Battery pack, energy storage device and electrical apparatus

Abstract

The present disclosure belongs to the technical field of batteries. Provided in the embodiments of the present disclosure are a battery pack, an energy storage device and an electrical apparatus. The battery pack comprises a box body, a thermal management component, and a battery unit. The thermal management component is mounted in the box body. The thermal management component separates the battery unit from the bottom wall of the box body. The battery unit comprises battery cells and a frame for mounting the battery cells. The thermal management component is used for adjusting the temperature of the battery cells, and the battery cells and the frame are both provided on the thermal management component.

Description

A battery pack, energy storage device and power consumption device

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421609971.1, filed on July 9, 2024, entitled “A Battery Pack, Energy Storage Device and Electrical Appliance”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, specifically to a battery pack, energy storage device, and power consumption device. Background Technology

[0004] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0005] In related technologies, the battery cells, which contain individual battery cells, inside the battery pack housing are regulated by thermal management components. However, the effectiveness of the thermal management components in regulating the temperature of the battery cells needs further improvement. Summary of the Invention

[0006] In view of this, the present disclosure aims to provide a battery pack, energy storage device, and power consumption device, with the goal of improving the temperature regulation effect of thermal management components on battery cells.

[0007] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0008] This disclosure provides a battery pack, including a housing, a thermal management component, and battery cells. The thermal management component is installed inside the housing. The thermal management component separates the battery cells from the bottom wall of the housing. The battery cells include individual battery cells and a frame for mounting the battery cells. The thermal management component is used to regulate the temperature of the battery cells. Both the battery cells and the frame are disposed within the thermal management component.

[0009] In this embodiment of the disclosure, the thermal management component separates the battery cell from the bottom wall of the housing, that is, there is a certain gap between the battery cell and the bottom wall of the housing. This can reduce the impact of the housing and the external environment on the battery cell and improve the temperature regulation effect of the thermal management component.

[0010] In one embodiment, the distance between the battery cell and the housing is greater than zero.

[0011] In this embodiment, there is a certain distance between the battery cell and the housing, which is greater than 0. This arrangement can reduce the impact of the housing and the external environment on the battery cell.

[0012] In one embodiment, the projection is along the arrangement direction of the battery cells and the thermal management components, and the projection area of ​​the battery cells is located within the projection area of ​​the thermal management components.

[0013] In this embodiment of the present disclosure, the projection area of ​​the battery cell is located within the projection area of ​​the thermal management component. This allows the thermal management component to separate the battery cell from the housing as much as possible, reducing the impact of external ambient temperature on the battery cell through the housing. This enables the thermal management component to better regulate the temperature of each battery cell in the battery pack, thereby improving the temperature regulation effect of the thermal management component on the battery cell.

[0014] In one embodiment, the battery pack further includes a connector that passes sequentially through the frame, the thermal management component, and the housing, so that the connector is connected to the housing and the frame respectively.

[0015] In this embodiment of the disclosure, the connectors are connected to the housing and the frame respectively, which can connect the frame, the thermal management component and the housing together, so that the frame set on the thermal management component can be installed more firmly.

[0016] In one embodiment, the battery cell spans across the opposite ends of the thermal management component along a preset direction. The frame includes two end plates arranged opposite each other along the preset direction. The battery cell is clamped between the two end plates. Connectors are sequentially inserted through the end plates, the thermal management component, and the housing, so that the connectors are connected to the end plates and the housing respectively.

[0017] In this embodiment, the connector is sequentially inserted through the end plate, the thermal management component, and the housing. This connects the end plate, the thermal management component, and the housing together, making the end plate more securely installed. This allows the end plate to have a higher load-bearing capacity and to better withstand the expansion force of the battery cells during operation.

[0018] In one embodiment, the thermal management component has clearance holes for the connector to pass through, and the thermal management component has an inlet channel, a temperature regulating channel and an outlet channel connected in series, with the temperature regulating channel located between at least two clearance holes along a preset direction.

[0019] In this embodiment of the present disclosure, the temperature regulating channel is located between at least two clearance holes along a preset direction, so that the working area of ​​the temperature regulating channel can cover as large an area as possible, so as to improve the working efficiency of regulating the temperature of the battery cell.

