Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and relates to the technical field of battery packs. The battery pack comprises a battery cell, an acquisition plate and a phase change cooling structure, wherein a connecting piece is arranged at the end part of the battery cell; the acquisition plate is positioned at the end part of the battery cell and is electrically connected with the connecting sheet; and the phase change cooling structure is arranged between the connecting sheet and the collecting plate so as to quickly absorb heat deposited at the end part of the battery cell. According to the battery pack provided by the embodiment of the utility model, heat generated by the battery cells can be absorbed and taken away by the phase change cooling material in time, so that the cooling effect is improved.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, specifically to a battery pack and an electrical device. Background Technology

[0002] In some existing battery pack cooling technologies, phase change cooling materials are placed in direct contact with the battery cells for heat dissipation. However, this method is not very effective because the phase change cooling materials themselves have relatively poor thermal conductivity. This poor thermal conductivity makes it difficult for the cooling material to effectively absorb the heat generated by the battery cells, thus hindering the triggering of the phase change process and limiting the cooling effect.

[0003] Therefore, there is room for improvement in battery pack design. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide a battery pack that can promptly absorb and remove the heat generated by the battery cells using a phase change cooling material, thereby improving the cooling effect.

[0005] The second aspect of this utility model aims to provide an electrical device.

[0006] A battery pack according to a first aspect of the present invention includes: a battery cell, a data acquisition plate, and a phase change cooling structure. The battery cell has a connecting piece at its end. The data acquisition plate is located at the end of the battery cell and is electrically connected to the connecting piece. The phase change cooling structure is disposed between the connecting piece and the data acquisition plate to quickly absorb the heat deposited at the end of the battery cell.

[0007] According to some optional embodiments, the phase change cooling structure includes: a heat-conducting element having a receiving groove; and a phase change cooling medium filling the receiving groove.

[0008] Optionally, the receiving groove is disposed on the surface of the heat-conducting component, and the phase change cooling structure further includes an encapsulation film for encapsulating the phase change cooling medium in the receiving groove.

[0009] In some optional embodiments, the heat-conducting element is a heat-conducting plate, which is stacked with the collection plate.

[0010] According to some embodiments of the present application, the battery pack has multiple battery cells arranged along the length of the acquisition plate, and each battery cell has a connecting piece at its end; the heat-conducting plate extends along the length of the acquisition plate, and one side of the heat-conducting plate is connected to the connecting pieces of all the battery cells in the same row.

[0011] In some optional embodiments, the heat-conducting plate has the same shape as the acquisition plate; the projection of the acquisition plate onto the heat-conducting plate is completely located within the heat-conducting plate, and the projections of the connecting pieces of all the cells in the same row onto the heat-conducting plate are completely located within the heat-conducting plate.

[0012] Optionally, the heat-conducting plate has accommodating grooves on both opposite sides, and the accommodating grooves on both sides are filled with the phase change cooling medium.

[0013] Optionally, the receiving groove includes at least one of a circular groove and a polygonal groove, and the phase change cooling medium has the same shape as the receiving groove; there are multiple receiving grooves, and the multiple receiving grooves are arranged in a matrix on the heat-conducting component.

[0014] In some optional embodiments, the phase change cooling structure includes: at least two heat-conducting plates, each heat-conducting plate having a receiving groove for filling the phase change cooling medium; at least two heat-conducting plates are arranged along the length direction of the collecting plate or along the thickness direction of the collecting plate; adjacent heat-conducting plates are connected to achieve heat equalization.

[0015] According to some embodiments of the battery pack, the battery cell is elongated and strip-shaped, with connecting tabs at both ends of the cell along its length; there are multiple battery cells stacked along their thickness; there are two data acquisition plates, each located at one end of the battery cell and extending along the thickness of the cell; there are two phase change cooling structures, each corresponding to one of the two data acquisition plates, with each phase change cooling structure sandwiched between the data acquisition plate and the connecting tab.

[0016] The electrical equipment according to a second aspect of the present invention includes the battery pack according to a first aspect of the present invention.

