Battery, electric device and glue filling method

Abstract

The application discloses a battery, a power utilization device and a glue filling method. The battery comprises a shell, a battery cell assembly, a first circuit board, a first structural member, a second structural member and a first adhesive substance. The battery cell assembly, the first circuit board and the first structural member are arranged along a first direction. The second structural member is bonded to the first structural member and the battery cell assembly. The second structural member, the first structural member and a battery cell body are connected to form a first area. The first circuit board is accommodated in the first area. At least part of the first adhesive substance is filled in the first area. The first adhesive substance is connected to the first circuit board, the first structural member, the second structural member and the battery cell body, thereby improving the anti-shock capability of the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery, an electrical device, and a potting method. Background Technology

[0002] Currently, batteries containing multiple cells have a high degree of internal integration. In order to improve the stability of the internal structure and reduce weight, many manufacturers choose to fill them with expanding foam. However, due to the expanding foam's characteristics of expanding and curing while flowing, it may cause the internal structure of the battery to be squeezed, resulting in overflow or incomplete filling, which affects the stability and shock resistance of the battery's internal structure. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide a battery that improves shock resistance and enhances the stability of the battery's internal structure.

[0004] Embodiments of this application provide a battery, including a casing, a cell assembly, a first circuit board, a first structural member, a second structural member, and a first adhesive substance. The cell assembly, the first circuit board, the first structural member, and the second structural member are disposed within the casing. The cell assembly includes a cell unit, which includes a cell body and electrode terminals, with the electrode terminals extending from the cell body. The cell assembly and the first circuit board are arranged along a first direction. The electrode terminals are connected to the first circuit board, which has a first surface and a second surface facing opposite directions, with the first surface facing the cell body. The cell assembly, the first circuit board, and the first structural member are arranged along the first direction. At least a portion of the first structural member is disposed on the side of the first circuit board away from the cell body and facing the second surface, and the first structural member is connected to the first circuit board. The second structural member adhesively bonds the first structural member and the cell assembly. The second structural member, the first structural member, and the cell body are connected to form a first region, with the portion of the electrode terminals extending from the cell body and the first circuit board housed in the first region. At least a portion of the first adhesive substance fills the first region, and the first adhesive substance connects the first circuit board, the first structural member, the second structural member, and the cell body.

[0005] In the aforementioned battery, a first structural component and a cell assembly are bonded together by a second structural component to form a first region. When the first adhesive material is poured into the first region, the second structural component helps reduce the overflow of the first adhesive material and improves the stability of the relative position of the first circuit board and the cell assembly. By flipping the battery to its side, the first adhesive material is facilitated to flow and fill within the first region, improving the filling effect of the first adhesive material in the first region, enhancing the stability of the connection between the first adhesive material and the first circuit board, the first structural component, the second structural component, and the cell body, improving the battery's shock resistance, and also helping to reduce the impact of the overflow of the first adhesive material on the internal space of the battery.

[0006] In some embodiments of this application, the first adhesive material has pores, and the porosity of the first adhesive material is greater than or equal to 30% and less than or equal to 70%. This is beneficial for balancing the filling effect of the first adhesive material in the first region and reducing the impact of the self-weight of the first adhesive material on the weight of the battery. It is also beneficial for balancing the structural strength of the first adhesive material, improving the stability of the connection between the first adhesive material and the first circuit board, the first structural component, the second structural component and the battery cell body, and improving the shock resistance of the battery.

[0007] In some embodiments of this application, the density of the first adhesive material is greater than or equal to 0.15 g / cm^3 and less than or equal to 0.25 g / cm^3, which is beneficial to reduce the weight of the first adhesive material while ensuring its flowability, thereby reducing the impact of the weight of the first adhesive material on the battery.

[0008] In some embodiments of this application, the Shore hardness of the first adhesive material is greater than 30HA and less than 70HA, which is beneficial to the flow of the first adhesive material and further improves the filling effect of the first adhesive material in the first area.

[0009] In some embodiments of this application, the battery cell assembly has a first end face and a second end face, which are respectively located at both ends of the battery cell assembly along a second direction. A second structural member is bonded to the first end face and the second end face, and the second direction is perpendicular to the first direction. The battery cell assembly also has a first side face and a second side face, which are respectively located at both ends of the battery cell assembly along a third direction. Both the first side face and the second side face are connected to the first end face and the second end face. The second structural member is bonded to the first side face, and the third direction is perpendicular to the first direction and the second direction.

[0010] The aforementioned second structural component adheres to the first end face, the second end face, and the first side face of the battery cell assembly, forming a semi-enclosed area surrounded on three sides in the first region. When the first adhesive material is injected, it helps to reduce the outflow of the first adhesive material from the first region, facilitates the flow and filling of the first adhesive material within the first region, improves the filling effect of the first adhesive material, enhances the stability of the connection between the first adhesive material and the first circuit board, the first structural component, the second structural component, and the battery cell body, improves the shock resistance of the battery, and also helps to reduce the impact of the overflow of the first adhesive material on the internal space of the battery.

