Battery

Abstract

The utility model provides a battery which comprises a shell, battery cells, a discharge joint, a lead row and a BMS (battery management system) module, the side wall of the shell is provided with an open hole, a plurality of battery cells are stacked in the shell, an avoiding cavity communicated with the open hole is formed between the plurality of battery cells and the shell, the discharge joint is arranged in the open hole, and the lead row is arranged in the avoiding cavity. The first end of the wire bar extends into the avoiding cavity to be connected with the discharging connector, the BMS module is arranged in the shell, and the second end of the wire bar is connected with the BMS module. According to the battery disclosed by the invention, the hole is formed in the side wall of the shell, and the avoiding cavity formed by the plurality of battery cells and communicated with the hole, the arrangement structure of the plurality of battery cells and the matching structure of the wire row and the discharge connector are beneficial to reasonably utilizing the internal space of the shell, so that the utilization rate of the internal space of the shell is improved, and the energy density of the battery is improved; therefore, the problem that the energy density of the battery is affected due to the fact that the utilization rate of the internal space of the shell of the battery in the prior art is low is solved.

Description

Technical Field

[0001] This application relates to the field of battery-related technology, and more specifically, to a battery. Background Technology

[0002] With the continuous advancement of new energy technologies, especially the rapid development of electric vehicles and energy storage systems, the demand for energy density, cost control, and space optimization in battery packs is increasing. As a core component of new energy systems, the arrangement of cells within the battery pack has a crucial impact on the overall system performance. Traditional battery pack cell arrangement designs often follow a simple symmetrical principle, meaning the cells are evenly distributed within the battery pack casing. This design simplifies the battery pack structure to some extent, facilitating production and maintenance. However, this symmetrical arrangement reveals its limitations when faced with specific space constraints. In traditional designs, the number of cells connected in series (i.e., the number of cells connected in series) is often an odd or even multiple, limiting the design flexibility of the battery pack.

[0003] In existing technologies, the installation of conductive components inside the battery casing requires additional space within the casing, necessitating an expansion of the casing's length and height. This drawback becomes apparent when considering the copper busbars between the BMS (Battery Management System) and the discharge interface. Due to the rigidity of the cell arrangement, space must be reserved to accommodate the copper busbar connections. These busbars not only handle the electrical connections between cells and between cells and external interfaces but also must consider electrical safety and thermal management requirements, often requiring significant height space. This directly increases the size of the battery pack casing, thereby affecting the energy density of the battery pack within a limited volume, negatively impacting the overall performance and cost control of the battery pack.

[0004] As can be seen from the above, the current batteries suffer from low internal space utilization in the casing, which affects the battery's energy density. Utility Model Content

[0005] The main objective of this invention is to provide a battery that solves the problem of low internal space utilization in the casing of existing batteries, which affects the energy density of the battery.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery is provided, comprising a casing, battery cells, a discharge connector, a lead busbar, and a BMS module. The casing has an opening on its side wall, and multiple battery cells are disposed thereon, stacked inside the casing. A clearance cavity communicating with the opening is formed between the multiple battery cells and the casing. The discharge connector is disposed in the opening, and the first end of the lead busbar extends into the clearance cavity and connects to the discharge connector. The BMS module is disposed inside the casing, and the second end of the lead busbar is connected to the BMS module.

[0007] Furthermore, along the length of the housing, a first placement area and a second placement area are formed inside the housing. The BMS module is disposed inside the first placement area, the battery cell is disposed inside the second placement area, and the opening is disposed on the side wall of the second placement area.

[0008] Furthermore, the opening is located on the sidewall of the second placement area away from the BMS module.

[0009] Furthermore, each clearance cavity is connected to at least one opening.

[0010] Furthermore, one clearance cavity is provided, which is formed in the middle region of the side wall along the width direction of the shell; or when multiple clearance cavities are provided, the multiple clearance cavities are spaced apart along the peripheral wall surface of the shell.

[0011] Furthermore, multiple battery cells are stacked along the length and width of the casing to form a battery cell assembly, with a clearance cavity formed on the outer periphery of the battery cell assembly.

[0012] Furthermore, the battery also includes a positioning structure disposed between the outer periphery of the cell assembly and the inner wall surface of the casing. The positioning structure is disposed on the bottom surface of the casing, and the thickness of the positioning structure is not greater than the distance between the opening and the bottom surface of the casing.

[0013] Furthermore, the conductor bar is made of metal.

[0014] Furthermore, the conductor bar includes an intermediate plate segment disposed on the top of the battery cell, and the conductor bar also includes a first plate segment and a second plate segment disposed at both ends of the intermediate plate segment. The first plate segment extends toward the bottom plate side of the housing and extends into the clearance cavity, and the second plate segment extends toward the bottom plate side of the housing and connects to the BMS module.

