electric equipment, and relates to the technical field of batteries, and the battery system comprises a battery cell group which comprises a plurality of sub battery cell groups which are distributed at intervals; the plurality of cooling plates are arranged, at least one cooling plate is arranged between every two adjacent sub battery cell groups, and the cooling plates are in contact with the sub battery cell groups; the cooling plate is provided with an avoiding part, and the avoiding part is used for providing a deformation space for the sub battery cell group. According to the battery system and the electric equipment provided by the embodiment of the invention, the problem of relatively poor cooling effect of the battery cell group in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery system and electrical device. Background Technology

[0002] Batteries are an important component of new energy vehicles, and as people have higher and higher requirements for travel quality, high-rate charge and discharge performance has attracted much attention from users.

[0003] In related technologies, the battery includes a cell pack and a cooling plate attached to one side of the cell pack to dissipate heat from the cells during use.

[0004] However, when the battery is operating at high charge and discharge rates (i.e., fast charging and fast discharging), the heat generated by the battery cells increases, making it difficult for the cooling plate to meet the cooling requirements of the battery cells, resulting in poor cooling performance of the battery cells. Utility Model Content

[0005] This application provides a battery system and electrical device to solve the problem of poor cooling effect of battery cell packs in the prior art.

[0006] On one hand, embodiments of this application provide a battery system, including:

[0007] A battery cell assembly, comprising multiple spaced-apart sub-cell assemblies;

[0008] A cooling plate is provided, wherein multiple cooling plates are provided, and at least one cooling plate is provided between two adjacent sub-cell groups, and the cooling plate is in contact with the sub-cell group;

[0009] The cooling plate has a clearance portion, which provides deformation space for the sub-cell assembly.

[0010] In one possible implementation, a plurality of thermal pads are also included, the thermal pads being located between the cooling plate and the sub-cell assembly, such that the cooling plate contacts the sub-cell assembly through the thermal pads.

[0011] In one possible implementation, the thermal pad layer is an elastic thermally conductive adhesive layer.

[0012] In one possible implementation, it also includes at least two liquid cooling pipes, each of the cooling plates having a liquid cooling channel inside;

[0013] At least one of the liquid cooling pipes is connected to one end of each of the liquid cooling channels in the extending direction, and at least one of the liquid cooling pipes is connected to the other end of each of the liquid cooling channels in the extending direction.

[0014] In one possible implementation, the liquid cooling pipe includes a plurality of connectors and a plurality of connecting pipes, each connector being disposed on a corresponding cooling plate, the interior of each connector being connected to the liquid cooling channel, and the connecting pipes connecting the interiors of two adjacent connectors.

[0015] In one possible implementation, the connector includes a main tube disposed on the cooling plate, the interior of the main tube being connected to the liquid cooling channel;

[0016] The main tube is provided with a tube plug for connecting with the connecting tube, and the interior of the tube plug is connected to the interior of the main tube.

[0017] In one possible implementation, the cooling plate includes at least one infusion tube and at least one pair of clamps, the infusion tube being located between the two clamps of the same pair, the interior of the infusion tube communicating with the interior of the connector, and the interior of the infusion tube forming the liquid cooling channel.

[0018] In one possible implementation, the infusion tube has at least one baffle that divides the liquid cooling channel into multiple sub-liquid cooling channels, which are distributed along the width direction of the infusion tube.

[0019] The diameter of the sub-liquid cooling channel increases towards the center of the sub-cell assembly.

[0020] In one possible implementation, the cooling plate has two infusion tubes, and the gap between the two infusion tubes forms the clearance portion, which corresponds to the middle of the sub-cell assembly.

[0021] On the other hand, embodiments of this application provide an electrical device including the battery system described in any of the above embodiments.

[0022] This application provides a battery system and electrical device. The battery system includes: a cell pack, which comprises multiple spaced sub-cell packs; multiple cooling plates, with at least one cooling plate positioned between adjacent sub-cell packs, and the cooling plates contacting the sub-cell packs; the cooling plates have clearance portions that provide deformation space for the sub-cell packs. Therefore, multiple cooling plates can simultaneously cool each sub-cell pack at different locations, greatly improving the overall cooling efficiency of the cell pack and solving the problem of poor cooling effect in the prior art. Furthermore, during operation, the clearance portions provide deformation space for the sub-cell packs to absorb internal stress (i.e., expansion force), reducing damage to the internal materials of the sub-cell packs and extending their service life. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] Figure 1 This application provides an exploded structural diagram of a battery system.