[0011] In some embodiments of this application, the first structural member includes a bottom wall, a first wall, a second wall, and a third wall. The first wall is connected to the bottom wall and extends in the opposite direction to a first direction. The second wall is connected to the bottom wall and extends in the opposite direction to the first direction. The first wall and the second wall are arranged in a second direction. The third wall is connected to the bottom wall and extends in the opposite direction to the first direction. The third wall connects to the first wall and the second wall. A portion of the second structural member is bonded to the first wall and a first end face; a portion of the second structural member is bonded to the second wall and a second end face; and a portion of the second structural member is bonded to the third wall and a first side face. The bottom wall, the first wall, the second wall, the third wall, the second structural member, and the battery cell body form a first region.

[0012] The second structural component is partially bonded to the first wall and the first end face, partially bonded to the second wall and the second end face, and partially bonded to the third wall and the first side face, so that the first region forms a semi-enclosed region surrounded on three sides. When the first adhesive material is poured in, it helps to reduce the flow of the first adhesive material out of the first region, facilitates the flow and filling of the first adhesive material in the first region, improves the filling effect of the first adhesive material in the first region, improves the stability of the first adhesive material connecting the first circuit board, the first structural component, the second structural component and the cell body, improves the shock resistance of the battery, and also helps to reduce the impact of the overflow of the first adhesive material on the internal space of the battery.

[0013] In some embodiments of this application, when viewed along the second direction, the first wall overlaps with the first end face, and the second wall overlaps with the second end face. This improves the adhesion between the second structural component and the first wall and the first end face, enhances the adhesion between the second structural component and the second wall and the second end face, improves the connection stability between the second structural component and the first structural component and the cell body, and reduces the risk of leakage of the first adhesive material. When viewed along the third direction, the third wall overlaps with the first side surface. This improves the adhesion between the second structural component and the third wall and the first side surface, enhances the connection stability between the second structural component and the first structural component and the cell body, reduces the risk of leakage of the first adhesive material, and reduces the impact of the first adhesive material overflow on the internal space of the battery.

[0014] In some embodiments of this application, the first wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member is bonded to at least a portion of the first wall that extends beyond the first circuit board. This is beneficial to improving the connection stability between the second structural member and the first wall and the cell body, reducing the risk of leakage of the first adhesive material, and reducing the impact of the overflow of the first adhesive material on the internal space of the battery.

[0015] In some embodiments of this application, the second wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member is bonded to at least a portion of the second wall that extends beyond the first circuit board. This is beneficial to improving the connection stability between the second structural member and the second wall and the cell body, reducing the risk of leakage of the first adhesive material, and reducing the impact of the overflow of the first adhesive material on the internal space of the battery.

[0016] In some embodiments of this application, the third wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member is bonded to at least a portion of the third wall that extends beyond the first circuit board. This is beneficial to improving the connection stability between the second structural member bonded to the third wall and the cell body, reducing the risk of leakage of the first adhesive material, and reducing the impact of the overflow of the first adhesive material on the internal space of the battery.

[0017] In some embodiments of this application, the first wall includes a first connector connected to the first circuit board, which helps to improve the stability of the first structural member connected to the first circuit board and improve the shock resistance of the battery.

[0018] In some embodiments of this application, the second wall includes a second connector connected to the first circuit board, which helps to improve the stability of the first structural member connected to the first circuit board and improve the shock resistance of the battery.

[0019] In some embodiments of this application, the first structural member further includes a fourth wall, which is connected to the bottom wall and extends in the opposite direction to the first direction; the fourth wall and the third wall are arranged in a tandem along the third direction.

[0020] In some embodiments of this application, the length of the fourth wall is less than the lengths of the first wall, the second wall, and the third wall in the opposite direction to the first direction, which is beneficial for forming an opening in the first region and facilitating the injection of the first adhesive material into the first region.

[0021] In some embodiments of this application, when viewed in a first direction, at least one of the first wall and the second wall is separate from the fourth wall. The region of either the first wall or the second wall that is separate from the fourth wall can form an opening in the first region, facilitating the injection of a first adhesive substance into the first region.

[0022] In some embodiments of this application, the fourth wall extends beyond the first circuit board in the opposite direction to the first direction, which is beneficial to improving the connection stability between the first structural member and the first circuit board and improving the shock resistance of the battery.

[0023] In some embodiments of this application, the battery further includes a third structural member, which is bonded to the fourth wall and the second side, which helps to further seal the first region, reduce the risk of leakage of the first adhesive material from the first region, and improve the filling effect of the first adhesive material in the first region.

[0024] In some embodiments of this application, the second structural member includes a first end and a second end, the first end being connected to a first wall and the second end being connected to a second wall.

[0025] In some embodiments of this application, along the third direction, the length of the first wall is a first length, and the length of the portion of the first wall bonded to the second structural member is a second length. The ratio of the second length to the first length is greater than or equal to 0.9 and less than or equal to 1, which is beneficial to ensure the effect of the second structural member bonding to the first wall, while also taking into account the impact on the opening and reducing the risk of the second structural member blocking the opening.

[0026] In some embodiments of this application, along the third direction, the length of the second wall is the third length, and the length of the portion of the second wall bonded by the second structural member is the fourth length. The ratio of the fourth length to the third length is greater than or equal to 0.9 and less than or equal to 1, which is beneficial to ensure the effect of the second structural member bonding the second wall, while also taking into account the impact on the opening and reducing the risk of the second structural member blocking the opening.