[0020] In one embodiment, the housing has a receiving cavity and a mounting hole communicating with the receiving cavity. The battery cell is located within the receiving cavity. The mounting hole is used to allow temperature-regulating fluid to enter and exit the thermal management component. The battery pack also includes a flange, a first connecting pipe, a second connecting pipe, and a sealing ring. The flange covers the mounting hole and is mounted to the housing. The first connecting pipe is connected to both the flange and the thermal management component to provide temperature-regulating fluid. The second connecting pipe is connected to both the flange and the thermal management component to discharge temperature-regulating fluid. The sealing ring makes sealing contact with both the flange and the housing. The space enclosed by the sealing ring spans the first and second connecting pipes, and the mounting hole is located within the sealing ring.

[0021] In this embodiment, the space enclosed by the sealing ring spans the first and second connecting pipes, and the mounting hole is located inside the sealing ring. This allows both the first and second connecting pipes to be sealed by the same sealing ring, reducing possible leakage points on the housing and improving the sealing degree and reliability of the housing.

[0022] In one embodiment, the first and second connecting pipes are located on the same side of the housing along the arrangement direction of the first connecting pipe and the second connecting pipe.

[0023] In this embodiment of the disclosure, the first and second connecting pipes are located on the same side of the housing, which can reduce the center distance between the first and second connecting pipes, reduce the size of the sealing ring in the direction of the two pipes, improve the reliability of the seal, and reduce the influence of the external environment on the cavity.

[0024] In one embodiment, the first connector, the second connector, and the flange are integrally formed.

[0025] In this embodiment, the first connector, the second connector, and the flange are integrally formed, and the flange and the flange together with the first and second connectors have good integrity, which improves the sealing reliability between the sealing ring, the flange, and the housing.

[0026] In one embodiment, an annular groove is formed on the side of the flange facing the mounting hole, and the space enclosed by the annular groove spans the first and second connecting pipes, with the sealing ring located within the annular groove.

[0027] In this embodiment, the flange has an annular groove on the side facing the mounting hole, and the sealing ring is installed in the annular groove. This makes the connection strength between the sealing ring and the flange higher and the sealing performance of the housing better.

[0028] An energy storage device includes a housing, a battery pack, and a charging gun. The battery pack is mounted in the housing, and the charging gun is electrically connected to the battery pack.

[0029] An electrical device includes an electrical power supply body and a battery pack. The battery pack is installed in the electrical power supply body.

[0030] In the battery pack, energy storage device, and power consumption device of this disclosure, the distance between the battery cells and the housing is greater than zero. This reduces the impact of the external environment on the battery cells through the housing, facilitates temperature regulation of the battery cells by the thermal management components, and improves the efficiency of temperature regulation. This arrangement can improve the working performance of the battery pack and extend its service life. Attached Figure Description

[0031] Figure 1 is a cross-sectional view of the battery packaging according to an embodiment of this disclosure;

[0032] Figure 2 is an enlarged view of point A in Figure 1;

[0033] Figure 3 is a schematic diagram of the thermal management components, flange, first connector, and second connector according to an embodiment of this disclosure;

[0034] Figure 4 is a schematic diagram of the temperature control flow channel of the thermal management component according to an embodiment of this disclosure;

[0035] Figure 5 is an enlarged view of point C in Figure 3;

[0036] Figure 6 is a schematic diagram of the battery cell in an embodiment of this disclosure;

[0037] Figure 7 is a schematic diagram of the flange, the first connecting pipe, and the second connecting pipe in an embodiment of this disclosure;

[0038] Figure 8 is a cross-sectional view of section BB in Figure 7;

[0039] Figure 9 is a schematic diagram of the housing and flange in an embodiment of this disclosure;

[0040] Figure 10 is an enlarged view of point D in Figure 9;

[0041] Figure 11 is a schematic diagram of the battery cell mounted on the thermal management component. (Explanation of reference numerals)

[0042] 1. Housing; 11. Receiving cavity; 12. Mounting hole; 13. Bottom wall; 131. Crossbeam; 2. Thermal management components; 21. Clearance hole; 22. Inlet channel; 23. Outlet channel; 24. Temperature regulating channel; 3. Battery unit; 31. Battery cell; 32. Frame; 321. End plate; 4. Connector; 5. Flange; 51. Annular groove; 6. First connecting pipe; 7. Second connecting pipe; 8. Sealing ring. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this disclosure and should not be regarded as undue limitations on this disclosure.

