Battery and manufacturing method therefor

Abstract

Provided in the present application are a battery and a manufacturing method therefor. The battery comprises: a battery cell, a first terminal post and a second terminal post being respectively provided at two opposite ends of the battery cell; busbars, comprising a first busbar and a second busbar; and a case, comprising a housing and a first case cover. The housing comprises a cylindrical body and a partition plate which are fixedly arranged. The partition plate is located in the cylindrical body and defines, with the cylindrical body, a first cavity having an opening at one end, the battery cell is arranged in the first cavity, and one end of the battery cell abuts against the partition plate. The first case cover is arranged at one end of the housing to close the first cavity. A support portion is provided on a surface of the first case cover facing the battery cell, the first busbar is connected to the first terminal post, and the support portion abuts against the first busbar. The partition plate is provided with a terminal post hole, the second busbar is located on one side of the partition plate facing away from the battery cell, and the second terminal post passes through the terminal post hole and is connected to the second busbar.

Description

Batteries and their manufacturing methods

[0001] This application claims priority to Chinese Patent Application No. 202411957439.3, filed on December 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery and its manufacturing method. Background Technology

[0003] Low-voltage (e.g., 12V) battery packs are often designed to be simple and highly integrated due to cost considerations, space limitations, and the fact that their application scenarios are not as demanding as those of power batteries. Invention Overview

[0004] However, it is difficult to apply dual-channel cells with terminals and explosion-proof valves at both ends (such as large cylindrical dual-channel cells) to low-voltage battery packs, especially the welding difficulty of the cells to the integrated busbar (Cells Contact System, CCS, which consists of flexible circuit boards, plastic structural parts, copper and aluminum busbars, etc.) after they are put into the battery box.

[0005] This application provides a battery comprising: a battery cell, wherein a first terminal and a second terminal are respectively disposed at opposite ends of the battery cell; a battery plate, including a first battery plate and a second battery plate; a housing, including a shell and a first cover, wherein the shell includes a fixedly disposed cylindrical body and a partition, the partition being located within the cylindrical body and defining a first cavity with one end open, the battery cell being disposed within the first cavity, and one end of the battery cell abutting against the partition; the first cover being disposed at one end of the shell to close the first cavity; wherein a support portion is provided on the side of the first cover facing the battery cell, the first battery plate is connected to the first terminal, and the support portion abuts against the first battery plate; a terminal hole is formed in the partition, the second battery plate is located on the side of the partition away from the battery cell, and the second terminal passes through the terminal hole and is connected to the second battery plate.

[0006] This application also provides a method for manufacturing a battery, the method comprising: providing a battery cell, wherein a first terminal and a second terminal are respectively disposed at opposite ends of the battery cell; providing a housing, the housing comprising a fixedly disposed cylindrical body and a separator, the separator being located inside the cylindrical body and defining a first cavity with one end open therein, the separator having a terminal hole, the battery cell being disposed in the first cavity, and the second terminal passing through the terminal hole, with one end of the battery cell abutting against the separator; providing a first tab, the first tab being connected to the first terminal; providing a first cover, one side of the first cover having a support portion, the first cover being disposed at one end of the housing to close the first cavity, and the support portion abutting against the first tab; and providing a second tab, the second tab being fixed to the side of the separator away from the first cavity and connected to the second terminal. Beneficial effects

[0007] The battery provided in this application allows for the connection of a first electrode plate to a first terminal post by abutting one end of the battery cell against a separator. At this time, the separator provides support to the battery cell, thereby making the first electrode plate fit against the first terminal post of the battery cell, which facilitates connection. Next, the support part of the first casing cover abuts against the first electrode plate, and then the second terminal post is connected to the second electrode plate. At this time, the support part of the first casing cover provides support to the battery cell, thereby making the second electrode plate fit against the second terminal post of the battery cell, which facilitates welding. At the same time, it can reduce the stress on the already welded first electrode plate and reduce the probability of breakage of the first electrode plate weld joint. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the battery provided in this application from a first-view perspective.

[0009] Figure 2 is an exploded view of the battery provided in this application from a second perspective (the first and second sealant layers are not shown in the figure).

[0010] Figure 3 is a structural schematic diagram of the box provided in this application (the first box cover and the second box cover are not shown in the figure).