[0027] In some embodiments of this application, the first structural member includes a bottom wall, a first through hole and a second through hole penetrating the bottom wall, and the bottom wall is located on the side of the first circuit board away from the cell body along a first direction. The battery also includes a second circuit board, a first connecting terminal and a second connecting terminal, which are disposed within a housing. Along the first direction, the second circuit board is located on the side of the bottom wall away from the first circuit board. The first connecting terminal connects the cell assembly and the second circuit board, a portion of which is accommodated in a first region and a first through hole, and a portion of which extends out of the bottom wall on the side away from the first circuit board. The second connecting terminal connects the cell assembly and the second circuit board, a portion of which is accommodated in the first region and a second through hole, and a portion of which extends out of the bottom wall on the side away from the first circuit board.

[0028] The first connection terminal is connected to the cell assembly and the second circuit board through the first through hole, and the second connection terminal is connected to the cell assembly and the second circuit board through the second through hole, so that the second circuit board can connect to and control the cell assembly. This helps to reduce the impact of the first and second connection terminals on the internal space of the battery and improve the space utilization and energy density of the battery.

[0029] In some embodiments of this application, the battery further includes a second adhesive material that fills the gap between the first connecting terminal and the first through hole. This helps to improve the connection stability between the first connecting terminal and the first structural component, improve the shock resistance of the battery, and the second adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material from the first through hole and improving the filling effect of the first adhesive material.

[0030] In some embodiments of this application, the battery further includes a third adhesive material, which fills the gap between the second connecting terminal and the second through hole. This helps to improve the connection stability between the second connecting terminal and the first structural component, improve the shock resistance of the battery, and the third adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material from the second through hole and improving the filling effect of the first adhesive material.

[0031] In some embodiments of this application, the first structural member further includes a third through hole penetrating the bottom wall; the battery further includes a wiring harness connecting the cell assembly and the second circuit board, a portion of the wiring harness being accommodated in the first region and the third through hole, and a portion of the wiring harness extending out of the bottom wall on the side opposite to the first circuit board.

[0032] The aforementioned wiring harness connects the battery cell assembly and the second circuit board through the third through hole, enabling the second circuit board to connect to and collect information from each battery cell unit in the battery cell assembly. It also helps to reduce the impact of the wiring harness on the internal space of the battery, thereby improving the space utilization and energy density of the battery.

[0033] In some embodiments of this application, the battery further includes a fourth adhesive material, which fills the gap between the wire harness and the third through hole. This helps to improve the connection stability between the wire harness and the first structural component, improve the shock resistance of the battery, and the fourth adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material from the third through hole and improving the filling effect of the first adhesive material.

[0034] In some embodiments of this application, the battery further includes a fifth adhesive material, a portion of which is filled between different cell bodies and a portion of which is filled between the cell body and the casing, which is beneficial to improving the battery's shock resistance and reducing the battery's weight.

[0035] Embodiments of this application also provide an electrical device including the battery described in any of the foregoing embodiments.

[0036] In the aforementioned electrical equipment, the battery is bonded to the first structural component and the cell assembly via the second structural component to form a first region. Multiple sides of the first region are sealed. When the first adhesive material is poured into the first region, flipping the battery to its side facilitates the flow and filling of the first adhesive material in the first region, improves the filling effect of the first adhesive material in the first region, enhances the stability of the first adhesive material connecting the first circuit board, the first structural component, the second structural component and the cell body, improves the battery's shock resistance, and reduces the impact of battery shaking on the electrical equipment.

[0037] The embodiments of this application also provide a potting method, applied to the battery described in any of the foregoing embodiments. The potting method includes the following steps: S1: Before installing the cell assembly into the housing, the electrode terminals of the cell assembly are connected to a first circuit board, a first structural component is connected to the first circuit board, and a second structural component is bonded to the first structural component and the cell body, so that the cell body, the first circuit board, and the first structural component are arranged along a first direction, and the second structural component, the first structural component, and the cell body are connected to form a first region, the first region having an opening; S2: The assembly after the cell assembly, the first circuit board, the first structural component, and the second structural component are connected is placed on its side with the opening facing upward, and the cell assembly, the first circuit board, and the first structural component are arranged along a horizontal direction; S3: A first adhesive material is poured into the first region.

[0038] Using the above-described potting method, the first adhesive material is poured into the first region through the upward-facing opening. Under its own weight, the first adhesive material flows within the first region, which helps to improve the filling effect of the first adhesive material within the first region. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application.

[0040] Figure 2 This is an exploded view of a battery in one embodiment of this application.

[0041] Figure 3 This is a schematic diagram of the structure in one embodiment of the present application, showing the connection between the battery cell assembly, the first circuit board, the first structural component, and the second structural component.

[0042] Figure 4 yes Figure 3 A view of section IV-IV in the structure shown.

[0043] Figure 5 This is an exploded view of a battery in one embodiment of this application.

[0044] Figure 6 This is a schematic diagram of a battery cell unit in one embodiment of this application, showing that the first electrode terminal and the second electrode terminal are located on the same side.

[0045] Figure 7 This is a schematic diagram of the structure in one embodiment of the present application, in which the first electrode terminal and the second electrode terminal are located on both sides of the battery cell.

[0046] Figure 8 This is a view of a portion of the battery structure along a first direction in one embodiment of this application.

[0047] Figure 9 yes Figure 3 Another view of the structure shown.

[0048] Figure 10 This is a schematic diagram of the structure of the first structural member in one embodiment of this application.

[0049] Figure 11 yes Figure 4 A magnified view of region IX in the structure shown.