[0017] 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

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the battery pack structure in some embodiments of the present invention;

[0020] Figure 2 This is a schematic diagram showing the positions of the acquisition plate and the phase change cooling structure in some embodiments of this utility model;

[0021] Figure 3 This is a structural schematic diagram of one shape of the receiving groove in the heat-conducting component in some embodiments of this utility model;

[0022] Figure 4 This is a schematic diagram of another shape of the receiving groove in the heat-conducting component in some embodiments of this utility model;

[0023] Figure 5 This is a schematic diagram of another shape of the receiving groove in the heat-conducting component in some embodiments of this utility model.

[0024] Figure label:

[0025] Battery pack 100, battery cell 10, connecting piece 11, acquisition board 20, phase change cooling structure 30, heat conduction component 31, heat conduction plate 310, accommodating groove 311, phase change cooling medium 32. Detailed Implementation

[0026] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "length," "thickness," "upper," "lower," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0029] The following is for reference. Figures 1-5The present invention describes a battery pack 100 according to a first aspect embodiment. The application fields of the battery pack 100 are not limited, and it can be used in the field of transportation, energy storage, industrial automation and robotics, data centers and backup power, outdoor exploration and emergency rescue, and home and commercial energy storage, among other fields.

[0030] like Figure 1 As shown, the battery pack 100 according to an embodiment of the present invention includes: a battery cell 10, a data acquisition board 20, and a phase change cooling structure 30.

[0031] The end of the battery cell 10 is provided with a connecting piece 11.

[0032] The connecting piece 11 is located at the end of the battery cell 10 and serves as a medium for heat conduction, transferring the heat generated by the battery cell 10 during operation and preventing heat accumulation at the end of the battery cell 10. Simultaneously, the connecting piece 11 also acts as a bridge connecting the battery cell 10 to external components, enabling the input and output of electrical energy.

[0033] Optionally, the shape of the connecting piece 11 is adapted to connect to the end of the battery cell 10. For example, the connecting piece 11 can be designed as a long strip or other regular or irregular shape. By contacting the connecting piece 11 of the above shape with the end of the battery cell 10, the surface area of ​​the connecting piece 11 can be fully utilized, thereby improving the connection efficiency and heat conduction effect.

[0034] The data acquisition board 20 is located at the end of the battery cell 10 and is electrically connected to the connecting piece 11. This configuration allows the data acquisition board 20 to effectively monitor the status of the battery cell 10.

[0035] It is important to know that the acquisition board 20 is used to collect operating status information of the battery cell 10, such as voltage and temperature, so that the battery management system can monitor and manage it. By placing the acquisition board 20 at the end of the battery cell 10 and connecting it to the connecting piece 11, an effective electrical connection between the acquisition board 20 and the connecting piece 11 can be achieved.

[0036] The phase change cooling structure 30 is located between the connecting piece 11 and the acquisition plate 20 to quickly absorb the heat deposited at the end of the cell 10.

[0037] The phase change cooling structure 30 includes a heat-absorbing material. Preferably, the heat-absorbing material is a phase change material, which can absorb heat in a high-temperature environment. The phase change material can be a solid-liquid phase change material, a solid-gas phase change material, or a liquid-gas phase change material. Under normal use, the phase change material does not undergo a phase change. When the temperature around the phase change cooling structure 30 rises, the phase change material can undergo a phase change after absorbing sufficient heat, changing from a solid to a liquid, from a solid to a gas, or from a liquid to a gas. This allows the phase change material to absorb a large amount of heat during the phase change process, effectively preventing overheating at the end of the battery cell 10.

[0038] For example, the heat-absorbing material included in the phase change cooling structure 30 is one of paraffin wax, hydrogel, or crystalline hydrate. Preferably, the heat-absorbing material is hydrogel, and the large amount of heat generated during thermal runaway is used for the latent heat of phase change of the hydrogel.

[0039] By placing the phase change cooling structure 30 between the connecting piece 11 and the acquisition plate 20, it can effectively conduct and absorb the heat released from the end of the battery cell 10 from the connecting piece 11, thereby preventing overheating.

[0040] Of course, heat-absorbing materials can also be other heat-absorbing materials with the same effect.

