Battery pack and electric device

Abstract

The utility model relates to power battery technical field and provide a kind of battery pack and electrical equipment.The battery pack includes battery pack shell and the battery module being arranged in the inside of battery pack shell.The battery module includes multiple module units arranged along preset direction.The module unit includes module shell body and the cylindrical battery cell being arranged in module shell body, and the installation cavity for installing cylindrical battery cell is equipped in the inside of module shell body, and two passages are communicated with both ends of installation cavity, and two passages can make cooling liquid flow along the axial direction of cylindrical battery cell in installation cavity.The battery pack of the utility model, by setting multiple arrangement and arrangement module units, utilize the longitudinal space in the battery pack shell, improve the space utilization of battery pack, and make cooling liquid flow along the axial direction of cylindrical battery cell between each cylindrical battery cell, can reduce the temperature difference between each cylindrical battery cell, benefit to improve the consistency of battery cell temperature, to guarantee the use effect of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery pack. This utility model also relates to an electrical device having the aforementioned battery pack. Background Technology

[0002] With the rapid development of new energy fields such as electric vehicles and energy storage systems, the performance and safety of battery packs have received widespread attention. The densely packed cylindrical cells within a battery pack generate a large amount of heat during operation. To improve heat dissipation, existing technologies often employ immersion cooling, where each cell in the battery pack is submerged in a circulating coolant, allowing the coolant's flow to carry away the heat generated by the cylindrical cells.

[0003] In existing technologies, the coolant inlet and outlet are typically located at opposite ends of the battery pack. Inside the battery pack, the coolant flows radially from the inlet to the outlet along the cylindrical cells. Because the coolant is heated by each cylindrical cell during flow, a temperature difference exists between the inlet and outlet. This can lead to temperature variations between the cylindrical cells near the inlet and outlet. Furthermore, the tortuous flow of the coolant among the cylindrical cells can result in varying cooling effects at different locations, further contributing to temperature differences between the cells. This reduces the uniformity of cell temperature and negatively impacts the battery pack's performance. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery pack that helps to improve the uniformity of cell temperature.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A battery pack includes a battery pack housing and a battery module disposed inside the battery pack housing;

[0007] The battery module can be divided inside the battery pack casing to form an inlet chamber and an outlet chamber located on both sides of the battery module, and the inlet chamber and the outlet chamber are connected to the external coolant circulation pipeline.

[0008] The battery module includes multiple module units arranged along a preset direction. Each module unit includes a module housing and a cylindrical battery cell disposed within the module housing. The axial direction of the cylindrical battery cell is the same as the preset direction.

[0009] The module housing has an internal mounting cavity for mounting the cylindrical battery cell, and two channels connecting the mounting cavity to the two ends of the cylindrical battery cell in the axial direction. The two channels can connect the mounting cavity to the liquid inlet cavity and the liquid outlet cavity, respectively.

[0010] Furthermore, the module housing includes a housing body having the mounting cavity, and a partition plate disposed at at least one end of the housing body; the housing body has an outwardly extending edge, the partition plate abuts against the edge and forms the channel with the housing body; a plurality of through holes communicating with the channel and the mounting cavity are provided on the end face of the housing body.

[0011] Furthermore, the housing body is provided with partitions at both ends along the axial direction of the cylindrical battery cell, and the edges of the two end faces are provided to abut against the corresponding partitions; in two adjacent module units, the two partitions on opposite sides of the two housing bodies are the same plate.

[0012] Furthermore, an outwardly extending support column is formed on the housing body, and the support column abuts against the partition plate.

[0013] Furthermore, the housing body includes a first portion and a second portion that are fastened together axially with the cylindrical battery cell, the first portion and the second portion being fastened together to form the mounting cavity.

[0014] Furthermore, both ends of the cylindrical battery cell pass through the housing body and extend into the two channels respectively, and each of the two channels is provided with a bus assembly for connecting the ends of the cylindrical battery cell.

[0015] Furthermore, it also includes a clamping assembly disposed within the battery pack housing, the clamping assembly including clamping plates disposed at both ends of the battery module, and a fixing rod penetrating each clamping plate and the battery module;

[0016] The fixing rod can connect the two clamping plates through fasteners, so that the two clamping plates clamp the battery module in a preset direction.