[0050] Figure 12 yes Figure 4 A magnified view of region X in the structure shown.

[0051] Figure 13 yes Figure 9 A view of section XI-XI in the structure shown.

[0052] Figure 14 This is a view of a portion of the battery structure along a first direction in one embodiment of this application.

[0053] Figure 15 This is a view of a portion of the battery structure along a first direction in one embodiment of this application.

[0054] Figure 16 This is a schematic diagram of the connection between the battery cell assembly, the first circuit board, the first structural component, the second structural component, and the third structural component in one embodiment of this application.

[0055] Figure 17 This is a schematic diagram of the structure of the first structural member in one embodiment of this application.

[0056] Figure 18 This is a schematic diagram of the structure of an electrical device in one embodiment of this application.

[0057] Figure 19 This is a flowchart of a glue-pouring method in one embodiment of this application. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0059] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an element positioned in between. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be an element positioned in between. In this application, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings, are intended to cover non-exclusive inclusion.

[0061] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. In the description of the embodiments of this application, technical terms such as "upper," "lower," "top," and "bottom" are used only to distinguish different objects and should not be construed as indicating a specific positional relationship.

[0062] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] Embodiments of this application provide a battery, including a casing, a cell assembly, a first circuit board, a first structural member, a second structural member, and a first adhesive substance. The cell assembly, the first circuit board, the first structural member, and the second structural member are disposed within the casing. The cell assembly includes a cell unit, which includes a cell body and electrode terminals, with the electrode terminals extending from the cell body. The cell assembly and the first circuit board are arranged along a first direction. The electrode terminals are connected to the first circuit board, which has a first surface and a second surface facing opposite directions, with the first surface facing the cell body. The cell assembly, the first circuit board, and the first structural member are arranged along the first direction. At least a portion of the first structural member is disposed on the side of the first circuit board away from the cell body and facing the second surface, and the first structural member is connected to the first circuit board. The second structural member adhesively bonds the first structural member and the cell assembly. The second structural member, the first structural member, and the cell body are connected to form a first region, with the portion of the electrode terminals extending from the cell body and the first circuit board housed in the first region. At least a portion of the first adhesive substance fills the first region, and the first adhesive substance connects the first circuit board, the first structural member, the second structural member, and the cell body.

[0064] In the aforementioned battery, a first structural component and a cell assembly are bonded together by a second structural component to form a first region. When the first adhesive material is poured into the first region, the second structural component helps reduce the overflow of the first adhesive material and improves the stability of the relative position of the first circuit board and the cell assembly. By flipping the battery to its side, the first adhesive material is facilitated to flow and fill within the first region, improving the filling effect of the first adhesive material within the first region, enhancing the stability of the connection between the first adhesive material and the first circuit board, the first structural component, the second structural component, and the cell body, improving the battery's shock resistance, and also helping to reduce the overflow of the first adhesive material and reduce the impact of the overflow of the first adhesive material on the internal space of the battery.

[0065] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0066] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of this application provides a battery 100, including a housing 10, a cell assembly 20, a first circuit board 31, a first structural member 41, a second structural member 42, and a first adhesive material 51. The cell assembly 20, the first circuit board 31, the first structural member 41, and the second structural member 42 are disposed within the housing 10, and the cell assembly 20, the first circuit board 31, and the first structural member 41 are arranged along a first direction Z. The first direction Z is the direction from the cell assembly 20 to the first circuit board 31.

[0067] The battery cell assembly 20 includes a battery cell unit 21, which includes a battery cell body 211 and an electrode terminal 212. The electrode terminal 212 is disposed on the battery cell body 211 and extends out of the battery cell body 211.

[0068] The cell assembly 20 and the first circuit board 31 are arranged along the first direction Z. The electrode terminal 212 is connected to the first circuit board 31. The first circuit board 31 has a first surface 311 and a second surface 312 facing opposite directions. The first surface 311 faces the cell body 211.

[0069] At least a portion of the first structural member 41 is disposed on the side of the first circuit board 31 away from the cell body 211 and faces the second surface 312. The first structural member 41 is connected to the first circuit board 31.

[0070] The second structural component 42 is bonded to the first structural component 41 and the cell assembly 20. The second structural component 42, the first structural component 41 and the cell body 211 are connected to form a first region 60. The portion of the electrode terminal 212 extending out of the cell body 211 and the first circuit board 31 are housed in the first region 60.

[0071] At least a portion of the first adhesive material 51 is filled in the first region 60, and the first adhesive material 51 connects the first circuit board 31, the first structural member 41, the second structural member 42 and the battery cell body 211.

[0072] In the aforementioned battery 100, the first structural member 41 and the cell assembly 20 are bonded together by the second structural member 42 to form a first region 60, and multiple sides of the first region 60 are sealed. When the first adhesive material 51 is injected into the first region 60, flipping the battery 100 to place it on its side facilitates the flow and filling of the first adhesive material 51 in the first region 60, improves the filling effect of the first adhesive material 51 in the first region 60, improves the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural member 41, the second structural member 42 and the cell body 211, improves the shock resistance of the battery 100, and also helps to reduce the overflow of the first adhesive material 51 and reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0073] In one embodiment, the first adhesive material 51 has pores 511 (e.g., Figure 11 and Figure 12As shown, the porosity of the first adhesive material 51 is greater than or equal to 30% and less than or equal to 70%. By controlling the porosity of the first adhesive material 51, it is beneficial to balance improving the filling effect of the first adhesive material 51 in the first region 60 and reducing the impact of the self-weight of the first adhesive material 51 on the weight of the battery 100. It is also beneficial to balance the structural strength of the first adhesive material 51, ensuring the stability of the connection between the first adhesive material 51 and the first circuit board 31, the first structural component 41, the second structural component 42 and the cell body 211, and improving the shock resistance of the battery 100.