[0011] Explanation of reference numerals in the attached drawings: Cell-1; First explosion-proof valve-12; First valve plate-2; Second valve plate-3; Housing-4; Shell-41; Cylinder-411; First limiting part-4111; Separator-412; Terminal hole-4121; Second cavity-413; First cover-42; Support part-421; Second receiving cavity-422; First protrusion-423; Second cover-43; Second protrusion-431; Divider-44; First receiving cavity-441; First channel-45; Second channel-46; Second explosion-proof valve-47; Battery management system module-5; First sealant layer-6; Second sealant layer-7. Embodiments of the present invention

[0012] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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 this application according to the specific circumstances.

[0013] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0014] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0015] Firstly, referring to Figures 1-3, embodiments of this application provide a battery, comprising:

[0016] Battery cell 1, with a first terminal and a second terminal respectively provided at opposite ends;

[0017] The tablets include the first tablet 2 and the second tablet 3;

[0018] The housing 4 includes a shell 41 and a first cover 42. The shell 41 includes a fixedly disposed cylindrical body 411 and a partition 412. The partition 412 is located inside the cylindrical body 411 and defines a first cavity with one end open. The battery cell 1 is disposed in the first cavity, and one end of the battery cell 1 abuts against the partition 412. The first cover 42 is disposed at one end of the shell 41 to close the first cavity. The side of the first cover 42 facing the battery cell 1 is provided with a support part 421. The first electrode 2 is connected to the first pole post, and the support part 421 abuts against the first electrode 2. The partition 412 has a pole post hole 4121. The second electrode 3 is located on the side of the partition 412 away from the battery cell 1. The second pole post passes through the pole post hole 4121 and is connected to the second electrode 3.

[0019] It is understandable that when welding the electrode plate to the terminal post, the electrode plate needs to be pressed tightly by welding equipment to ensure that the electrode plate and the terminal post are in close contact. After the battery cell 1 is placed into the first cavity, the first electrode plate 2 can be welded to the first terminal post by welding equipment. At this time, the end of the battery cell 1 located at the bottom of the cavity abuts against the partition plate 412, so that the partition plate 412 can provide support for the battery cell 1, allowing the welding equipment to press and fit the first electrode plate 2 to the first terminal post, thus facilitating the welding of the two. After the first electrode plate 2 is connected to the first terminal post, the second terminal post is then welded to the second electrode plate 3 by welding equipment. At this time, the support part 421 of the first box cover abuts against the first electrode plate 2, so that the support part 421 can provide support for the battery cell 1, allowing the welding equipment to press and fit the second electrode plate 3 to the second terminal post, thus facilitating the welding of the two. At the same time, since the support part 421 bears the pressing force of the welding equipment, the probability of breakage of the weld point of the first electrode plate 2 can be reduced.

[0020] It is understandable that the partition plate 412 has a terminal hole 4121, through which the second terminal passes. The second plate 3 is located on the side of the partition plate 412 away from the battery cell 1. This allows the second plate 3 and the second terminal to be welded outside the first cavity after the battery cell 1 is placed in the first cavity, thus facilitating the welding operation. At the same time, when the battery cell 1 abuts against the partition plate 412, the second terminal passing through the terminal hole 4121 allows the end face of the battery cell 1 to fit better with the partition plate 412, thereby improving the support force of the partition plate 412 for the battery cell 1.

[0021] As an example, the battery of this application may include multiple battery cells 1, which constitute a battery pack. The multiple battery cells 1 can be arranged in an S-shape within the first cavity, thereby reducing the size of the battery pack along the arrangement direction of the battery cells 1. Alternatively, the multiple battery cells 1 can be arranged in a straight line within the first cavity, thereby reducing the size of the battery pack perpendicular to the arrangement direction of the battery cells 1. Furthermore, the size of the battery pack can be adjusted by adjusting the arrangement of the battery cells. The separator 412 is a plate-like structure disposed within the cylindrical body 411. The separator 412 can be perpendicular to the axial direction of the cylindrical body 411, and its shape can match the shape of the inner surface of the cylindrical body 411. Of the first and second terminals, one is the positive terminal and the other is the negative terminal. The cylindrical body 411 and the separator 412 can be integrally formed to form the shell 41. The shape of the cylindrical body 411 can be square, circular, or other irregular shapes. The support portion 421 abuts against the first pad 2, thereby providing support to the first pad 2, and in turn, the support portion 421 provides support to the battery cell 1. The support portion 421 can be of any shape, as long as it can provide support to the first pad 2.