[0044] In the description of the embodiments of this disclosure, "upper", "lower", "top", "bottom", orientation or positional relationship are based on the orientation or positional relationship shown in Figure 2. It should be understood that these orientation terms are only for the convenience of describing this disclosure 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 disclosure.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms “comprising” and “having” and any variations thereof in embodiments of this disclosure are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0049] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0050] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0051] In related technologies, the battery unit in the battery pack housing includes a battery cell and a frame for mounting the battery cell. The frame of the battery cell is connected to the housing and contacts the bottom wall of the housing. The frame of the battery cell itself has a certain thermal conductivity. The external ambient temperature will be conducted through the battery pack and housing to the frame in contact with the housing, and then to the battery cell, affecting the temperature regulation of the battery cell by the thermal management component, resulting in poor temperature regulation effect of the thermal management component on the battery cell.

[0052] This embodiment of the present disclosure provides a thermal management component between the bottom wall of the housing and the battery cell. The thermal management component separates the bottom wall from the battery cell, making the distance between the bottom wall of the thermal management component and the battery cell greater than zero. This reduces the influence of the external environment on the temperature regulation of the battery cell through the housing and improves the temperature regulation effect of the thermal management component on the battery cell.

[0053] This disclosure provides a battery pack, as shown in Figures 1 to 8, including a housing 1, a thermal management component 2, and battery cells 3. The thermal management component 2 is installed inside the housing 1. The thermal management component 2 separates the battery cells 3 from the bottom wall 13 of the housing. The battery cells 3 include individual battery cells 31 and a frame 32 for mounting the battery cells 31. The thermal management component 2 is used to regulate the temperature of the battery cells 31. Both the battery cells 31 and the frame 32 are disposed within the thermal management component 2.

[0054] It should be explained that the thermal management component 2 separates the battery cell 3 from the bottom wall 13 of the housing, and the battery cell 3 is no longer in contact with the bottom wall 13 of the housing, and the distance between the battery cell 3 and the bottom wall 13 is greater than 0.

[0055] For example, battery cell 3 can be a battery module.

[0056] For example, the battery pack adopts a module-less structure, and the individual battery cells 31 of the battery unit 3 in the box are connected in series and / or in parallel to form a whole and placed in the box.

[0057] The thermal management component 2 is a structure that regulates the temperature of the battery cell by allowing a temperature-regulating fluid to flow through a channel within the thermal management component.

[0058] For example, thermal management component 2 is a water-cooled plate.

[0059] In this embodiment of the disclosure, the battery cell 31 can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0060] In this embodiment of the disclosure, the battery cell 31 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment of the disclosure is not limited to this.

[0061] For example, the battery cell 31 includes a housing and an electrode assembly disposed within the housing.

[0062] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is included between the housing and the electrode assembly to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film.

[0063] The electrode assembly includes a positive electrode, a negative electrode, and a separator between the positive and negative electrodes.

[0064] For example, the electrode assembly can be wound or stacked.

[0065] For example, please refer to Figures 1 and 2. A crossbeam 131 is formed on the bottom wall 13 of the housing. The crossbeam 131 is in contact with the thermal management component 2. The thermal management component 2 is in contact with the battery cell 3. The bottom wall 13 is spaced apart from the battery cell 3.

[0066] In this embodiment, the thermal management component 2 separates the battery cell 3 from the bottom wall 13 of the housing, that is, the battery cell 3 is no longer in contact with the bottom wall 13 of the housing, and the distance between the battery cell 3 and the bottom wall 13 is greater than 0. This can reduce the influence of the housing 1 and the external environment on the battery cell 31 and improve the temperature regulation effect of the thermal management component 2.

[0067] In one embodiment, as shown in Figures 1 and 2, the distance between the battery cell 3 and the housing 1 is greater than zero.

[0068] For example, there is a certain distance greater than zero between the battery unit 3 and the bottom wall 13 of the housing 1, and there is also a certain distance greater than zero between the battery unit 3 and other parts of the housing 1.

[0069] In this embodiment, the distance between the battery cell 3 and the housing 1 is greater than zero, meaning there is a certain distance between the battery cell and the housing, which is greater than 0. This arrangement can reduce the impact of the housing and the external environment on the battery cell.

[0070] In one embodiment, please refer to Figures 1 to 11. The projection is along the arrangement direction of the battery cell 3 and the thermal management component 2, and the projection area of ​​the battery cell 3 is located within the projection area of ​​the thermal management component 2.