[0074] In one embodiment, if the porosity of the first adhesive material 51 is less than 30%, its foaming is insufficient, resulting in poor filling effect and a large weight of the first adhesive material 51 in the first region 60. At least part of the first adhesive material 51 is concentrated on one side of the cell assembly 20 along the first direction Z. The excessive weight of the first adhesive material 51 may damage the cell assembly 20 under extreme conditions.

[0075] In one embodiment, if the porosity of the first adhesive material 51 is greater than 70%, its excessive foaming will affect the structural strength of the first adhesive material 51, and the first adhesive material 51 will be at risk of deformation under pressure or impact, affecting the shock resistance of the battery 100.

[0076] In this application, the porosity of the first adhesive material 51 refers to the ratio of the sum of the volumes of all pores per unit volume of the first adhesive material 51 to the unit volume. Porosity reflects the density of the first adhesive material 51; a higher porosity indicates a lower density of the first adhesive material 51, and a lower porosity indicates a higher density of the first adhesive material 51.

[0077] In one embodiment, the porosity of the first adhesive material 51 is calculated as follows: 10 samples are obtained from any region on the same first adhesive material 51. The volume of the solid part and the volume of the outer contour of each sample are calculated by the water displacement method and the wax sealing method. The difference between the outer contour volume and the solid part volume of each sample is the volume of all pores in each sample. The porosity of each sample is calculated, and the average porosity of the 10 samples is taken as the porosity of the first adhesive material 51.

[0078] In one embodiment, the porosity of the first adhesive material 51 is greater than or equal to 40% and less than or equal to 60%, which is beneficial to further balance the filling effect of the first adhesive material 51 in the first region 60 and the influence of the weight of the first adhesive material 51 on the weight of the battery 100. It is also beneficial to balance the structural strength of the first adhesive material 51, ensure the stability of the connection between the first adhesive material 51 and the first circuit board 31, the first structural component 41, the second structural component 42 and the cell body 211, and improve the shock resistance of the battery 100.

[0079] In one embodiment, the porosity of the first adhesive material 51 is any one of 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, and 70%.

[0080] In one embodiment, the density of the first adhesive material 51 is greater than or equal to 0.15 g / cm^3 and less than or equal to 0.25 g / cm^3, which is beneficial to reduce the weight of the first adhesive material 51 while ensuring its flowability, thereby reducing the impact of the weight of the first adhesive material 51 on the battery 100.

[0081] In one embodiment, the density of the first adhesive material 51 is greater than or equal to 0.18 g / cm^3 and less than or equal to 0.22 g / cm^3, which is beneficial to further balance the flowability and weight of the first adhesive material 51, reduce the weight of the first adhesive material 51 while ensuring its flowability, and reduce the impact of the weight of the first adhesive material 51 on the battery 100.

[0082] In one embodiment, the density of the first adhesive material 51 is any one of 0.15 g / cm^3, 0.16 g / cm^3, 0.17 g / cm^3, 0.18 g / cm^3, 0.19 g / cm^3, 0.20 g / cm^3, 0.21 g / cm^3, 0.22 g / cm^3, 0.23 g / cm^3, 0.24 g / cm^3, and 0.25 g / cm^3.

[0083] In one embodiment, the Shore hardness of the first adhesive material 51 is greater than 30HA and less than 70HA, which is beneficial to balance the flowability and structural strength of the first adhesive material 51, further improve the filling effect of the first adhesive material 51 in the first region 60, ensure the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural component 41, the second structural component 42 and the cell body 211, and improve the shock resistance of the battery 100.

[0084] In one embodiment, the Shore hardness of the first adhesive material 51 is greater than 45HA and less than 60HA, which is beneficial to further balance the flowability and structural strength of the first adhesive material 51.

[0085] In one embodiment, the first adhesive material 51 is formed by curing a foam. In another embodiment, the first adhesive material 51 is formed by curing a polyurethane foam.

[0086] In one embodiment, the second structural component 42 is an adhesive tape. In another embodiment, the second structural component 42 is an adhesive tape formed by combining BOPP film, PE film, or PVC film with acrylic pressure-sensitive adhesive.

[0087] like Figure 1, Figure 2 and Figure 5 As shown, in one embodiment, the housing 10 includes an upper wall 11, a lower wall 12, and a peripheral wall 13. The upper wall 11 and the lower wall 12 are arranged along a first direction Z. The peripheral wall 13 connects the upper wall 11 and the lower wall 12. The peripheral wall 13, the upper wall 11, and the lower wall 12 are connected to form a receiving space 14 capable of accommodating the battery cell assembly 20, the first circuit board 31, the first structural member 41, and the second structural member 42. In one embodiment, the lower wall 12, the battery cell assembly 20, the first circuit board 31, the first structural member 41, and the upper wall 11 are arranged along the first direction Z.