[0017] Furthermore, the fixing rod includes a screw, and the fastener includes a bolt screwed onto the screw and abutting against the clamping plate.

[0018] Furthermore, the clamping plate has a sealing structure on the side opposite to the battery module, and the sealing structure covers the end of the fixing rod.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] The battery pack described in this invention, by arranging multiple module units to form a battery module, can fully utilize the longitudinal space within the battery pack casing, improving the space utilization rate of the battery pack. This avoids the need for coolant to diffuse radially along the cylindrical cells due to excessively large cell arrangement areas, which would affect the smooth axial flow of the coolant. Furthermore, channels are provided at both ends of the mounting cavity, allowing coolant to flow axially between the cylindrical cells, reducing temperature differences between them and improving temperature uniformity, thereby ensuring the battery pack's performance.

[0021] Furthermore, the partition and the housing body form a channel, and the separate design of the partition and housing body facilitates processing and assembly, reducing the processing cost of the module housing. Multiple through holes are provided on the end face of the housing body, allowing for even distribution of coolant across the entire end face of the mounting cavity. Support pillars are formed on the housing body to abut against the partition, preventing deformation due to external forces. In adjacent module units, the two housing bodies are connected to the same partition, reducing the number of partitions required and saving materials.

[0022] Furthermore, the separate first and second parts snap together to form the main housing, facilitating the placement of each cylindrical battery cell. Both ends of the cylindrical battery cell extend into two channels and connect to a busbar assembly to electrically connect the individual cylindrical cells within the module unit. A clamping assembly is provided within the battery pack housing to hold both ends of the battery module, thus securing the multiple module units that constitute the battery module.

[0023] Furthermore, the fixing rod includes a threaded rod, and the fasteners include bolts screwed onto the threaded rod. Its structure is simple and reliable, facilitating the assembly of the clamping components. The clamping plate is equipped with a sealing structure that prevents coolant from flowing through the gap between the fixing rod and the clamping plate into the module housing, thus preventing coolant leakage from affecting the normal flow of coolant within the module unit.

[0024] Another objective of this invention is to provide an electrical device having a battery pack as described above.

[0025] The electrical equipment and / or battery pack described in this utility model have the same technical effects as the prior art, and will not be described in detail here. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is an overall structural view of the battery pack described in an embodiment of the present utility model;

[0028] Figure 2 This is an exploded view of the overall structure of the battery pack described in this embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the battery pack described in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the battery module described in an embodiment of the present invention.

[0031] Figure 5 for Figure 4 A sectional view at the location shown in AA;

[0032] Figure 6 for Figure 4 A cross-sectional view at the location shown in BB;

[0033] Figure 7 This is a schematic diagram of the clamping plate and sealing structure described in an embodiment of the present utility model;

[0034] Figure 8 This is a schematic diagram of the sealing structure described in an embodiment of the present utility model;

[0035] Figure 9 This is a schematic diagram of the module unit described in an embodiment of the present invention;

[0036] Figure 10 for Figure 9 A magnified view of the position shown in C.

[0037] Figure 11 This is an exploded view of the module unit described in an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the structure of the second part as described in an embodiment of the present utility model;

[0039] Figure 13 This is a schematic diagram of the structure of the first part described in an embodiment of the present utility model;

[0040] Figure 14 for Figure 13 A magnified view of the location shown in D;

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Battery pack casing; 1a. Liquid inlet chamber; 1b. Liquid outlet chamber; 101. Cylindrical body; 1011. Limiting structure; 102. End cap; 103. Liquid inlet; 104. Liquid outlet;

[0043] 2. Module unit; 2a. Mounting cavity; 2b. Channel;

[0044] 201. Module housing; 2011. Housing body; 2011a. First part; 2011b. Second part; 2012. Edge; 2013. Partition; 2014. Through hole; 2015. Support column;

[0045] 202. Cylindrical battery cell;

[0046] 203. Busbar assembly; 2031. Busbar unit; 2032. Output pole;

[0047] 204. Fixing strip;

[0048] 3. Clamping plate; 301. Card slot;

[0049] 4. Fixing rod; 401. Fastener;

[0050] 5. Sealing structure; 501. Raised edge. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0052] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0053] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they 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, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" 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 in light of the specific circumstances.