[0015] Furthermore, the intermediate plate segment includes a first segment, a second segment, and a third segment connected sequentially along the length direction of the shell. The first segment is connected to the first plate segment, and the third segment is connected to the second plate segment. The first segment and the third segment are staggered along the width direction of the shell.

[0016] By applying the technical solution of this utility model, the battery of this application adopts an opening on the side wall of the casing. The avoidance cavity formed by multiple cells and communicating with the opening provides avoidance space for the connection between the lead busbar and the discharge connector. Thus, the connection area between the lead busbar and the discharge structure does not need to occupy space in the height direction of the casing, nor does it require lengthening the casing due to the installation of the discharge connector. The arrangement structure of multiple cells, the cooperation structure of the lead busbar and the discharge connector of this application are conducive to the rational use of the internal space of the casing, improving the utilization rate of the internal space of the casing and increasing the energy density of the battery. At the same time, the structural design of this application can make the battery suitable for installation scenarios of different sizes, thereby improving the applicability of the battery pack.

[0017] This application facilitates the installation of the wire bar and the discharge connector by connecting them at the clearance cavity, thereby improving the battery assembly efficiency. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 A top view of the internal structure of the battery of this invention is shown, wherein the BMS module is not shown;

[0020] Figure 2 A three-dimensional structural diagram of the internal structure of the battery of this utility model is shown, wherein the BMS module is not shown;

[0021] Figure 3 A top view of the battery casing of this utility model is shown;

[0022] Figure 4 A three-dimensional structural schematic diagram of the conductor bar of this utility model is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Housing; 110. Clearance cavity; 20. Battery cell; 30. Conductor bar; 310. Intermediate plate segment; 311. First segment; 312. Second segment; 313. Third segment; 320. First plate segment; 330. Second plate segment; 40. Discharge connector; 50. Positioning structure. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] To address the problem of low internal space utilization in existing batteries, which affects battery energy density, this application provides a battery.

[0029] like Figures 1 to 4 As shown, the battery includes a housing 10, a battery cell 20, a discharge connector 40, a lead bus 30, and a BMS module. The housing 10 has an opening on its side wall. Multiple battery cells 20 are arranged and stacked inside the housing 10. A clearance cavity 110 communicating with the opening is formed between the multiple battery cells 20 and the housing 10. The discharge connector 40 is disposed in the opening. The first end of the lead bus 30 extends into the clearance cavity 110 and is connected to the discharge connector 40. The BMS module is disposed inside the housing 10, and the second end of the lead bus 30 is connected to the BMS module.

[0030] The battery cell 20 can be either a cylindrical battery cell 20 or a square battery cell 20. In this application, the battery cell 20 is electrically connected to the discharge connector 40 and the BMS module. The discharge connector 40 is used to output electrical energy to the outside, and the BMS module is used to monitor and control the status of the battery cell 20 and the status of the discharge connector 40.

[0031] Specifically, the battery of this application has openings on the side wall of the casing 10. The clearance cavity 110 formed by multiple cells 20 and communicating with the openings provides clearance space for the connection between the copper busbar and the discharge connector 40. Thus, the connection area between the copper busbar and the discharge structure does not need to occupy the space in the height direction of the casing 10, nor does it require lengthening the casing 10 due to the installation of the discharge connector 40. The arrangement structure of the multiple cells 20, the cooperation structure of the wire busbar 30 and the discharge connector 40 of this application are conducive to the rational use of the internal space of the casing 10, improving the utilization rate of the internal space of the casing 10 and increasing the energy density of the battery.

[0032] It is understood that the clearance cavity 110 in this application is formed by the cooperation of multiple battery cells 20. Compared with the prior art where multiple battery cells 20 are symmetrically arranged and fill the internal battery cell 20 placement space of the housing 10, this application is equivalent to leaving part of the battery cell 20 position to form the clearance cavity 110, without the need to set an additional area on the housing 10 to realize the wire bar 30 and the discharge connector 40.

[0033] In this application, the structure requires an extension of the height and length of the housing 10 when setting the discharge connector 40, resulting in a more compact battery design. This ensures the miniaturization of the battery housing 10 and allows the battery to be used in different sizes, such as small-sized installation scenarios, thereby improving the applicability of the battery pack.

[0034] In this embodiment, the length of the housing 10 is Figure 2 In the X direction shown, the width of the housing 10 is Figure 2In the Y direction shown, the height of the shell 10 is Figure 2 The Z direction is shown.

[0035] This application connects the wire bar 30 and the discharge connector 40 at the clearance cavity 110, which facilitates the setting and installation of the wire bar 30 and thus improves the battery assembly efficiency.

[0036] It should be noted that the BMS module (not shown) in this application is an existing structure.