[0071] For example, the arrangement direction of the battery cell 3 and the thermal management component 2 is projected as shown by arrow R2 in Figure 1.

[0072] In this embodiment, the projection area of ​​the battery cell 3 is located within the projection area of ​​the thermal management component 2. This allows the thermal management component 2 to separate the battery cell 3 from the housing 1 as much as possible, reducing the impact of the external ambient temperature on the battery cell 31 through the housing 1. This enables the thermal management component 2 to better regulate the temperature of each battery cell 3 in the battery pack, thereby improving the temperature regulation effect of the thermal management component 2 on the battery cell 31.

[0073] It should be understood that the relationship between the battery cell 3 and the thermal management component 2 is not limited to one of the above. For example, the projection area of ​​the battery cell 3 may also be partially located outside the projection area of ​​the thermal management component 2, that is, the battery cell 3 that does not contact the housing 1 may partially protrude from the thermal management component 2.

[0074] In one embodiment, referring to Figure 2, the battery pack also includes a connector 4, which is sequentially inserted through the frame 32, the thermal management component 2, and the housing 1, so that the connector 4 is connected to the housing 1 and the frame 32 respectively.

[0075] For example, it is detachably connected via connector 4.

[0076] For example, connector 4 is a bolt.

[0077] For example, the housing 1 and the frame 32 are riveted together.

[0078] In this embodiment of the disclosure, please refer to FIG1. ​​The connector 4 is connected to the housing 1 and the frame 32 respectively, so that the frame 32, the thermal management component 2 and the housing 1 can be connected together, and the frame set on the thermal management component can be installed more firmly.

[0079] For example, the connection between the housing 1 and the frame 32 and the thermal management component 2 is by welding.

[0080] For example, part of the connector 4 connects the thermal management component 2 and the housing 1, and part of the connector 4 connects the thermal management component 2 and the frame 32.

[0081] In one embodiment, please refer to Figures 1 to 3. The battery cell 3 spans across the opposite ends of the thermal management component 2 along a preset direction. The frame 32 includes two end plates 321 arranged opposite each other along the preset direction. The battery cell 31 is clamped between the two end plates 321. The connector 4 passes through the end plates 321, the thermal management component 2 and the housing 1 in sequence, so that the connector 4 is connected to the end plates 321 and the housing 1 respectively.

[0082] Please refer to Figure 3. The preset direction mentioned above is the direction shown by R1 in Figure 3. One end plate 321 is disposed at one end of the thermal management component 2 along the preset direction, and the other end plate 321 is disposed at the other end of the thermal management component 2 along the preset direction.

[0083] For example, the battery cell 31 is square in shape, and the preset direction is perpendicular to the surface of the battery cell 31 with the largest area.

[0084] For example, the end plate 321 is made of metal.

[0085] For example, two end plates 321 are respectively arranged at opposite ends of the thermal management component 2 along a preset direction, and the battery cells 31 are arranged in the area between the two end plates 321. The end plates 321, the thermal management component 2 and the housing 1 are connected by bolts.

[0086] In this embodiment, the connector 4 is sequentially inserted through the end plate 321, the thermal management component 2, and the housing 1. This connects the end plate 321, the thermal management component 2, and the housing 1 together, making the end plate 321 more securely installed. This allows the end plate 321 to have a higher load-bearing capacity and to better withstand the expansion force of the battery cell 31 during operation.

[0087] In one embodiment, please refer to Figures 1 to 4. The thermal management component 2 is formed with a clearance hole 21 through which the connector 4 passes. The thermal management component 2 is formed with an inlet channel 22, a temperature regulating channel 24 and an outlet channel 23 connected in series. The temperature regulating channel 24 is located between at least two clearance holes 21 along a preset direction.

[0088] For example, the inlet channel 22 and the outlet channel 23 are located outside the range enclosed by the clearance holes 21 at both ends of the thermal management component 2 along the preset direction, while the temperature regulating channel 24 is located within the range enclosed by the clearance holes 21 at both ends of the thermal management component 2 along the preset direction.

[0089] In this embodiment of the present disclosure, the temperature regulating channel 24 is located between at least two clearance holes 21 along a preset direction, so that the working area of ​​the temperature regulating channel 24 can cover as large an area as possible, so as to improve the working efficiency of temperature regulation of the battery cell 31.