[0055] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] Example 1

[0057] This embodiment relates to a battery pack, the overall structure of which is as follows: Figure 1 , 2 As shown, this embodiment includes a battery pack housing 1 and a battery module disposed inside the battery pack housing 1. Wherein, as... Figure 3 , Figure 5 As shown, the battery module can be divided inside the battery pack housing 1 to form an inlet chamber 1a and an outlet chamber 1b located on both sides of the battery module, and the inlet chamber 1a and the outlet chamber 1b are connected to the external coolant circulation pipeline.

[0058] And, as Figure 4 , Figure 9 and Figure 11 As shown, the battery module includes multiple module units 2 arranged along a preset direction. Each module unit 2 includes a module housing 201 and cylindrical battery cells 202 disposed within the module housing 201, with the axial direction of the cylindrical battery cells 202 being the same as the preset direction. The module housing 201 has a mounting cavity 2a for mounting the cylindrical battery cells 202, and two channels 2b connecting the mounting cavity 2a to the two ends of the cylindrical battery cells 202 along their axial direction. The two channels 2b connect the mounting cavity 2a to an inlet cavity 1a and an outlet cavity 1b, respectively. In a specific implementation, the cylindrical battery cells 202 in this embodiment are configured as multiple cells arranged in a single layer of rows and columns.

[0059] As configured above, the coolant in the inlet chamber 1a can enter the mounting chamber 2a through the channel 2b and flow along the axial direction of the cylindrical cell 202. The coolant can exchange heat with the axial surface of the cylindrical cell 202, and then enter the outlet chamber 1b through the channel 2b at the other end of the mounting chamber 2a. Due to the limited axial length of the cylindrical cell 202, the temperature difference of the coolant at both ends of the mounting chamber 2a is relatively small. On the other hand, the temperature difference of the coolant at both ends of the mounting chamber 2a will only result in a certain temperature difference between the two ends of a single cylindrical cell 202 along its axial direction. Compared with the prior art, the temperature difference between each cylindrical cell 202 is smaller.

[0060] Furthermore, the coolant flows axially along the cylindrical cells 202, with a flow path that runs through the cylindrical cells 202. This avoids uneven coolant distribution caused by a meandering flow path, ensuring effective cooling for each cylindrical cell 202. Simultaneously, arranging multiple module units 2 to form a battery module fully utilizes the longitudinal space within the battery pack casing 1, improving space utilization. With the same number of cylindrical cells 202, the area of ​​each cylindrical cell 202 within a single module unit 2 is reduced, preventing excessively large areas from requiring radial diffusion of the coolant along the cylindrical cells 202, which would hinder smooth axial flow. Therefore, by providing channels 2b at both ends of the mounting cavity 2a, the coolant flows axially between the cylindrical cells 202, reducing temperature differences between them and improving temperature consistency, thus ensuring optimal battery pack performance.

[0061] Based on the above overview, specifically, in this embodiment, the sidewall of the module housing 201 has a fixing strip 204 extending along a predetermined direction, i.e., the axial direction of the cylindrical cell 202. Each fixing strip 204 on each module unit 2 is connected end-to-end, and at least two fixing strips 204 abut against the inner wall of the battery pack housing 1, thereby dividing the interior of the battery pack housing 1 into an inlet chamber 1a and an outlet chamber 1b. In a preferred embodiment, each fixing strip 204 abuts against the inner wall of the battery pack housing 1, and the fixing strip 204 is bonded to the battery pack housing 1 with structural adhesive. The inlet chamber 1a located on one side of the battery module is constructed to form a channel 2b structure between it and the fixing strip 204.

[0062] In addition, the coolant in this embodiment can be a conventional coolant known to those skilled in the art for immersion cooling of battery cells, such as fluorinated liquid or insulating oil, which has a good insulation effect.