[0041] Combination Figures 2-5 According to some embodiments of the present invention, the battery pack 100 includes a phase change cooling structure 30 comprising a heat-conducting element 31 and a phase change cooling medium 32. The heat-conducting element 31 is provided with a receiving groove 311.

[0042] The phase change cooling structure 30 continuously absorbs heat during the charging and discharging process of the battery pack 100. The heat-conducting component 31 transfers the heat from the connecting piece 11 deep into the phase change cooling medium 32, and causes most of the phase change cooling medium 32 to absorb heat synchronously until the charging and discharging ends. The phase change cooling then gradually releases its latent heat.

[0043] Therefore, by setting the heat-conducting component 31, on the one hand, the heat on the connecting piece 11 can be quickly dissipated; on the other hand, it helps to balance the temperature distribution and ensure that the phase change cooling structure 30 absorbs this heat more quickly and evenly.

[0044] The heat-conducting component 31 is made of a material with high thermal conductivity.

[0045] For example, the heat-conducting element 31 is made of copper, aluminum, or an alloy material, which can quickly conduct heat from the connecting piece 11 to the entire surface of the heat-conducting element 31. Preferably, the heat-conducting element 31 is made of aluminum.

[0046] The phase change cooling medium 32 is filled in the accommodating groove 311 and can absorb heat from the heat-conducting component 31.

[0047] Specifically, when the temperature of the battery pack 100 rises, the phase change cooling medium 32 absorbs a large amount of heat energy, gradually melting from a solid state to a liquid state, thereby effectively reducing the temperature of the battery pack 100. As heat absorption continues, the phase change cooling medium 32 can be completely liquefied. When the battery pack 100 stops working or external cooling measures are introduced, the liquid medium will gradually solidify back to a solid state, preparing to enter the next heat absorption process.

[0048] Moreover, compared to arranging the phase change cooling medium 32 over the entire area at the battery end, filling the accommodating groove 311 with the phase change cooling medium 32 only saves more material. This method maximizes heat absorption while using less phase change cooling medium 32. The accommodating groove 311 ensures that the phase change cooling medium 32 is in direct, close contact with the heat source (such as the battery connecting piece 11), thereby improving heat exchange efficiency. This localized cooling layout not only reduces material waste but also allows heat to be more effectively guided and absorbed, thus improving the heat dissipation performance and overall energy efficiency of the battery pack 100.

[0049] In some optional embodiments, the receiving groove 311 is disposed on the surface of the heat-conducting element 31, and the phase change cooling structure 30 further includes an encapsulation film for encapsulating the phase change cooling medium 32 within the receiving groove 311.

[0050] In some technical solutions, the receiving groove 311 is provided on the side surface of the heat-conducting element 31 near the connecting piece 11, and the phase change cooling medium 32 is filled in these receiving grooves 311 so as to have close contact with the heat-conducting element 31 and the connecting piece 11 and to efficiently absorb heat.

[0051] Alternatively, in some other technical solutions, the receiving groove 311 is located on the surface of the heat-conducting element 31 away from the connecting piece 11, which enables the heat-conducting element 31 to achieve a better temperature uniformity, because the heat can be more evenly distributed inside the heat-conducting element 31 and then absorbed by the phase change cooling medium 32.

[0052] The encapsulation film encapsulates the phase change cooling medium 32 in the receiving groove 311 to prevent leakage of the phase change cooling medium 32 during the operation of the battery pack 100.

[0053] Here, the encapsulation film has the characteristics of electrical insulation and good thermal conductivity. While encapsulating the phase change cooling medium 32, it prevents the current of the battery cell 10 from being transmitted to the outside.

[0054] In some alternative embodiments, the heat-conducting element 31 is a heat-conducting plate 310.

[0055] The heat-conducting plate 310 is a plate with high thermal conductivity. For example, the heat-conducting plate 310 can be a copper plate, an aluminum plate, or an alloy plate. These materials have high thermal conductivity and can quickly conduct heat from the connecting piece 11 to the entire surface of the heat-conducting plate 310, achieving a better temperature uniformity. Preferably, the heat-conducting plate 310 is an aluminum plate.