[0037] In this embodiment, the lead busbar 30 is made of metal, such as copper. The lead busbar 30 is used to connect the discharge connector 40 and the BMS module to achieve electrical connection. The BMS module can monitor information such as the discharge voltage of the discharge connector 40.

[0038] like Figure 1 and Figure 2 As shown, along the length of the housing 10, a first placement area and a second placement area are formed inside the housing 10. The BMS module is disposed inside the first placement area, the battery cell 20 is disposed inside the second placement area, and the opening is disposed on the side wall of the second placement area.

[0039] The casing 10 has a first placement area and a second placement area inside, which separates the BMS module and the battery cell 20, ensuring that the signal transmission between the battery cell and the BMS module is not interfered with, thus enhancing the safety and performance stability of the battery. It also facilitates the individual installation and replacement of the battery cell 20 or the maintenance and disassembly of the BMS module when needed. This partitioned structure not only improves battery assembly efficiency but also facilitates the operation of the BMS module and the battery cell 20.

[0040] Specifically, the opening in this application is provided on the side wall of the second placement area to communicate with the clearance cavity 110 formed by the plurality of battery cells 20.

[0041] In this embodiment, the opening is located on the side wall of the second placement area away from the BMS module. During battery use, the discharge connector 40 is located on the side away from the BMS module, which facilitates the discharge connector 40 to output electrical energy and allows the BMS module to monitor and manage the cell 20 and the discharge connector 40. This can significantly reduce safety accidents caused by thermal runaway or electrical faults and enhance the stability and safety of the system.

[0042] In this embodiment, each clearance cavity 110 is connected to at least one opening, that is, one opening can be connected to the clearance cavity 110, or multiple openings can be connected to the clearance cavity 110.

[0043] like Figures 1 to 2As shown, multiple battery cells 20 are stacked along the length and width of the housing 10 to form a battery cell assembly, and a clearance cavity 110 is formed on the outer periphery of the battery cell assembly.

[0044] Specifically, multiple battery cells 20 are stacked to form a battery pack. The battery pack formed by the cooperation of multiple battery cells 20 forms a clearance cavity 110 at the outer periphery. In this embodiment, the battery pack may have one clearance cavity 110 or multiple clearance cavities 110.

[0045] In one specific embodiment of this example, an avoidance cavity 110 is provided, and the avoidance cavity 110 is formed in the middle region of the side wall along the width direction of the housing 10.

[0046] Specifically, the clearance cavity 110 along the width direction of the housing 10 is approximately equal to the distance between the two ends of the housing 10. The clearance cavity 110 is located in the middle region of the side wall, thereby enabling the discharge connector 40 to be located in the middle region of the side wall, which facilitates connection with an external device to be charged.

[0047] In another specific embodiment of this example, when multiple clearance cavities 110 are provided, the multiple clearance cavities 110 are spaced apart along the peripheral wall surface of the housing 10.

[0048] Specifically, multiple clearance cavities 110 are provided, and multiple clearance cavities 110 correspond to multiple openings. When the housing 10 has multiple discharge connectors 40, it can be used to connect multiple discharge connectors 40 with the wire bar 30.

[0049] In this embodiment, the avoidance cavity 110 is not limited to being located on the side away from the BMS module. Alternatively, openings can be provided on the two side walls of the housing 10 in the width direction, so that the avoidance cavity 110 can be formed on one or both sides of the battery pack in the width direction of the housing 10.

[0050] like Figure 1 and Figure 3 As shown, the battery also includes a positioning structure 50 disposed between the outer periphery of the cell assembly and the inner wall surface of the housing 10. The positioning structure 50 is disposed on the bottom surface of the housing 10, and the thickness of the positioning structure 50 is not greater than the distance between the opening and the bottom surface of the housing 10, that is, along the height direction of the housing 10, the opening is disposed above the top of the positioning structure 50.

[0051] The positioning structure 50 is an insulating buffer material used to fix the battery cell 20 inside the housing 10, and the fixing structure can be a buffer rubber pad.

[0052] Specifically, the positioning structure 50 fixes the stacked battery cell assembly, causing the battery cell assembly to tilt and sway on the wall.

[0053] In this embodiment, the opening is set on the top side of the positioning structure 50, which is beneficial to ensure that the positioning structure 50 can stably fix the battery cell group while making reasonable use of the space at the clearance cavity 110 and the waste of space inside the wall shell 10.

[0054] like Figure 1 and Figure 4 As shown, the conductor bar 30 includes an intermediate plate segment 310 disposed on the top of the battery cell 20. The conductor bar 30 also includes a first plate segment 320 and a second plate segment 330 disposed at both ends of the intermediate plate segment 310. The first plate segment 320 extends toward the bottom plate side of the housing 10 and extends into the clearance cavity 110. The second plate segment 330 extends toward the bottom plate side of the housing 10 and connects to the BMS module.