[0063] As a specific form of implementation, such as Figure 9 , Figure 10 and Figure 11 As shown, the module housing 201 of this embodiment includes a housing body 2011 with a mounting cavity 2a, and a partition 2013 disposed at at least one end of the housing body 2011. The housing body 2011 has an outwardly extending edge 2012, and the partition 2013 abuts against the edge 2012, forming a channel 2b with the housing body 2011. A plurality of through holes 2014 communicating between the channel 2b and the mounting cavity 2a are provided on the end face of the housing body 2011. The separate design of the partition 2013 and the housing body 2011 facilitates processing and assembly, and helps to reduce the processing cost of the module housing 201.

[0064] When multiple module units 2 are arranged in a row, the partition 2013 can abut against another module unit 2, and the channel 2b formed by the partition 2013 and the housing body 2011 extends radially along the cylindrical cell 202 to facilitate communication between the mounting cavity 2a and the liquid inlet cavity 1a or the liquid outlet cavity 1b. Furthermore, multiple through holes 2014 are provided on the end face of the housing body 2011 to evenly distribute the coolant to the entire end face of the mounting cavity 2a, preventing insufficient local flow of coolant and thus reducing the cooling effect.

[0065] In specific implementation, the partition 2013 of this embodiment is connected to the edge 2012 of the shell body 2011 by conventional connection methods such as bonding and ultrasonic welding. In addition, the partition 2013 of this embodiment can be made of epoxy board to ensure the structural strength of the partition 2013.

[0066] Since the battery module is composed of multiple module units 2, in order to save materials and reduce production costs, the housing body 2011 in this embodiment is provided with partitions 2013 at both ends along the axial direction of the cylindrical cell 202, and each end face is provided with an edge 2012 that abuts against the corresponding partition 2013. In two adjacent module units 2, the two partitions 2013 on opposite sides of the two housing bodies 2011 are the same plate. This allows the two housing bodies 2011 of two adjacent module units 2 to share a common partition 2013, which reduces the number of partitions 2013 used, thereby saving materials and reducing production costs to a certain extent.

[0067] Since the baffle 2013 is only connected to the edge 2012 on the housing body 2011, in order to prevent the baffle 2013 from being squeezed and deformed, which would cause the channel 2b to be flattened and collapsed, thus affecting the normal flow of coolant, such as... Figure 12 , Figure 13 and Figure 14 As shown, in this embodiment, an outwardly extending support column 2015 is formed on the housing body 2011, and the support column 2015 abuts against the partition plate 2013. By providing the support column 2015 between the partition plate 2013 and the housing body 2011, the support column 2015 can support the partition plate 2013 and prevent the partition plate 2013 from being squeezed and deformed, thus affecting the flow of coolant in the channel 2b. In specific implementations, multiple support columns 2015 are configured in this embodiment to connect different positions of the partition plate 2013, thereby improving the support effect on the partition plate 2013.

[0068] Furthermore, to facilitate the placement of each cylindrical cell 202 within the mounting cavity 2a, the housing body 2011 of this embodiment includes a first portion 2011a and a second portion 2011b that are axially engaged with the cylindrical cells 202. The first portion 2011a and the second portion 2011b engage to form the mounting cavity 2a. This separate design of the first portion 2011a and the second portion 2011b facilitates the installation of the cylindrical cells 202 within the mounting cavity 2a, thereby simplifying the assembly of the module unit 2.

[0069] Specifically, the two ends of the cylindrical battery cell 202 pass through the housing body 2011 and extend into two channels 2b respectively. Each of the two channels 2b is provided with a busbar assembly 203 for connecting the ends of the cylindrical battery cell 202. Through the busbar assembly 203, the various cylindrical battery cells 202 in the module unit 2 can be electrically connected together to ensure that the module unit 2 outputs power to the outside of the battery pack. In a specific implementation, the busbar assembly 203 of this embodiment includes multiple busbar units 2031 and two output terminals 2032. The multiple busbar units 2031 can connect the various cylindrical battery cells 202 in series and parallel, and the two output terminals 2032 extend into the inlet chamber 1a or outlet chamber 1b in the aforementioned channels 2b to facilitate electrical connection between multiple module units 2. Meanwhile, the busbar unit 2031 and the output pole 2032 are provided with through holes to avoid the through holes 2014 and support pillars 2015 on the housing body 2011, so as to prevent the busbar assembly 203 from affecting the flow of coolant.