[0056] The heat-conducting plate 310 and the collection plate 20 are stacked. By stacking the heat-conducting plate 310 on the collection plate 20, the cumulative thickness of the overall component in the vertical direction is increased, but this does not lead to an increase in the horizontal direction or the overall volume. This layout can control the size of the entire device and ensure that a compact and efficient space utilization rate is maintained while ensuring performance.

[0057] In some alternative embodiments, see Figure 1 There are multiple battery cells 10, which are arranged along the length of the acquisition plate 20. Each battery cell 10 has a connecting piece 11 at its end. A heat-conducting plate 310 extends along the length of the acquisition plate 20, and one side of the heat-conducting plate 310 is connected to the connecting pieces 11 of all the battery cells 10 in the same row.

[0058] When there are multiple cells 10, these connecting pieces 11 are also used to connect the cells 10 to meet the voltage and capacity requirements of the battery pack. The connecting pieces 11 not only ensure the electrical connection between the cells 10, but also serve as a medium for heat transfer, mitigating temperature differences between different cells 10.

[0059] When a portion of the battery cells 10 generates a high temperature, this heat can be transferred to adjacent battery cells 10 via the connecting piece 11. Optionally, the connecting piece 11 is made of a material with high thermal conductivity and good electrical conductivity. For example, the connecting piece 11 is made of copper or aluminum. This ensures both conductivity and high heat transfer efficiency. Thus, the heat from the high-temperature battery cell 10 can be distributed to adjacent battery cells 10, thereby achieving temperature balance among the battery cells 10.

[0060] Optionally, the heat-conducting plate 310 and the collecting plate 20 have the same shape. By constructing the heat-conducting plate 310 and the collecting plate 20 with the same shape, the two can correspond well and ensure a good fit between them.

[0061] The projection of the acquisition board 20 onto the heat-conducting plate 310 is completely within the heat-conducting plate 310, and the projections of the connecting pieces 11 of all the cells 10 in the same row onto the heat-conducting plate 310 are completely within the heat-conducting plate 310.

[0062] First, when the projection of the acquisition plate 20 is completely within the heat-conducting plate 310, this means that the edge of the acquisition plate 20 will not extend beyond either side of the heat-conducting plate 310. This design ensures that the acquisition plate 20 is completely covered by the heat-conducting plate 310, with no part suspended or extending beyond its boundaries. This close fit enhances the structural stability between the two, further improving the stability and reliability of the acquisition plate 20.

[0063] According to some embodiments of the present utility model, the battery pack 100, combined with Figures 2-5The heat-conducting plate 310 has accommodating grooves 311 on both sides of its opposite surface, and both sides of the accommodating grooves 311 are filled with phase change cooling medium 32.

[0064] By placing the receiving grooves 311 on both sides of the heat-conducting plate 310, the phase change cooling medium 32 can cool the heat-conducting plate 310 from both directions simultaneously. This bidirectional cooling mechanism further enhances the heat dissipation efficiency, making the temperature distribution inside the battery pack 100 more uniform, avoiding local overheating, thereby maximizing the temperature uniformity of the heat-conducting component 31, and achieving better heat absorption.

[0065] According to some embodiments of the present invention, the battery pack 100 includes a receiving groove 311 comprising at least one of a circular groove and a polygonal groove, and the phase change cooling medium 32 has the same shape as the receiving groove 311.

[0066] In some such Figure 2 In the embodiments shown, the receiving grooves 311 are all circular grooves; while in some... Figure 3 In the illustrated embodiment, the receiving groove 311 includes a hexagonal groove, a triangular groove, and a quadrilateral groove; while in some other embodiments... Figure 4 In the embodiment shown, the receiving groove 311 is a square groove; in some other embodiments, such as... Figure 5 In the embodiment shown, the receiving groove 311 is a triangular groove.

[0067] The phase change cooling medium 32 has the same shape as the receiving tank 311 to better absorb the heat from the heat-conducting plate 310.

[0068] There are multiple receiving slots 311, and the multiple receiving slots 311 are arranged in a matrix on the heat-conducting component 31.