[0025] Figure 2 for Figure 1 Exploded view of the intermediate cooling plate;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure of the infusion tube.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-cell pack;

[0029] 200 - Cooling plate; 210 - Infusion tube; 211 - Gap; 212 - Partition; 220 - Clamping plate;

[0030] 300 - Thermal pad;

[0031] 400 - Liquid cooling pipe; 410 - Fitting; 411 - Main pipe; 412 - Pipe plug; 413 - Plug; 420 - Connecting pipe.

[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0034] In related technologies, a battery includes a cell pack and a cooling plate attached to one side of the cell pack. The cell pack includes multiple interconnected cells, which are usually distributed on the upper surface of the cooling plate to dissipate heat from the cells during use.

[0035] However, when the battery cells are operating at high charge and discharge rates (i.e., fast charging and fast discharging), the heat generated by the cells increases, making it difficult for the cooling plate to meet the cooling requirements of the cells. This results in low cooling efficiency for the battery cell assembly, leading to poor cooling performance and consequently affecting the lifespan of the battery cell assembly.

[0036] Therefore, this application provides a battery system and electrical device. The battery system includes: a cell pack, which includes multiple spaced sub-cell packs; a cooling plate, which has multiple cooling plates, with at least one cooling plate between two adjacent sub-cell packs, and the cooling plate is in contact with the sub-cell pack; the cooling plate has a clearance portion for providing deformation space for the sub-cell packs. Thus, multiple cooling plates can simultaneously cool each sub-cell pack at different locations, greatly improving the overall cooling efficiency of the cell pack and solving the problem of poor cooling effect of cell packs in the prior art. Furthermore, during operation, the clearance portion provides deformation space for the sub-cell packs to absorb internal stress (i.e., expansion force), reducing damage to the internal materials of the sub-cell packs caused by internal stress and extending the service life of the sub-cell packs.

[0037] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0038] like Figure 1 As shown in the embodiment of this application, a battery system includes:

[0039] A battery cell assembly, comprising multiple spaced sub-cell assemblies 100;

[0040] A cooling plate 200 is provided, and multiple cooling plates 200 are provided. At least one cooling plate 200 is provided between two adjacent sub-cell groups 100, and the cooling plate 200 is in contact with the sub-cell group 100.

[0041] The cooling plate 200 has a clearance portion, which provides deformation space for the battery cell assembly 100.

[0042] In this embodiment, multiple sub-cell groups 100 are provided, and the multiple sub-cell groups 100 are distributed sequentially at intervals along their width direction. It should be noted that multiple sequentially arranged cells form a sub-cell group 100, and the cells can be interconnected by bonding, welding or other methods, and the number of cells is not limited.

[0043] Meanwhile, multiple cooling plates 200 are provided, with one cooling plate 200 between each two adjacent sub-cell groups 100, and another cooling plate 200 on each side of the two sub-cell groups 100 located at opposite ends of the distribution direction. The cooling plate 200 is in contact with the adjacent sub-cell group 100, and the extending direction of the cooling plate 200 is consistent with the extending direction of the sub-cell group 100, so as to achieve the purpose of cooling the sub-cell group 100.

[0044] In other embodiments, two or more cooling plates 200 may be provided between two adjacent sub-cell groups 100, and there is no limitation on this.

[0045] In use, the staggered distribution of the sub-cell groups 100 and the cooling plates 200 greatly increases the contact area between the entire cell group and the cooling plates 200 (i.e., increases the cooling area). This allows multiple cooling plates 200 to simultaneously cool each sub-cell group 100 at different locations, significantly improving the overall cooling efficiency of the cell group and solving the problem of poor cooling effect in existing cell groups. In addition, during operation, the clearance portion provides deformation space for the sub-cell groups 100 to absorb the internal stress (i.e., expansion force) of the sub-cell groups 100, reducing the damage of the internal stress of the sub-cell groups 100 to the internal materials of the sub-cell groups 100 and extending the service life of the sub-cell groups 100.

[0046] In practice, each sub-cell group 100 and each cooling plate 200 can be installed in the same housing to form a battery assembly.

[0047] In some embodiments, such as Figure 1 As shown, the battery system also includes multiple thermal pads 300, which are located between the cooling plate 200 and the sub-cell assembly 100, so that the cooling plate 200 contacts the sub-cell assembly 100 through the thermal pads 300.