[0070] As a specific implementation, the battery pack in this embodiment further includes a clamping assembly disposed within the battery pack housing 1. The clamping assembly includes clamping plates 3 disposed at both ends of the battery module, and a fixing rod 4 penetrating each clamping plate 3 and the battery module. The fixing rod 4 connects the two clamping plates 3 via fasteners 401, allowing the two clamping plates 3 to clamp the battery module in a predetermined direction. By configuring the clamping assembly, each module unit 2 can be clamped in the predetermined direction, i.e., along the axial direction of the cylindrical cell 202, to ensure the connection strength between the module units 2.

[0071] Specifically, in this embodiment, the fixing rod 4 includes a screw, and the fastener 401 includes a bolt screwed onto the screw and abutting against the clamping plate 3. The bolt and screw combination is simple and reliable in structure, and facilitates the assembly of the clamping components. When the screw passes through each clamping plate 3 and the battery module, tightening the bolt screwed onto the screw allows the bolt to gradually press against the clamping plate 3, thereby fixing the module unit 2 in the battery module.

[0072] Finally, in this embodiment, the clamping plate 3 has a sealing structure 5 on the side opposite to the battery module, and the sealing structure 5 covers the end of the fixing rod 4. Figure 4 , Figure 7 and Figure 8 As shown, it can be understood that the fixing rod 4 penetrates the battery module, forming holes at both ends of the module housing for the fixing rod 4 to pass through. If coolant seeps into the module housing 201 from the inlet chamber 1a or outlet chamber 1b through the aforementioned holes, it will affect the normal flow of coolant inside the module housing. Therefore, by providing a sealing structure 5 to cover the end of the fixing rod 4, it is possible to prevent coolant in the battery pack housing 1 from leaking into the module housing through the gap between the fixing rod 4 and the clamping plate 3, thereby ensuring the cooling effect of each module unit 2.

[0073] In specific implementation, the sealing structure 5 is a rubber pad with an annular protrusion 501 formed on it, and the clamping plate 3 has a groove 301 for engaging the protrusion 501 on the rubber pad. Through the engagement of the protrusion 501 and the groove 301, the sealing structure 5 can be fixed on the clamping plate 3.

[0074] It is worth mentioning that the battery pack housing 1 in this embodiment includes a cylindrical body 101 extending along a preset direction, and two end caps 102 disposed at both ends of the cylindrical body 101. The battery pack housing 1 in this embodiment can be constructed in different shapes, such as cylinders, hexagonal prisms, cuboids, etc., to meet the actual installation needs of the battery pack. At the same time, the end caps 102 in this embodiment are provided with liquid inlets 103, and the cylindrical body 101 is provided with liquid outlets 104. Thus, when it is necessary to increase the length of the battery pack, multiple cylindrical bodies 101 can be connected end to end, and the liquid inlets 103 can be disposed on the end caps 102, which can ensure that the coolant can flow from the liquid inlet chambers 1a inside the battery pack housing 1 at both ends of the battery pack housing 1, so as to ensure that the coolant is evenly distributed to each module unit 2.

[0075] Based on this, in this embodiment, a portion of the edge of the clamping plate 3 abuts against the inner wall of the battery pack housing 1, thereby confining the liquid inlet chamber 1a or the liquid outlet chamber 1b between the two clamping plates 3. Specifically, as shown... Figure 3 , Figure 6 As shown, in a preferred embodiment, the outlet chamber 1b is located above the battery module and between the two clamping plates 3. The inlet chamber 1a is located below the battery module and at both ends of the battery module. Thus, the coolant flows from bottom to top through the module unit 2, ensuring efficient cooling of the cylindrical cell 202. At the same time, the edge of the sealing structure 5 can abut against the inner wall of the cylinder 101 to seal the gap between the clamping plates 3 and the cylinder 101.