[0022] In one embodiment, the partition 412 and the cylinder 411 further define a second cavity 413 with one end open, the second cavity 413 being independent of the first cavity; the housing 4 also includes a second cover 43, which is disposed at the other end of the housing 41 to close the second cavity 413, and the second plate 3 is located inside the second cavity 413.

[0023] It is understood that the partition 412 is located inside the cylindrical body 411, thereby dividing the space inside the cylindrical body 411 into a first cavity and a second cavity 413. The first cavity is used to accommodate the battery cell 1, and the second cavity 413 can be used to accommodate other components of the battery pack, such as the battery management system module 5. At the same time, the second electrode plate 3 is disposed in the second cavity 413, so that the second electrode plate 3 can be welded to the second terminal through the second cavity 413. After the second electrode plate 3 is welded to the second terminal, the second cover 43 can close the second cavity 413, thereby enclosing the components inside the second cavity 413.

[0024] In one embodiment, the housing 4 further includes a partition 44, which is filled in the first cavity. A first receiving cavity 441 is provided through the partition 44, and the battery cell 1 is housed in the first receiving cavity 441 and adapted to the first receiving cavity 441.

[0025] It is understood that the shape of the separator 44 can match the inner surface shape of the first cavity, thereby allowing the separator 44 to be fixed within the first cavity. The separator 44 and the cylinder 411 can be manufactured in one piece, which makes the separator 44 more stable within the cylinder 411 and also facilitates manufacturing. The separator 412 can abut against the separator 44, thereby facilitating the passage of the first terminal post through the terminal post hole 4121 on the separator 412, and further facilitating the connection between the first terminal post and the second electrode plate 3. The separator 412, separator 44, and cylinder 411 can be manufactured in one piece, thereby improving the stability of the battery pack and facilitating manufacturing.

[0026] In one embodiment, the first box cover 42 is cap-shaped, and a second receiving cavity 422 communicating with the first receiving cavity 441 is formed on the first box cover 42.

[0027] It can be understood that the first cover 42 is cap-shaped, and the cavity of the cap-shaped structure is the second receiving cavity 422, and the support part 421 is located inside the second receiving cavity 422. The second receiving cavity 422 is connected to the first receiving cavity 441, so that the support part 421 inside the second receiving cavity 422 can provide support when the second plate 3 is connected to the second pole post.

[0028] In one embodiment, a first explosion-proof valve 12 is provided at each of the opposite ends of the battery cell 1. The two first explosion-proof valves 12 are respectively connected to the second cavity 413 and the second receiving cavity 422. The housing 4 is also provided with a first channel 45 that penetrates the partition 44 and the partition 412. The first channel 45 is independent of the first receiving cavity 441. The second cavity 413 and the second receiving cavity 422 are connected through the first channel 45. The housing 4 is also provided with a second explosion-proof valve 47, which is connected to the second receiving cavity 422.