[0088] In one embodiment, the peripheral wall 13 is fastened to the upper wall 11 and the lower wall 12 by bolts. In other embodiments, the peripheral wall 13 is bonded to the upper wall 11 and the lower wall 12 by structural adhesive.

[0089] In one embodiment, the peripheral wall 13 includes a first housing 131 and a second housing 132 connected to each other. Both the first housing 131 and the second housing 132 are connected to the upper wall 11 and the lower wall 12. The first housing 131, the second housing 132, the upper wall 11, and the lower wall 12 are connected to form a receiving space 14. In one embodiment, the first housing 131 and the second housing 132 are connected by welding or structural adhesive.

[0090] like Figure 6 As shown, in one embodiment, the cell unit 21 is a pouch cell. In other embodiments, the cell unit 21 may also be a rigid-cased cell (not shown).

[0091] As an example, the following description will further illustrate the concept using cell unit 21 as a pouch cell.

[0092] The battery cell body 211 includes a battery cell housing 2111 and an electrode assembly (not shown). The electrode assembly is disposed inside the battery cell housing 2111. A portion of the electrode terminal 212 is located inside the battery cell housing 2111 and connected to the electrode assembly, while a portion of the electrode terminal 212 extends out of the battery cell housing 2111. The electrode terminal 212 includes a first electrode terminal 2121 and a second electrode terminal 2122, both of which are connected to the electrode assembly and extend out of the battery cell housing 2111.

[0093] One of the first electrode terminal 2121 and the second electrode terminal 2122 is a positive electrode terminal 212, and the other of the first electrode terminal 2121 and the second electrode terminal 2122 is a negative electrode terminal 212. Optionally, the first electrode terminal 2121 is a positive electrode terminal 212, and the second electrode terminal 2122 is a negative electrode terminal 212.

[0094] The electrode assembly includes a positive electrode, a negative electrode, and a separator (not shown). The separator is disposed between the positive electrode and the negative electrode. The positive electrode, the separator, and the negative electrode are wound or stacked to form the electrode assembly. The first electrode terminal 2121 is connected to the positive electrode and the second electrode terminal 2122 is connected to the negative electrode.

[0095] In one embodiment, the first electrode terminal 2121 and the second electrode terminal 2122 are located on the same side of the cell body 211 along the first direction Z.

[0096] like Figure 7 As shown, in one embodiment, the first electrode terminal 2121 and the second electrode terminal 2122 are located at both ends of the cell body 211 along the first direction Z, respectively.

[0097] As an example, the following description takes the case where the first electrode terminal 2121 and the second electrode terminal 2122 are located on the same side of the cell body 211.

[0098] like Figure 2 As shown, in one embodiment, the battery cell assembly 20 includes a plurality of battery cell units 21, all of which are stacked along a second direction Y, which is perpendicular to the first direction Z. In one embodiment, at least some of the battery cell units 21 have the same structure, meaning they use the same chemical system, the same cell structure, and the same positional relationship between the electrode terminals and the cell body. Figure 6 As shown. In one embodiment, all the battery cell units 21 have the same structure, and as shown... Figure 6 As shown.

[0099] As an example, the following describes the structure of all cell units 21 as follows: Figure 6 The following example will be used for further explanation.

[0100] In one embodiment, the electrode terminals 212 of all cell units 21 are located on the side of the cell assembly 20 along the first direction Z close to the first circuit board 31, and all electrode terminals 212 are connected to the first circuit board 31. In another embodiment, all electrode terminals 212 pass through the first circuit board 31 and extend out of the first circuit board 31 along the first direction Z, with different electrode terminals 212 connected on the side of the first circuit board 31 opposite to the cell body 211, so that all cell units 21 are interconnected. Optionally, all cell units 21 are connected in series. Optionally, all cell units 21 are connected in parallel. Optionally, all cell units 21 are connected by a combination of series and parallel connections.

[0101] In one embodiment, the first circuit board 31 is provided with a plurality of through fourth through holes 313, all of which penetrate the first surface 311 and the second surface 312, and different electrode terminals 212 pass through the first circuit board 31 through different fourth through holes 313.

[0102] like Figure 4 and Figure 8 As shown, in one embodiment, along the first direction Z, a portion of the first adhesive material 51 is located on one side of the first circuit board 31, and a portion of the first adhesive material 51 is located on the other side of the first circuit board 31, which helps to improve the stability of the connection between the first circuit board 31 and the first structural member 41 and the cell assembly 20. In one embodiment, a portion of the first adhesive material 51 covers the exposed portion of the electrode terminal 212, which helps to reduce the risk of bending or breaking of the electrode terminal 212, and also reduces the risk of short circuit of the electrode terminal 212.

[0103] In one embodiment, a portion of the first adhesive material 51 is located in the gap within the fourth through hole 313. In one embodiment, when the first adhesive material 51 is injected into the first region 60, the first adhesive material 51 flows through the fourth through hole 313 on one side of the first surface 311 and the second surface 312 of the first circuit board 31, which is beneficial to improving the flow and filling effect of the first adhesive material 51. After the first adhesive material 51 is filled, it is beneficial to improve the connection strength between the electrode terminal 212 and the first circuit board 31, and improve the shock resistance of the battery 100.

[0104] like Figure 3 , Figure 4 and Figure 9 As shown, in one embodiment, the cell assembly 20 has a first end face 22 and a second end face 23, the first end face 22 and the second end face 23 are respectively located at both ends of the cell assembly 20 along the second direction Y, and the second structural member 42 is bonded to the first end face 22 and the second end face 23.