[0090] It is understood that the arrangement of the inlet channel 22, the outlet channel 23 and the temperature regulating channel 24 is not limited to the above-described cases. For example, the temperature regulating channel 24 may be partially located outside the range enclosed by the two end clearance holes 21 along the preset direction.

[0091] In one embodiment, referring to Figures 1 to 5, 9, and 10, the housing 1 has a receiving cavity 11 and a mounting hole 12 communicating with the receiving cavity 11. The battery unit 3 is located within the receiving cavity 11. The mounting hole 12 is used to allow temperature-regulating fluid to enter and exit the thermal management component 2. The battery pack also includes a flange 5, a first connecting pipe 6, a second connecting pipe 7, and a sealing ring 8. The flange 5 covers the mounting hole 12 and is mounted on the housing 1. The first connecting pipe 6 is connected to both the flange 5 and the thermal management component 2 to provide temperature-regulating fluid. The second connecting pipe 7 is connected to both the flange 5 and the thermal management component 2 to discharge temperature-regulating fluid. The sealing ring 8 makes sealing contact with both the flange 5 and the housing 1. The space enclosed by the sealing ring 8 spans the first connecting pipe 6 and the second connecting pipe 7, and the mounting hole 12 is located within the sealing ring 8.

[0092] For example, please refer to Figure 5. The number of sealing rings is one. One sealing ring is sleeved on the first and second pipes to seal the first and second pipes.

[0093] For example, there are at least two sealing rings, each sealing ring enclosing a space spanning the first and second connectors, and each sealing ring is capable of sealing both the first and second connectors. For each sealing ring, both the first and second connectors are sealed by the same sealing ring.

[0094] For example, please refer to Figure 10, where a first connector passes through one of the mounting holes and a second connector passes through the other mounting hole.

[0095] In this embodiment, the space enclosed by the sealing ring 8 spans the first connecting pipe 6 and the second connecting pipe 7, and the mounting hole 12 is located inside the sealing ring 8. This allows the first connecting pipe 6 and the second connecting pipe 7 to be sealed by the same sealing ring, reducing possible leakage points on the housing and improving the sealing degree and reliability of the housing 1.

[0096] It is understood that the arrangement of the first connecting pipe 6, the second connecting pipe 7, and the sealing ring 8 is not limited to the above-described situation. For example, there may be two sealing rings 8 and two mounting holes 12. The first connecting pipe 6 passes through one of the sealing rings 8, and the second connecting pipe 7 passes through the other sealing ring 8. The mounting hole 12 corresponding to the first connecting pipe 6 is sealed to the housing 1 and the flange 5 respectively through the corresponding sealing ring 8. The mounting hole 12 corresponding to the second connecting pipe 7 is sealed to the housing 1 and the flange 5 respectively through the corresponding sealing ring 8.

[0097] In one embodiment, please refer to Figures 1 to 8. Along the arrangement direction of the first connecting pipe 6 and the second connecting pipe 7, the first connecting pipe 6 and the second connecting pipe 7 are both located on the same side of the housing 1.

[0098] For example, please refer to Figure 7. The span of the space enclosed by the sealing ring 8 along the arrangement direction of the first pipe 6 and the second pipe 7 is 60mm to 80mm.

[0099] For example, please refer to Figure 7. The span of the space enclosed by the sealing ring along the arrangement direction of the first and second pipes is D1, 60mm≤D1≤80mm;

[0100] For example, D1 can be 60mm, 65mm, 75mm or 80mm.

[0101] In this embodiment, the first connecting pipe 6 and the second connecting pipe 7 are located on the same side of the housing 1, which can reduce the center distance between the first connecting pipe 6 and the second connecting pipe 7, reduce the size of the sealing ring 8 in the direction of the two pipes, improve the reliability of the seal, and reduce the influence of the external environment on the cavity 11.

[0102] It should be explained that the arrangement of the first connector 6 and the second connector 7 is not limited to the above situation. For example, along the direction of the arrangement of the first connector 6 and the second connector 7, the first connector 6 and the second connector 7 are located on opposite sides of the housing 1.

[0103] In one embodiment, as shown in Figures 7 and 8, the first connecting pipe 6, the second connecting pipe 7, and the flange 5 are integrally formed.

[0104] In this embodiment, the first connecting pipe 6, the second connecting pipe 7, and the flange 5 are integrally formed, and the flange 5 and the flange 5 together with the first connecting pipe 6 and the second connecting pipe 7 have good integrity, which improves the sealing reliability between the sealing ring 8, the flange 5, and the housing 1.