[0029] It is understood that each end of the battery cell 1 (e.g., a large cylindrical double-pass battery cell) has a first explosion-proof valve 12. The two first explosion-proof valves 12 are respectively connected to the second cavity 413 and the second receiving cavity 422. When the battery cell 1 experiences thermal runaway, the first explosion-proof valves 12 at both ends of the battery cell 1 may release gas, which will then enter the second cavity 413 and the second receiving cavity 422 respectively. A through hole can be formed on the partition plate 412, and the first explosion-proof valve 12 at one end of the battery cell 1 can be placed in this through hole, thereby allowing the first explosion-proof valve 12 at one end of the battery cell 1 to communicate with the second cavity 413. A first channel 45 penetrates the partition body 44 and the partition plate 412, thereby connecting the second cavity 413 and the second receiving cavity 422 through the first channel 45. The second explosion-proof valve 47 is disposed on the housing 4. Alternatively, the second explosion-proof valve 47 can be located on the first housing cover 42. When the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 in the second cavity 413 can sequentially pass through the second cavity 413, the first channel 45, the second receiving cavity 422, and the second explosion-proof valve 47 to exit the battery pack. The gas discharged from the first explosion-proof valve 12 in the second receiving cavity 422 can sequentially pass through the second receiving cavity 422 and the second explosion-proof valve 47 to exit the battery pack. Alternatively, the second explosion-proof valve 47 can be located on the second housing cover 43. When the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 in the second cavity 413 can sequentially pass through the second cavity 413 and the second explosion-proof valve 47 to exit the battery pack. The gas discharged from the first explosion-proof valve 12 in the second receiving cavity 422 can sequentially pass through the second receiving cavity 422 and the second explosion-proof valve 47 to exit the battery pack. The gas is discharged to the outside of the battery pack via the second receiving cavity 422, the first channel 45, the second cavity 413, and the second explosion-proof valve 47. The second explosion-proof valve 47 can be located on the cylinder 411. In this case, the first channel 45 can be positioned at the edge of the separator 44 and the partition 412, so that the housing 41 is located beside the first channel 45, and the second explosion-proof valve 47 is connected to the second cavity 413 and the second receiving cavity 422. When the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 in the second cavity 413 can be discharged to the battery pack sequentially via the second cavity 413, the first channel 45, and the second explosion-proof valve 47. Similarly, the gas discharged from the first explosion-proof valve 12 in the second receiving cavity 422 can be discharged to the outside of the battery pack sequentially via the second receiving cavity 422, the first channel 45, and the second explosion-proof valve 47. In this way, when the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 at both ends can be effectively discharged to the outside of the battery pack.

[0030] In one embodiment, a second channel 46 is also provided on the housing 4. The second channel 46 includes a first segment penetrating the side wall of the cylinder 411 and a second segment opened in the partition 44. The first segment and the second segment are connected. The second channel 46 is independent of the first receiving cavity 441 and the first channel 45. The second segment connects the second receiving cavity 422 to the outside or the second segment connects the second cavity 413 to the outside. A second explosion-proof valve 47 is provided on the cylinder 411 and is connected to the first segment.

[0031] It is understandable that the position of the second channel 46 can be set as needed. The second channel 46 can be located in the middle of the battery pack, and the extension direction of the second channel 46 can be parallel to the axis of the cell 1, thereby improving the exhaust speed and facilitating the arrangement of the cell 1.

[0032] It is understandable that the second explosion-proof valve 47 is installed on the cylinder 411 and is connected to the first sub-section, which means that the second explosion-proof valve 47 can be installed inside the first sub-section. The second sub-section connects the second receiving cavity 422 to the outside. When the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 in the second cavity 413 can be discharged to the outside of the battery pack in sequence through the second cavity 413, the first channel 45, the second receiving cavity 422, the second sub-section, and the second explosion-proof valve 47. The gas discharged from the first explosion-proof valve 12 in the second receiving cavity 422 can be discharged to the outside of the battery pack in sequence through the second receiving cavity 422, the second sub-section, and the second explosion-proof valve 47. The second sub-section connects the second cavity 413 to the outside. When the battery cell 1 experiences thermal runaway, the gas discharged from the first explosion-proof valve 12 in the second cavity 413 can be discharged to the battery pack in sequence through the second cavity 413, the second sub-section, and the second explosion-proof valve 47. The gas discharged from the first explosion-proof valve 12 in the second receiving cavity 422 can be discharged to the outside of the battery pack in sequence through the second receiving cavity 422, the first channel 45, the second cavity 413, the second sub-section, and the second explosion-proof valve 47. Thus, the second explosion-proof valve 47 can be located on the cylinder 411, and the first channel 45 can also be located in the middle of the battery pack. Connecting the second sub-section to the second receiving cavity 422 and the outside can reduce the impact of the gas discharged from the first explosion-proof valve 12 on the components in the first cavity.

[0033] In one embodiment, the first pad 2 is connected to the first pole post, and the support portion 421 abuts against the connection between the first pad 2 and the first pole post.

[0034] It is understandable that the first plate 2 and the first pole post can be connected by welding, and the support part 421 can be abutted against the connection point of the two, which can provide support force to the connection point and reduce the probability of breakage caused by stress at the connection point. The welding point of the first plate 2 and the first pole post is mostly circular, and the shape of the support part 421 can be a cylinder that matches the welding point.

[0035] In one embodiment, the second bar plate 3 is integrally disposed on the partition plate 412.

[0036] It is understandable that the second plate 3 can be fixed to the partition plate 412 by hot riveting, which facilitates the welding of the second plate 3 to the second pole post.