[0105] The cell assembly 20 also has a first side 24 and a second side 25, which are located at the two ends of the cell assembly 20 along the third direction X. The first side 24 and the second side 25 are both connected to the first end face 22 and the second end face 23. The second structural member 42 is bonded to the first side 24. The third direction X is perpendicular to the first direction Z and the second direction Y.

[0106] The aforementioned second structural component 42 bonds the first end face 22, the second end face 23, and the first side face 24 of the cell assembly 20, making the first region 60 a semi-enclosed region surrounded on three sides. When the first adhesive material 51 is injected, it helps to reduce the outflow of the first adhesive material 51 from the first region 60, facilitates the flow and filling of the first adhesive material 51 within the first region 60, improves the filling effect of the first adhesive material 51, enhances the stability of the connection between the first adhesive material 51 and the first circuit board 31, the first structural component 41, the second structural component 42, and the cell body 211, improves the shock resistance of the battery 100, and also helps to reduce the overflow of the first adhesive material 51, reducing the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0107] In one embodiment, along the first direction Z, there is an opening 61 between the bottom wall 411 and the second side surface 25, and the opening 61 communicates with the first region 60.

[0108] When injecting the first adhesive material 51, the cell assembly 20, the first circuit board 31, the first structural component 41 and the second structural component 42 are connected and placed on their sides, with the first side 24 facing down and the second side 25 facing up. The first adhesive material 51 is injected into the first region 60 through the opening 61. The first adhesive material 51 can flow and fill in the first region 60 under the action of gravity, which helps to improve the filling effect of the first adhesive material 51 in the first region 60, improve the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural component 41, the second structural component 42 and the cell body 211, and improve the shock resistance of the battery 100.

[0109] Furthermore, the second structural component 42, the first wall 412, the second wall 413, and the third wall 414 can act as a sealant, reducing the risk of leakage of the first adhesive material 51 from the first region 60. During the process of the first adhesive material 51 flowing and filling in the first region 60, under the sealing effect of the second structural component 42, the first wall 412, the second wall 413, and the third wall 414, it can flow and fill the gaps in the first region 60, improving its filling effect. It also helps to reduce the overflow of the first adhesive material 51 and reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0110] In one embodiment, a portion of the first adhesive material 51 overflows from the opening 61, and a portion of the first adhesive material 51 is located outside the first region 60.

[0111] In one embodiment, along the second direction Y, the side surface of the cell unit 21 located at one edge constitutes the first end face 22 of the cell assembly 20, and the side surface of the cell unit 21 located at the other edge constitutes the second end face 23 of the cell assembly 20. In another embodiment, along the third direction X, one side surface of all the cell units 21 constitutes the first side surface 24 of the cell assembly 20, and the other side surface of all the cell units 21 constitutes the second side surface 25 of the cell assembly 20.

[0112] like Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, in one embodiment, the first structural member 41 includes a bottom wall 411, a first wall 412, a second wall 413, and a third wall 414. The first wall 412, the second wall 413, and the third wall 414 are all connected to the bottom wall 411 and extend in the opposite direction to the first direction Z. The third wall 414 connects the first wall 412 and the second wall 413. The first wall 412 and the second wall 413 are arranged in the second direction Y.

[0113] The second structural member 42 is partially bonded to the first wall 412 and the first end face 22, partially bonded to the second wall 413 and the second end face 23, and partially bonded to the third wall 414 and the first side face 24. The bottom wall 411, the first wall 412, the second wall 413, the third wall 414, the second structural member 42, and the multiple battery cell bodies 211 form the first region 60.

[0114] The second structural member 42 is partially bonded to the first wall 412 and the first end face 22, partially bonded to the second wall 413 and the second end face 23, and partially bonded to the third wall 414 and the first side face 24, so that the first region 60 forms a semi-enclosed region surrounded on three sides. When the first adhesive material 51 is poured in, it helps to reduce the flow of the first adhesive material 51 out of the first region 60, facilitates the flow and filling of the first adhesive material 51 in the first region 60, improves the filling effect of the first adhesive material 51 in the first region 60, improves the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural member 41, the second structural member 42 and the cell body 211, improves the shock resistance of the battery 100, and also helps to reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0115] like Figure 3 and Figure 11As shown, in one embodiment, when viewed along the second direction Y, the first wall 412 overlaps with the first end face 22, which is beneficial to improve the bonding effect of the second structural member 42 to the first wall 412 and the first end face 22, improve the connection stability of the second structural member 42 to the first structural member 41 and the cell body 211, and also helps to reduce the risk of leakage of the first adhesive material 51 and reduce the impact of the first adhesive material 51 overflowing on the internal space of the battery 100.

[0116] In one embodiment, the first wall 412 extends beyond the first circuit board 31 in the opposite direction of the first direction Z. The second structural member 42 is bonded to at least a portion of the first wall 412 that extends beyond the first circuit board 31. This is beneficial to improving the connection stability between the second structural member 42 and the first wall 412 and the cell body 211. It is also beneficial to reduce the risk of leakage of the first adhesive material 51, improve the shock resistance of the battery, and reduce the impact of the first adhesive material 51 overflowing on the internal space of the battery 100.

[0117] In one embodiment, the first wall 412 includes a first connector 4121, which is connected to the first circuit board 31. This improves the stability of the connection between the first structural member 41 and the first circuit board 31 and enhances the shock resistance of the battery 100.