[0069] Here, the matrix arrangement consists of multiple receiving slots 311 arranged in a predetermined row and column pattern on the heat-conducting component 31. Each row and each column contains multiple receiving slots 311.

[0070] This layout allows the accommodating grooves 311 to be more densely distributed on the heat-conducting component 31, thereby ensuring that more heat can be transferred and discharged through the phase change cooling medium 32.

[0071] The matrix-arranged receiving slots 311 can maximize the use of the surface area of ​​the heat-conducting component 31, increase the contact area with the phase change cooling medium 32, and thus improve the heat dissipation efficiency.

[0072] Furthermore, the matrix arrangement ensures a uniform distribution of the receiving grooves 311 on the heat-conducting component 31. This distribution not only optimizes space utilization but also significantly promotes uniform heat transfer. Specifically, when heat is transferred from the connecting piece 11 to the heat-conducting component 31, the uniform distribution of the receiving grooves 311 allows for smoother and more even heat entry into the grooves, where it is effectively absorbed and dissipated by the surrounding phase-change cooling medium 32. This arrangement not only improves the efficiency of heat conduction but also ensures uniform heat distribution throughout the system, effectively preventing localized overheating or uneven cooling, and enhancing overall thermal management and system stability.

[0073] Combination Figure 2 , Figure 4 and Figure 5 The receiving slots 311 are arranged in two rows and multiple columns. Here, the arrangement of each column of the receiving slots 311 corresponds to the arrangement of each column of the battery cell 10, so as to ensure that each end of the battery cell 10 is provided with a corresponding receiving slot 311, thereby ensuring effective heat dissipation at the end of the battery cell 10.

[0074] Combination Figure 3 The receiving slots 311 are arranged in multiple rows and columns. Here, the arrangement of the receiving slots 311 can efficiently utilize the overall area of ​​the heat-conducting component 31, thereby improving the heat conduction efficiency and internal space utilization of the battery pack.

[0075] In some optional embodiments, the phase change cooling structure 30 includes at least two heat-conducting plates 310, each heat-conducting plate 310 having a receiving groove 311 for filling the phase change cooling medium 32.

[0076] By setting multiple heat-conducting plates 310, heat can be more widely distributed among them. Each heat-conducting plate 310 acts as a heat conduction channel, transferring heat from the heat source to the phase change cooling medium 32 on it. As the number of heat-conducting plates 310 increases, the area of ​​heat distribution also expands, thereby improving the overall heat dissipation efficiency.

[0077] Meanwhile, the presence of multiple heat-conducting plates 310 helps reduce the temperature gradient around the heat source. When heat is transferred from the heat source to the heat-conducting plates 310, the uniform distribution of the heat-conducting plates 310 allows the heat to be distributed more evenly across the multiple heat-conducting plates 310. This helps reduce localized high-temperature areas near the heat source and improves the overall uniformity of temperature distribution.

[0078] At least two heat-conducting plates 310 are arranged along the length of the collection plate 20.

[0079] When the heat-conducting plates 310 are arranged along the length of the collection plate 20, they can cover a longer heat source area, thereby maximizing the heat dissipation area. The heat-conducting plates 310 arranged along the length can more effectively conduct heat from the end of the cell 10 to the heat-conducting plates 310, improving heat dissipation efficiency. Simultaneously, given the limited internal space of the battery pack 100, the heat-conducting plates 310 arranged along the length can more effectively utilize horizontal space and reduce the occupation of vertical space, thereby optimizing the layout of the battery pack 100.

[0080] Alternatively, at least two heat-conducting plates 310 may be arranged along the thickness direction of the collection plate 20. Increasing the number of heat-conducting plates 310 in the thickness direction can also improve the heat capacity of the entire heat dissipation structure, which helps to improve the heat absorption capacity and prevent the heat source from overheating.

[0081] Adjacent heat-conducting plates 310 are connected to ensure even heat distribution. Here, adjacent heat-conducting plates 310 can be in direct contact or connected through thermal adhesive, thermal pads, etc., to ensure that heat can be transferred between multiple heat-conducting plates 310, avoid excessive heat accumulation on a single heat-conducting plate 310, and improve the efficiency of heat transfer.