[0037] In one embodiment, the first plate 2 is welded to the first pole post.

[0038] In one embodiment, the second plate 3 is welded to the second pole post.

[0039] In one embodiment, the battery further includes a battery management system module 5, which is disposed within the second cavity 413 and electrically connected to the battery cell 1.

[0040] It is understood that the battery management system module 5 includes a BMS (Battery Management System), whose main function is to intelligently manage and maintain each cell 1, prevent overcharging and over-discharging of the cell 1, extend the lifespan of the cell 1, and monitor the status of the cell 1. The battery management system module 5 includes a control module, a data acquisition harness for collecting data from the cell 1, an NTC thermistor, and a connector for connecting the data acquisition harness to the control module. The battery management system module 5 is located within the second cavity 413, thus isolating the battery management system module 5 from the cell 1 and facilitating the installation of the cell 1. The data acquisition harness, NTC thermistor, and connector for connecting the data acquisition harness to the control module can be integrated onto the separator 412, thereby reducing the number of mounting brackets, reducing material usage, and simplifying battery assembly steps.

[0041] In one embodiment, a first box cover 42 extends into a first cavity, and a first sealing adhesive layer 6 is provided between the first box cover 42 and the cylinder 411.

[0042] It is understood that there is a first sealing layer 6 between the first cover 42 and the cylinder 411, which can achieve a seal between the first cover 42 and the cylinder 411.

[0043] In one embodiment, the second cover 43 extends into the second cavity 413, and a second sealing layer 7 is provided between the second cover 43 and the cylinder 411.

[0044] It is understandable that by setting a second sealing layer 7 between the second cover 43 and the cylinder 411, a seal can be achieved between the second cover 43 and the cylinder 411.

[0045] In one embodiment, the first box cover 42 is cap-shaped, and the edge of the first box cover 42 is provided with a first protrusion 423 extending toward the cylinder 411. The cylinder 411, the first box cover 42 and the first protrusion 423 define a first receiving groove, and the first sealing layer 6 is located in the first receiving groove.

[0046] It is understood that a first protrusion 423 extending towards the cylindrical body 411 is provided on the edge of the cap-shaped first lid 42. After the first lid 42 extends into the cylindrical body 411, a first receiving groove is formed between the first protrusion 423 and the cylindrical body 411, which can be used to accommodate the first sealant layer 6. This reduces the probability of sealant leaking into the cylindrical body 411 from between the edge of the first lid 42 and the cylindrical body 411, allowing the sealant to fill the first receiving groove, thereby improving the sealing performance between the first lid 42 and the cylindrical body 411. The side of the first protrusion 423 facing the cylindrical body 411 can be clearance-fitted with the cylindrical body 411.

[0047] In one embodiment, the second box cover 43 is cap-shaped, and the edge of the second box cover 43 is provided with a second protrusion 431 extending toward the cylinder 411. The cylinder 411, the second box cover 43 and the second protrusion 431 define a second receiving groove, and the second sealing layer 7 is located in the second receiving groove.

[0048] It is understood that a second protrusion 431 extending towards the cylinder 411 is provided on the edge of the cap-shaped second lid 43. After the second lid 43 extends into the cylinder 411, a second receiving groove is formed between the second protrusion 431 and the cylinder 411, which can be used to accommodate the second sealant layer 7. This reduces the probability of sealant leaking into the cylinder 411 from between the edge of the second lid 43 and the cylinder 411, allowing the sealant to fill the second receiving groove and thus improving the sealing performance between the second lid 43 and the cylinder 411. The side of the second protrusion 431 facing the cylinder 411 can be clearance-fitted with the cylinder 411.

[0049] In one embodiment, the cylinder 411 is further provided with a first limiting part 4111 located in the second cavity 413, and the second box cover 43 abuts against the first limiting part 4111.

[0050] It is understood that by providing a first limiting part 4111 within the second cavity 413 and having the first limiting part 4111 abut against the second cover 43, the position of the second cover 43 can be restricted when it is inserted into the second cavity 413, thereby preventing the second cover 43 from squeezing the components inside the second cavity 413 and facilitating the installation of the second cover 43. The first limiting part 4111 can be provided at the edge of the second cavity 413, so that it can abut against the second protrusion 431 of the second cover 43. Multiple first limiting parts 4111 can be provided, and they can be evenly distributed around the second cavity 413, thereby better limiting the depth to which the second cover 43 extends into the second cavity 413.