[0048] Therefore, when the sub-cell assembly 100 generates heat, the thermal pad layer 300 helps to achieve a uniform temperature distribution on the surface of the sub-cell assembly 100, reducing the possibility of localized overheating. Secondly, the thermal pad layer 300 can effectively conduct the heat generated by the sub-cell assembly 100 to the cooling plate 200, improving heat dissipation efficiency.

[0049] Furthermore, the thermally conductive pad layer 300 is an elastic thermally conductive adhesive layer. In practice, the thermally conductive adhesive layer can be laid on the side surface of the cooling plate 200, or it can be placed on the sub-cell assembly 100. This allows the thermally conductive pad layer 300 to not only have better thermal conductivity, but also absorb the expansion force of the sub-cell assembly 100 through compression, resulting in even better performance.

[0050] In some embodiments, such as Figure 1As shown, the battery system also includes at least two liquid cooling pipes 400, and each cooling plate 200 has a liquid cooling channel inside;

[0051] At least one liquid cooling pipe 400 is connected to one end of each liquid cooling channel in the extension direction, and at least one liquid cooling pipe 400 is connected to the other end of each liquid cooling channel in the extension direction.

[0052] In this embodiment, two liquid cooling pipes 400 are provided, and are respectively located on both sides of multiple cooling plates 200, so that multiple cooling plates 200 are all located between the two liquid cooling pipes 400, and the liquid cooling pipes 400 extend along the distribution direction of multiple cooling plates 200.

[0053] Secondly, the cooling plate 200 has internal liquid cooling channels, the extension direction of which is consistent with the extension direction of the cooling plate 200. One end of the extending direction of the cooling plate 200 is connected to one of the liquid cooling pipes 400, so that the liquid cooling channel is connected to the liquid cooling pipe 400; the other end of the extending direction of the cooling plate 200 is connected to another liquid cooling pipe 400, so that the liquid cooling channel is connected to the liquid cooling pipe 400. Thus, the liquid cooling pipes 400 are simultaneously connected to the liquid cooling channels in each cooling plate 200.

[0054] In implementation, one liquid cooling pipe 400 can be used as the inlet pipe and the other as the outlet pipe. During use, coolant (such as water or refrigerant) is simply introduced into the inlet pipe. The coolant flows through multiple cooling plates 200 and exits through the outlet pipe, thus allowing each cooling plate 200 to simultaneously cool the sub-cell assembly 100. Furthermore, the parallel connection of each liquid cooling channel effectively reduces the flow resistance of the coolant.

[0055] In other embodiments, other numbers of liquid cooling pipes 400 may be provided on the cooling plate 200, and there is no limitation thereto. In addition, the cooling plate 200 may be a plate made of thermally conductive material, and heat dissipation fins may be added to the cooling plate 200, while a cooling fan is used to cool the heat dissipation fins on the cooling plate 200.

[0056] Furthermore, such as Figure 1 and Figure 2 As shown, the liquid cooling pipe 400 includes multiple connectors 410 and multiple connecting pipes 420. Each connector 410 is correspondingly disposed on each cooling plate 200. The interior of the connector 410 is connected to the liquid cooling channel, and the connecting pipe 420 connects the interiors of two adjacent connectors 410.

[0057] The connector 410 is hollow inside and is connected to the end of the cooling plate 200, so that the liquid cooling channel inside the cooling plate 200 is connected to the interior of the connector 410. Then, the connector 410 on the cooling plate 200 is connected to the corresponding connector 410 on the adjacent cooling plate 200 through the connecting pipe 420, thereby sequentially connecting the liquid delivery channels in multiple cooling plates 200.

[0058] Furthermore, the number of connectors 410 and connecting pipes 420 in the liquid cooling pipe 400 can be reasonably set according to the actual number of cooling plates 200, improving the adaptability of the installation process and making it applicable to a wide range of applications.

[0059] Furthermore, such as Figure 2 As shown, the connector 410 includes a main tube 411, which is disposed on the cooling plate 200, and the interior of the main tube 411 is connected to the liquid cooling channel.

[0060] The main tube 411 is provided with a tube plug 412 for connecting with the connecting tube 420, and the interior of the tube plug 412 is connected to the interior of the main tube 411.