[0082] According to some embodiments of the present invention, the battery pack 100 has a long strip-shaped cell 10, and each end of the cell 10 has a connecting piece 11. Multiple cells 10 are stacked along their thickness direction.

[0083] Connecting tabs 11 are used to connect multiple battery cells 10 in series or parallel to meet the voltage and capacity requirements of the battery pack 100. The connecting tabs 11 simplify and ensure reliable electrical connections between the battery cells 10, and also facilitate the assembly and maintenance of the battery pack 100. Furthermore, the connecting tabs 11 at both ends not only serve as bridges for electrical connections but also as channels for heat transfer. The heat generated by the battery cells 10 can be dissipated more extensively through the connecting tabs 11 at both ends.

[0084] There are two data acquisition boards 20, located at both ends of the battery cell 10. Each data acquisition board 20 extends along the thickness direction of the battery cell 10, thus covering the connecting piece 11 of the battery cell 10. The main function of the data acquisition boards 20 is to collect and transmit the current generated by the battery cell 10, ensuring that the battery pack 100 can operate normally.

[0085] To further improve the heat dissipation performance of the battery pack 100, this embodiment of the utility model also employs two phase change cooling structures 30. These two phase change cooling structures 30 correspond one-to-one with the two data acquisition plates 20, and each phase change cooling structure 30 is sandwiched between the data acquisition plate 20 and the connecting piece 11 of the battery cell 10. The phase change cooling structure 30 utilizes the heat absorption characteristics of the phase change material; when the temperature of the battery cell 10 rises, the phase change material undergoes a phase change and absorbs a large amount of heat, thereby reducing the temperature of the battery cell 10. This arrangement improves the heat dissipation efficiency of the battery pack 100, thus helping to extend the service life of the battery pack 100.

[0086] The electrical equipment according to the second aspect of the present invention includes a battery pack 100 according to the first aspect of the present invention.

[0087] It is worth noting that electrical equipment can include vehicles, household appliances, industrial equipment, etc.

[0088] When the electrical device is a vehicle, the battery pack 100 can be located at the bottom, front, or rear of the vehicle. The battery pack 100 can be used to power the vehicle; for example, it can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller controls the battery pack 100 to supply power to the motor, for example, to meet the vehicle's power needs during starting, navigation, and driving. In some embodiments of this application, the battery pack 100 can not only serve as the vehicle's operating power source but also as its driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle.

[0089] By utilizing the battery pack 100 of the above embodiment, the heat generated by the battery cell 10 during operation can be rapidly and uniformly absorbed by the phase change cooling material. This process ensures the immediate transfer of heat, thereby helping to improve the safety of electrical equipment.

[0090] The following is for reference. Figure 1 - Figure 5 The battery pack 100 according to embodiments of the present invention is described in detail with reference to some specific examples. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0091] Example 1

[0092] Reference Figure 1 and Figure 2 The battery pack 100 includes: a battery cell 10, a data acquisition board 20, and a phase change cooling structure 30.

[0093] There are multiple battery cells 10, which are arranged along the length of the acquisition board 20. Each battery cell 10 has a connecting piece 11 at its end.

[0094] The heat-conducting plate 310 extends along the length of the collection plate 20, and one side of the heat-conducting plate 310 is connected to the connecting piece 11 of all the cells 10 in the same row.

[0095] The acquisition board 20 is located at the end of the battery cell 10 and is electrically connected to the connecting piece 11.

[0096] The phase change cooling structure 30 is located between the connecting piece 11 and the acquisition plate 20 to quickly absorb the heat deposited at the end of the cell 10.

[0097] The phase change cooling structure 30 includes a heat-conducting element 31 and a phase change cooling medium 32.

[0098] The heat-conducting component 31 is a heat-conducting plate 310.

[0099] The heat-conducting plate 310 has receiving grooves 311 on both opposite sides of its surface.

[0100] There are multiple receiving slots 311, and all receiving slots 311 are circular slots. The multiple receiving slots 311 are arranged in a matrix on the heat-conducting plate 310.

[0101] Both sides of the receiving groove 311 are filled with phase change cooling medium 32.