[0076] Furthermore, in this embodiment, a limiting structure 1011 is provided on the inner wall of the cylindrical body 101. When the battery module is inserted into the cylindrical body 101 from one side, the limiting structure 1011 can abut against the battery module. By setting the limiting structure 1011, the depth of the battery module inserted into the cylindrical body 101 from one side can be limited, so as to ensure that the cavity sizes at both ends of the battery module are consistent and to ensure the uniformity of the coolant flow into the inlet cavity 1a. In this embodiment, the limiting structure 1011 is a baffle bar protruding from the inner wall of the cylindrical body 101.

[0077] In summary, the battery pack of this embodiment, by arranging multiple module units 2 to form a battery module, can fully utilize the longitudinal space within the battery pack casing 1, thereby improving the space utilization rate of the battery pack. Furthermore, the presence of channels 2b at both ends of the mounting cavity 2a allows coolant to flow axially between the cylindrical cells 202, reducing temperature differences between them and improving temperature consistency, thus ensuring the optimal performance of the battery pack.

[0078] Example 2

[0079] This embodiment relates to an electrical device. Structurally, the electrical device of this embodiment has a battery pack as described in Embodiment 1. In specific implementations, the electrical device of this embodiment can be an electric vehicle, an energy storage device, etc., and the electrical device is provided with a coolant circulation pipeline connected to the battery pack.

[0080] In this embodiment, the electrical device, through the aforementioned battery pack configuration, can reduce the temperature difference between the cylindrical cells 202, thereby improving the temperature consistency of the cells and ensuring the stability of the battery pack's energy output, thus enhancing the overall performance of the electrical device.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery pack, characterized in that: It includes a battery pack housing and a battery module disposed inside the battery pack housing; The battery module can be divided inside the battery pack casing to form an inlet chamber and an outlet chamber located on both sides of the battery module, and the inlet chamber and the outlet chamber are connected to the external coolant circulation pipeline. The battery module includes multiple module units arranged along a preset direction. Each module unit includes a module housing and a cylindrical battery cell disposed within the module housing. The axial direction of the cylindrical battery cell is the same as the preset direction. The module housing has an internal mounting cavity for mounting the cylindrical battery cell, and two channels connecting the mounting cavity to the two ends of the cylindrical battery cell in the axial direction. The two channels can connect the mounting cavity to the liquid inlet cavity and the liquid outlet cavity, respectively.

2. The battery pack according to claim 1, characterized in that: The module housing includes a housing body having the mounting cavity, and a partition plate disposed at at least one end of the housing body; The housing body has an outwardly extending edge, the partition abuts against the edge, and together with the housing body, forms the channel; The end face of the housing body is provided with multiple through holes that connect the channel and the mounting cavity.

3. The battery pack according to claim 2, characterized in that: The housing body is provided with partitions at both ends along the axial direction of the cylindrical battery cell, and each of the two end faces is provided with an edge that abuts against the corresponding partition. In two adjacent module units, the two partitions on opposite sides of the two housing bodies are the same plate.

4. The battery pack according to claim 2, characterized in that: The shell body has outwardly extending support columns that abut against the partition plate.

5. The battery pack according to claim 2, characterized in that: The housing body includes a first part and a second part that are fastened together axially on the cylindrical battery cell, the first part and the second part being fastened together to form the mounting cavity.

6. The battery pack according to claim 2, characterized in that: The two ends of the cylindrical battery cell pass through the housing body and extend into the two channels respectively, and each of the two channels is provided with a bus assembly for connecting the ends of the cylindrical battery cell.

7. The battery pack according to any one of claims 1 to 6, characterized in that: It also includes a clamping assembly disposed within the battery pack housing, the clamping assembly including clamping plates disposed at both ends of the battery module, and a fixing rod penetrating each clamping plate and the battery module; The fixing rod can connect the two clamping plates through fasteners, so that the two clamping plates clamp the battery module in a preset direction.

8. The battery pack according to claim 7, characterized in that: The fixing rod includes a screw, and the fastener includes a bolt screwed onto the screw and abutting against the clamping plate.

9. The battery pack according to claim 7, characterized in that: The clamping plate has a sealing structure on the side opposite to the battery module, and the sealing structure covers the end of the fixing rod.

10. An electrical appliance, characterized in that: The electrical equipment has a battery pack as described in any one of claims 1 to 9.

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