[0061] It should be noted that the connector 410 includes a main tube 411 and a pipe plug 412 disposed on the main tube 411. Two pipe plugs 412 are provided, located on opposite sides of the main tube 411. In implementation, the pipe plug 412 can be integrally formed with the main tube 411, or it can be connected to the main tube 411 by welding, screwing, or other methods.

[0062] During installation, the main tube 411 can be welded to the end of the cooling plate 200, so that the interior of the main tube 411 is connected to the liquid cooling channel. Next, the connecting pipes 420 are respectively fitted to the pipe plugs 412 on the two adjacent main tubes 411. The pipe plugs 412 can be connected to the connecting pipes 420 by interference fit, screw connection or other means, and there is no restriction.

[0063] In practice, for example, two caps 413 can be used to seal both ends of the pipe fitting to form the main pipe 411. The caps 413 can be connected to the pipe fitting by adhesive or welding.

[0064] In some embodiments, such as Figure 2 As shown, the cooling plate 200 includes at least one infusion pipe 210 and at least one pair of clamps 220. The infusion pipe 210 is located between the two clamps 220 of the same pair. The interior of the infusion pipe 210 is connected to the interior of the connector 410, and the interior of the infusion pipe 210 forms a liquid cooling channel.

[0065] In this embodiment, the inside of the infusion tube 210 is a liquid cooling channel, and the end of the infusion tube 210 is welded to the main body tube 411, so that the inside of the infusion tube 210 is connected to the inside of the main body tube 411.

[0066] Within the same cooling plate 200, the number of infusion tubes 210 can be set according to actual needs, such as one, two, three, or other numbers, ensuring that each infusion tube 210 is clamped between two clamping plates 220. In this embodiment, the clamping plates 220 are set as a pair, and the clamping plates 220 can be aluminum plates or other metal plates with good thermal conductivity. The clamping plates 220 can be connected to the infusion tubes 210 by bonding, welding, or other methods. In other embodiments, the clamping plates 220 can also be set to other numbers.

[0067] Therefore, the cooling plate 200 as a whole not only has good thermal conductivity, but also effectively improves strength and reduces the possibility of deformation during use.

[0068] In a preferred embodiment, the cooling plate 200 has two infusion pipes 210, and the gap 211 between the two infusion pipes 210 forms a clearance portion, which corresponds to the middle part of the sub-cell assembly 100.

[0069] It should be noted that the two infusion tubes 210 extend in parallel directions and correspond to the upper and lower parts of the sub-cell assembly 100, respectively, so that a gap 211 is formed between the two infusion tubes 210. The gap 211 is formed as a clearance part and corresponds to the middle part of the sub-cell assembly 100.

[0070] During operation, due to the relatively large stress in the middle of the sub-cell assembly 100, i.e. the relatively large deformation, the deformed part of the sub-cell assembly 100 will tend to push the clamping plate 220 into the gap 211. Thus, the gap 211 can provide space for the deformation of the sub-cell assembly 100 to absorb the internal stress of the sub-cell assembly 100.

[0071] In other embodiments, the clearance portion may also be a groove provided on the clamping plate 220, with the groove opening facing the sub-cell assembly 100.

[0072] Furthermore, such as Figure 3 As shown, the infusion tube 210 has at least one baffle 212, which divides the liquid cooling channel into multiple sub-liquid cooling channels, which are distributed along the width direction of the infusion tube 210.

[0073] The diameter of the sub-liquid cooling channel increases towards the center of the sub-cell group 100.

[0074] Specifically, multiple baffles 212 are provided, and the extending direction of the baffles 212 is consistent with the extending direction of the infusion tube 210. Each baffle 212 extends along the width direction of the infusion tube 210 (i.e., Figure 2 or Figure 3 The liquid cooling channels are spaced apart in the Z direction (as shown in the coordinate system), thus dividing the liquid cooling channel into multiple sub-liquid cooling channels distributed along the width direction of the liquid delivery pipe 210. Furthermore, the diameter of the sub-liquid cooling channels increases towards the center of the sub-cell assembly 100.

[0075] During the operation of the sub-cell assembly 100, the heat generated in the middle of the sub-cell assembly 100 is greater than that at the upper and lower ends. Therefore, by rationally setting the diameter of each sub-liquid cooling channel, the larger diameter sub-liquid cooling channel can have a larger coolant flow rate, which can effectively meet the cooling needs of the middle of the sub-cell assembly 100 and give full play to the role of the coolant.