[0055] The conductor bar 30 has a relatively small thickness, so the middle section of the conductor bar 30 is set on the top side of the cell 20, which can facilitate the arrangement of the conductor bar 30 while reducing the space occupied inside the housing 10.

[0056] In this embodiment, the first plate segment 320, the middle plate segment 310 and the second plate segment 330 are arranged by sequential bending, so that the wire bar 30 is reasonably arranged inside the housing 10, which improves the utilization rate of the internal space of the housing 10.

[0057] Specifically, the intermediate plate segment 310 includes a first segment 311, a second segment 312 and a third segment 313 connected sequentially along the length direction of the housing 10. The first segment 311 is connected to the first plate segment 320, and the third segment 313 is connected to the second plate segment 330. The first segment 311 and the third segment 313 are staggered along the width direction of the housing 10.

[0058] In this embodiment, since the first plate segment 320 and the second plate segment 330 are misaligned along the width direction of the housing 10, this application adopts a method of setting the middle segment as a first segment 311, a second segment 312 and a third segment 313 that are bent in sequence, so as to enable the discharge connector 40 to be connected to the BMS module through the wire bar 30.

[0059] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0060] The battery of this application has openings on the side wall of the housing 10. A clearance cavity 110 formed by multiple battery cells 20 and communicating with the openings provides clearance space for the connection between the copper busbar and the discharge connector 40. This allows the connection area between the copper busbar and the discharge structure to not occupy space in the height direction of the housing 10, and also eliminates the need to lengthen the housing 10 due to the installation of the discharge connector 40. The arrangement structure of the multiple battery cells 20, the cooperation structure of the wire busbar 30 and the discharge connector 40 of this application are conducive to the rational use of the internal space of the housing 10, improving the utilization rate of the internal space of the housing 10 and increasing the energy density of the battery. At the same time, the structural design of this application allows the battery to be used in installation scenarios of different sizes, thereby improving the applicability of the battery pack.

[0061] This application facilitates the installation of the wire strip 30 and the discharge connector 40 by connecting the wire strip 30 at the clearance cavity 110, thereby improving the battery assembly efficiency.

[0062] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0064] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery, characterized by, The battery comprises: a shell (10) having an opening on a side wall thereof; a plurality of battery cells (20) stacked in the interior of the shell (10), and an avoiding cavity (110) formed between the plurality of battery cells (20) and the shell (10) and communicating with the opening; a discharge connector (40) arranged in the opening and a wire harness (30) having a first end extending into the avoiding cavity (110) and connected to the discharge connector (40); a BMS module arranged in the interior of the shell (10) and connected to a second end of the wire harness (30).

2. The battery of claim 1, wherein, Along the length direction of the shell (10), the interior of the shell (10) forms a first placement area and a second placement area, the BMS module is arranged in the first placement area, the battery cells (20) are arranged in the second placement area, and the opening is arranged on the side wall of the second placement area.

3. The battery of claim 2, wherein, The opening is arranged on the side wall of the second placement area away from the BMS module.

4. The battery of claim 1, wherein, Each avoiding cavity (110) communicates with at least one opening.

5. The battery of claim 1, wherein: the avoiding cavity (110) is arranged in one, and is arranged in a middle region of the side wall along the width direction of the shell (10); or when the avoiding cavity (110) is arranged in multiple, the multiple avoiding cavities (110) are arranged at intervals along the peripheral wall surface of the shell (10).

6. The battery of claim 1, wherein, The plurality of battery cells (20) are stacked to form a battery cell group along the length and width directions of the shell (10), and the avoiding cavity (110) is formed in the outer periphery of the battery cell group.

7. The battery of claim 6, wherein, The battery further comprises a positioning structure (50) arranged between the outer periphery of the battery cell group and the inner wall surface of the shell (10), the positioning structure (50) is arranged on the bottom surface of the shell (10), and the thickness of the positioning structure (50) is not greater than the distance between the opening and the bottom surface of the shell (10).

8. The battery of any one of claims 1 to 7, wherein: the wire harness (30) is made of metal.

9. The battery of any one of claims 1 to 7, wherein, The wire harness (30) comprises a middle plate segment (310) arranged on the top of the battery cell (20), and further comprises a first plate segment (320) and a second plate segment (330) arranged at two ends of the middle plate segment (310), the first plate segment (320) extends towards the bottom plate side of the shell (10) and extends into the avoiding cavity (110), and the second plate segment (330) extends towards the bottom plate side of the shell (10) and is connected to the BMS module.

10. The battery of claim 9, wherein, The intermediate plate section (310) comprises a first section (311), a second section (312) and a third section (313) connected in sequence along the length direction of the shell (10), the first section (311) is connected with the first plate section (320), the third section (313) is connected with the second plate section (330), and the first section (311) and the third section (313) are arranged in a staggered manner along the width direction of the shell (10).

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