[0102] The heat-conducting plate 310 and the collection plate 20 are stacked, and the heat-conducting plate 310 and the collection plate 20 have the same shape.

[0103] The projection of the acquisition board 20 onto the heat-conducting plate 310 is completely within the heat-conducting plate 310, and the projections of the connecting pieces 11 of all the cells 10 in the same row onto the heat-conducting plate 310 are completely within the heat-conducting plate 310.

[0104] Example 2

[0105] This embodiment has the same basic structure as Embodiment 1, the difference being that, referring to... Figure 3 The receiving groove 311 includes a hexagonal groove, a triangular groove and a quadrilateral groove.

[0106] Example 3

[0107] This embodiment has the same basic structure as Embodiment 1, the difference being that, referring to... Figure 4 The receiving slot 311 is a square slot.

[0108] Example 4

[0109] This embodiment has the same basic structure as Embodiment 1, the difference being that, referring to... Figure 5 The receiving groove 311 is a triangular groove.

[0110] Other components of the battery pack 100 according to embodiments of the present invention, such as electrical equipment and vehicles, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0111] In the description of this specification, references to terms such as "embodiment," "example," 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, 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.

[0112] 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, characterized by, The battery pack comprises: an electric core, an end of which is provided with a connecting sheet; a collecting plate, which is located at the end of the electric core and is electrically connected with the connecting sheet; a phase change cooling structure, which is arranged between the connecting sheet and the collecting plate to quickly absorb heat deposited at the end of the electric core.

2. The battery pack of claim 1, wherein, The phase change cooling structure comprises: a heat-conducting member, which is provided with a containing groove; a phase change cooling medium, which is filled in the containing groove.

3. The battery pack of claim 2, wherein, The containing groove is arranged on the surface of the heat-conducting member, and the phase change cooling structure further comprises an encapsulation film for encapsulating the phase change cooling medium in the containing groove.

4. The battery pack of claim 2, wherein, The heat-conducting member is a heat-conducting plate, which is arranged in a stack with the collecting plate.

5. The battery pack of claim 4, wherein, The electric core is in plurality, and the plurality of electric cores are arranged along the length direction of the collecting plate, and the end of each electric core is provided with the connecting sheet. The heat-conducting plate is arranged along the length direction of the collecting plate, and one side of the heat-conducting plate is connected with the connecting sheets of all the electric cores in the same row.

6. The battery pack of claim 5, wherein, The heat-conducting plate has the same shape as the collecting plate. The projection of the collecting plate on the heat-conducting plate is completely located in the heat-conducting plate, and the projection of the connecting sheets of all the electric cores in the same row on the heat-conducting plate is completely located in the heat-conducting plate.

7. The battery pack of claim 4, wherein, The opposite two side surfaces of the heat-conducting plate are both provided with the containing groove, and the containing grooves on the two sides are both filled with the phase change cooling medium.

8. The battery pack of claim 2, wherein, The containing groove comprises at least one of a circular groove and a polygonal groove, and the phase change cooling medium has the same shape as the containing groove. The containing groove is in plurality, and the plurality of containing grooves are arranged in a matrix on the heat-conducting member.

9. The battery pack of claim 4, wherein, The phase change cooling structure comprises at least two heat-conducting plates, each of which is provided with the containing groove to fill the phase change cooling medium. The at least two heat-conducting plates are arranged along the length direction of the collecting plate or along the thickness direction of the collecting plate. The adjacent two heat-conducting plates are connected to be heat equalized.

10. The battery pack of any one of claims 1-9, wherein, The electric core is in strip shape, and the electric core is provided with the connecting sheet at both ends in the length direction thereof. The electric core is in plurality, and the plurality of electric cores are arranged in a stack along the thickness direction thereof. The collecting plate is in two, and the two collecting plates are arranged at the two ends of the electric core, and each collecting plate is arranged to extend along the thickness direction of the electric core. The phase change cooling structure is in two, and the two phase change cooling structures correspond to the two collecting plates one by one, and each phase change cooling structure is arranged between the collecting plate and the connecting sheet.

11. An electrical device, characterized by The battery pack comprises the battery pack according to any one of claims 1-10.

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