[0076] In practice, the partition 212 can be installed inside the infusion pipe 210 by welding, integral molding, or other methods, without limitation. In addition, the diameter of the sub-liquid cooling channel can be reasonably adjusted according to actual needs to optimize the temperature uniformity of the cooling plate 200.

[0077] In summary, the battery system provided in this application embodiment, by staggering the sub-cell groups 100 and cooling plates 200, can greatly increase the contact area between the entire cell group and the cooling plates 200 (i.e., increase the cooling area). This allows multiple cooling plates 200 to simultaneously cool each sub-cell group 100 at different locations, significantly improving the overall cooling efficiency of the cell group and solving the problem of poor cooling performance in the prior art. Furthermore, during operation, the clearance portion provides deformation space for the sub-cell groups 100 to absorb internal stress (i.e., expansion force), reducing damage to the internal materials of the sub-cell groups 100 and extending their service life.

[0078] This application also provides an electrical device, including the battery system in any of the above embodiments.

[0079] The battery system has been described in detail in the above embodiments and will not be repeated here.

[0080] The electrical equipment also includes the main body of the equipment, which is electrically connected to the battery cells in the battery system. Thus, the main body of the equipment can be powered by the battery cells.

[0081] Therefore, during use, multiple cooling plates 200 can simultaneously cool each sub-cell group 100 at different locations, greatly improving the overall cooling efficiency of the cell group and solving the problem of poor cooling effect of the cell group in the prior art.

[0082] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A battery system, characterized in that, include: A battery cell assembly, comprising a plurality of spaced sub-cell assemblies (100). A cooling plate (200) is provided in multiple ways, and at least one cooling plate (200) is provided between two adjacent sub-cell groups (100), and the cooling plate (200) is in contact with the sub-cell group (100); The cooling plate (200) has a clearance portion for providing deformation space for the sub-cell assembly (100).

2. The battery system according to claim 1, characterized in that, It also includes a plurality of thermal pads (300) located between the cooling plate (200) and the sub-cell assembly (100) so that the cooling plate (200) contacts the sub-cell assembly (100) through the thermal pads (300).

3. The battery system according to claim 2, characterized in that, The thermal pad layer (300) is an elastic thermally conductive adhesive layer.

4. The battery system according to any one of claims 1-3, characterized in that, It also includes at least two liquid cooling pipes (400), and each of the cooling plates (200) has a liquid cooling channel inside; At least one of the liquid cooling pipes (400) is connected to one end of each of the liquid cooling channels in the extension direction, and at least one of the liquid cooling pipes (400) is connected to the other end of each of the liquid cooling channels in the extension direction.

5. The battery system according to claim 4, characterized in that, The liquid cooling pipe (400) includes multiple connectors (410) and multiple connecting pipes (420). Each connector (410) is correspondingly disposed on each cooling plate (200). The interior of each connector (410) is connected to the liquid cooling channel. The connecting pipe (420) connects the interiors of two adjacent connectors (410).

6. The battery system according to claim 5, characterized in that, The connector (410) includes a main tube (411), which is disposed on the cooling plate (200), and the interior of the main tube (411) is connected to the liquid cooling channel; The main tube (411) is provided with a tube plug (412) for connecting with the connecting tube (420), and the interior of the tube plug (412) is connected to the interior of the main tube (411).

7. The battery system according to claim 5, characterized in that, The cooling plate (200) includes at least one infusion tube (210) and at least one pair of clamps (220), the infusion tube (210) being located between the two clamps (220) of the same pair, the interior of the infusion tube (210) being connected to the interior of the connector (410), and the interior of the infusion tube (210) forming the liquid cooling channel.

8. The battery system according to claim 7, characterized in that, The infusion tube (210) has at least one baffle (212) inside, the baffle (212) divides the liquid cooling channel into multiple sub-liquid cooling channels, and the multiple sub-liquid cooling channels are distributed along the width direction of the infusion tube (210); The diameter of the sub-liquid cooling channel increases toward the center of the sub-cell assembly (100).

9. The battery system according to claim 7, characterized in that, The cooling plate (200) has two infusion tubes (210), and the gap (211) between the two infusion tubes (210) forms the clearance portion, which corresponds to the middle part of the sub-cell assembly (100).

10. An electrical appliance, characterized in that, Includes the battery system according to any one of claims 1-9.

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