[0105] It should be explained that the connection method of the first pipe 6, the second pipe 7 and the flange 5 is not limited to integral molding. For example, the first pipe 6, the second pipe 7 and the flange 5 can also be welded.

[0106] In one embodiment, as shown in Figures 7 and 8, an annular groove 51 is formed on the side of the flange 5 facing the mounting hole 12. The space enclosed by the annular groove 51 spans the first pipe 6 and the second pipe 7, and the sealing ring 8 is located within the annular groove 51.

[0107] For example, please refer to Figure 7. The space enclosed by the annular groove 51 for accommodating the first pipe 6 and the second pipe 7 is elongated.

[0108] In this embodiment, the flange 5 has an annular groove 51 on the side facing the mounting hole 12, and the sealing ring 8 is installed in the annular groove 51. This makes the connection strength between the sealing ring 8 and the flange 5 higher and the sealing performance of the housing 1 better.

[0109] The sealing ring groove can be omitted, and the flange facing the mounting hole 12 is a plane, with the sealing ring on the plane.

[0110] An energy storage device includes a housing 1, a battery pack, and a charging gun. The battery pack is installed in the housing 1, and the charging gun is electrically connected to the battery pack.

[0111] An electrical device includes an electrical power supply body and a battery pack. The battery pack is installed in the electrical power supply body.

[0112] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A battery pack, comprising: Box; Thermal management components are installed inside the housing; The battery unit, wherein the thermal management component separates the battery unit from the bottom wall of the housing, the battery unit includes a battery cell and a frame for mounting the battery cell, the thermal management component is used to regulate the temperature of the battery cell, and both the battery cell and the frame are disposed on the thermal management component; A connector is sequentially inserted through the frame, the thermal management component, and the housing, so that the connector is connected to the housing and the frame respectively.

2. The battery pack according to claim 1, wherein, The distance between the battery cell and the housing is greater than zero.

3. The battery pack according to claim 1 or 2, wherein, Projecting along the arrangement direction of the battery cells and the thermal management components, the projection area of ​​the battery cells is located within the projection area of ​​the thermal management components.

4. The battery pack according to any one of claims 1 to 3, wherein, The battery cell is straddling the opposite ends of the thermal management component along a preset direction. The frame includes two end plates arranged opposite each other along the preset direction. The battery cell is clamped between the two end plates. The connector is sequentially inserted through the end plates, the thermal management component, and the housing, so that the connector is connected to the end plates and the housing respectively.

5. The battery pack according to claim 4, wherein, The thermal management component has a clearance hole through which the connector passes. The thermal management component has an inlet channel, a temperature regulating channel and an outlet channel connected in series. The temperature regulating channel is located between at least two clearance holes along the preset direction.

6. The battery pack according to any one of claims 1 to 5, wherein, The housing has a receiving cavity and a mounting hole communicating with the receiving cavity. The battery cell is located within the receiving cavity. The mounting hole is used to avoid temperature-regulating fluid entering and exiting the thermal management components. The battery pack also includes: A flange is provided over the mounting hole, and the flange is installed in the housing; The first connecting pipe is connected to the flange and the thermal management component respectively to provide temperature-regulating fluid; The second pipe is connected to the flange and the thermal management component respectively to discharge the temperature-regulating fluid; A sealing ring is in sealing contact with the flange and the housing respectively. The space enclosed by the sealing ring spans the first pipe and the second pipe, and the mounting hole is located inside the sealing ring.

7. The battery pack according to claim 6, wherein, Along the arrangement direction of the first and second connectors, both the first and second connectors are located on the same side of the housing.

8. The battery pack according to claim 6 or 7, wherein, The first connecting pipe, the second connecting pipe, and the flange are integrally formed.

9. The battery pack according to any one of claims 6 to 8, wherein, An annular groove is formed on the side of the flange facing the mounting hole, and the space enclosed by the annular groove spans the first pipe and the second pipe, with the sealing ring located within the annular groove.

10. An energy storage device, comprising: Box; The battery pack according to any one of claims 1 to 9 is installed in the housing; The charging gun is electrically connected to the battery pack.

11. An electrical appliance, comprising: Electricity-consuming entities; The battery pack according to any one of claims 1 to 9 is installed on the power-consuming body.

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