[0051] In one embodiment, the edge of the first lid 42 abuts against the partition 44.

[0052] It is understood that by having the edge of the first lid 42 abut against the partition 44, the position of the first lid 42 can be restricted when it is placed inside the cylinder 411, thereby facilitating the installation of the first lid 42. The first lid 42 is cap-shaped, and its edge has a second protrusion 431 extending towards the cylinder 411. The second protrusion 431 can abut against the partition 44, thereby better restricting the depth to which the second lid 43 extends into the second cavity 413.

[0053] Secondly, embodiments of this application provide a method for manufacturing a battery, comprising the following steps:

[0054] A battery cell 1 is provided, and a first terminal and a second terminal are respectively provided on opposite ends of the battery cell 1;

[0055] A housing 41 is provided, which includes a fixedly disposed cylindrical body 411 and a partition 412. The partition 412 is located inside the cylindrical body 411 and defines a first cavity with one end open. A terminal hole 4121 is provided on the partition 412. The battery cell 1 is disposed in the first cavity, and a second terminal is inserted through the terminal hole 4121. One end of the battery cell 1 abuts against the partition 412.

[0056] Provide a first electrode plate 2 and connect the first electrode plate 2 to the first pole post;

[0057] A first box cover 42 is provided, and a support part 421 is provided on one side of the first box cover 42. The first box cover 42 is placed at one end of the housing 41 to close the first cavity, and the support part 421 abuts against the first plate 2.

[0058] A second bar plate 3 is provided, which is fixed to the side of the partition 412 away from the first cavity and connected to the second pole post.

[0059] It is understandable that during battery manufacturing, the battery cell 1 is first placed into the first cavity. When a separator 44 is provided within the first cavity, the battery cell 1 is placed into the first receiving cavity 441 within the separator 44, and the second terminal is inserted into the terminal hole 4121 on the separator 412. The end of the battery cell 1 closest to the separator 412 abuts against the separator 412. At this time, the first electrode plate 2 is welded to the first terminal using welding equipment, with the separator 412 bearing the pressure of the welding equipment. Next, the first cover 42 is placed into the cylinder 411 and connected with sealant. At this time, the support portion 421 on the first cover 42 abuts against the first electrode plate 2. Then, the second electrode plate 3 is welded to the second terminal using welding equipment, with the first cover 42 bearing the pressure of the welding equipment. To make the battery cell 1 more stably fixed within the first receiving cavity 441, structural adhesive can be applied to the battery cell 1 and the first receiving cavity 441 after the battery cell 1 is placed in the casing.

[0060] In one embodiment, the partition 412 and the cylindrical body 411 further define a second cavity 413 with one end open, the second cavity 413 being independent of the first cavity, and the method of manufacturing the battery further includes:

[0061] Provides a second cover 43 and a battery management system module 5;

[0062] The battery management system module 5 is placed inside the second cavity 413 and connected to the battery cell 1;

[0063] The second cover 43 is placed at the other end of the housing 41 to close the second cavity 413.

[0064] It is understood that the battery management system module 5 includes a control module, a data acquisition harness for collecting data from cell 1, an NTC thermistor, and a connector for connecting the data acquisition harness and the control module. The data acquisition harness, NTC thermistor, and connector for connecting the data acquisition harness and the control module can be integrated onto the separator 412 before cell 1 is placed into the housing 4, or they can be integrated onto the separator 412 after the second contact plate 3 is connected to the second terminal. The control module can be placed into the second cavity 413 after the second contact plate 3 is connected to the second terminal, thus facilitating the connection between the second contact plate 3 and the second terminal. Finally, the second cover 43 is connected to the housing 41, thereby achieving a seal inside the housing 4.

Claims

1. A battery, comprising: A battery cell, wherein a first terminal and a second terminal are respectively disposed at opposite ends of the battery cell; Barb pills, including first-stage and second-stage barbiturates; The housing includes a shell and a first cover. The shell includes a fixedly disposed cylindrical body and a partition. The partition is located inside the cylindrical body and defines a first cavity with one end open. The battery cell is disposed in the first cavity, and one end of the battery cell abuts against the partition. The first cover is disposed at one end of the shell to close the first cavity. A support portion is provided on the side of the first cover facing the battery cell. A first electrode plate is connected to a first terminal post, and the support portion abuts against the first electrode plate. A terminal post hole is opened on the partition. A second electrode plate is located on the side of the partition away from the battery cell. The second terminal post passes through the terminal post hole and is connected to the second electrode plate.

2. The battery according to claim 1, wherein, The partition and the cylinder further define a second cavity with one end open, the second cavity being independent of the first cavity; the box also includes a second box cover, the second box cover being disposed at the other end of the housing to close the second cavity, and the second plate being located in the second cavity.

3. The battery according to claim 2, wherein, The housing also includes a partition, which fills the first cavity. A first receiving cavity is provided through the partition, and the battery cell is housed in the first receiving cavity and adapted to the first receiving cavity.

4. The battery according to claim 3, wherein, The first box cover is cap-shaped, and a second receiving cavity is formed on the first box cover that communicates with the first receiving cavity.

5. The battery according to claim 4, wherein, The battery cell is provided with a first explosion-proof valve at each of its two opposite ends, and the two first explosion-proof valves are respectively connected to the second cavity and the second receiving cavity; the housing is also provided with a first channel penetrating the separator and the partition, the first channel is independent of the first receiving cavity, the second cavity and the second receiving cavity are connected through the first channel, and the housing is also provided with a second explosion-proof valve, the second explosion-proof valve is connected to the second receiving cavity.

6. The battery according to claim 5, wherein, The housing is also provided with a second channel, which includes a first segment penetrating the side wall of the cylinder and a second segment opened in the partition body. The first segment and the second segment are connected. The second channel is independent of the first receiving cavity and the first channel. The second segment connects the second receiving cavity to the outside or connects the second cavity to the outside. The second explosion-proof valve is provided on the cylinder and is connected to the first segment.

7. The battery according to claim 1, wherein, The first pad is connected to the first electrode post, and the support portion abuts against the connection between the first pad and the first electrode post; and / or The second bar is integrally disposed on the partition; and / or The first electrode plate is welded to the first pole post; and / or The second plate is welded to the second pole post.

8. The battery according to claim 2, further comprising a battery management system module, wherein the battery management system module is disposed in the second cavity and electrically connected to the battery cell.

9. The battery according to claim 2, wherein, The first box cover extends into the first cavity, and a first sealing adhesive layer is provided between the first box cover and the cylinder; The second box cover extends into the second cavity, and a second sealing layer is provided between the second box cover and the cylinder.

10. The battery according to claim 9, wherein, The first box cover is cap-shaped, and the edge of the first box cover has a first protrusion extending toward the cylinder. The cylinder, the first box cover and the first protrusion define a first receiving groove, and the first sealing layer is located in the first receiving groove. The second box cover is cap-shaped, and the edge of the second box cover has a second protrusion extending toward the cylinder. The cylinder, the second box cover and the second protrusion define a second receiving groove, and the second sealing layer is located in the second receiving groove.

11. The battery according to claim 3, wherein, The cylindrical body is further provided with a first limiting part located within the second cavity, and the second box cover abuts against the first limiting part; and / or The edge of the first box cover abuts against the partition.

12. A method for manufacturing a battery, comprising: A battery cell is provided, wherein a first terminal and a second terminal are respectively disposed on opposite ends of the battery cell; A housing is provided, the housing including a fixedly disposed cylindrical body and a partition plate, the partition plate being located inside the cylindrical body and defining a first cavity with one end open, the partition plate having an electrode post hole, the battery cell being disposed in the first cavity, and the second electrode post being inserted through the electrode post hole, and one end of the battery cell abutting against the partition plate; Provide a first pad and connect the first pad to the first electrode post; A first box cover is provided, and a support portion is provided on one side of the first box cover. The first box cover is disposed at one end of the housing to close the first cavity, and the support portion abuts against the first plate. A second pad is provided, which is fixed to the side of the partition away from the first cavity and connected to the second pole.

13. The method for manufacturing a battery according to claim 12, wherein, The partition and the cylindrical body further define a second cavity with one end open, the second cavity being independent of the first cavity, and the method of manufacturing the battery further includes: Provides a second cover and a battery management system module; The battery management system module is placed inside the second cavity and connected to the battery cell; The second cover is placed at the other end of the housing to close the second cavity.

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