[0118] In one embodiment, the first connector 4121 is disposed on the inner surface of the first wall 412 and extends toward the second wall 413. The first circuit board 31 is located between the first connector 4121 and the bottom wall 411 along the first direction Z. The first connector 4121 can restrict the movement of the first circuit board 31 in the opposite direction of the first direction Z, thereby improving the shock resistance of the battery 100.

[0119] In one embodiment, the first connector 4121 is provided with a first inclined surface 41211, which is inclined in the first direction Z. Along the opposite direction of the first direction Z, the distance between the first inclined surface 41211 and the first wall 412 gradually decreases in the second direction Y. When the first structural member 41 and the first circuit board 31 are assembled close to each other along the first direction Z, the first inclined surface 41211 can play a guiding role, guiding the first circuit board 31 to move relative to the first structural member 41 until the first circuit board 31 moves between the first connector 4121 and the bottom wall 411.

[0120] In one embodiment, along the third direction X, the length of the first wall 412 is a first length, and the length of the portion of the first wall 412 that is bonded to the second structural member 42 is a second length. The ratio of the second length to the first length is greater than or equal to 0.9 and less than or equal to 1, which is beneficial to ensuring the effect of the second structural member 42 bonding to the first wall 412, and also takes into account the impact on the opening 61, reducing the risk that the second structural member 42 will block the opening 61.

[0121] Optionally, the ratio of the second length to the first length can be any one of 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, and 1.

[0122] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the first wall 412 is not less than 5mm, which helps to improve the stability of the bonding between the second structural member 42 and the first wall 412, reduces the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, and reduces the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0123] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the first end face 22 is not less than 5mm, which helps to improve the stability of the bonding between the second structural member 42 and the first end face 22, reduces the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, and reduces the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0124] like Figure 9 , Figure 10 and Figure 12 As shown, in one embodiment, when viewed along the second direction Y, the second wall 413 overlaps with the second end face 23, which is beneficial to improving the bonding effect of the second structural member 42 to the second wall 413 and the second end face 23, improving the connection stability of the second structural member 42 to the first structural member 41 and the cell body 211, and also helps to reduce the risk of leakage of the first adhesive material 51 and reduce the impact of the first adhesive material 51 overflowing on the internal space of the battery 100.

[0125] In one embodiment, the second wall 413 extends beyond the first circuit board 31 in the opposite direction of the first direction Z. The second structural member 42 adheres to at least a portion of the second wall 413 that extends beyond the first circuit board 31. This is beneficial to improving the connection stability between the second structural member 42 and the second wall 413 and the cell body 211. It is also beneficial to reduce the risk of leakage of the first adhesive material 51 and reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0126] In one embodiment, the second wall 413 includes a second connector 4131, which is connected to the first circuit board 31. This improves the stability of the connection between the first structural member 41 and the first circuit board 31 and enhances the shock resistance of the battery 100.

[0127] In one embodiment, the second connector 4131 is disposed on the inner surface of the second wall 413 and extends toward the first wall 412. The first circuit board 31 is located between the second connector 4131 and the bottom wall 411 along the first direction Z. The second connector 4131 can restrict the movement of the first circuit board 31 in the opposite direction of the first direction Z, thereby improving the shock resistance of the battery 100.

[0128] In one embodiment, the second connector 4131 is provided with a second inclined surface 41311, which is inclined in the first direction Z. Along the opposite direction of the first direction Z, the distance between the second inclined surface 41311 and the second wall 413 in the second direction Y gradually decreases. When the first structural member 41 and the first circuit board 31 are assembled close to each other along the first direction Z, the second inclined surface 41311 can play a guiding role, guiding the first circuit board 31 to move relative to the first structural member 41 until the first circuit board 31 moves between the second connector 4131 and the bottom wall 411.

[0129] In one embodiment, along the third direction X, the length of the second wall 413 is the third length, and the length of the portion of the second wall 413 that is bonded to the second structural member 42 is the fourth length. The ratio of the fourth length to the third length is greater than or equal to 0.9 and less than or equal to 1, which is beneficial to ensuring the effect of the second structural member 42 bonding the second wall 413, and also takes into account the impact on the opening 61, reducing the risk that the second structural member 42 will block the opening 61.

[0130] Optionally, the ratio of the fourth length to the third length can be any one of 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, and 1.

[0131] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the second wall 413 is not less than 5 mm, which helps to improve the stability of the bonding between the second structural member 42 and the second wall 413, reduces the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, reduces the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improves the shock resistance of the battery.

[0132] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the second end face 23 is not less than 5mm. This is beneficial to improve the stability of the bonding between the second structural member 42 and the second end face 23, reduce the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improve the shock resistance of the battery.

[0133] like Figure 9 and Figure 13As shown, in one embodiment, when viewed along the third direction X, the third wall 414 overlaps with the first side surface 24, which is beneficial to improving the bonding effect of the second structural member 42 to the third wall 414 and the first side surface 24, improving the connection stability of the second structural member 42 to the first structural member 41 and the cell body 211, and also helps to reduce the risk of leakage of the first adhesive material 51, reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improve the shock resistance of the battery.

[0134] In one embodiment, the third wall 414 extends beyond the first circuit board 31 in the opposite direction of the first direction Z. The second structural member 42 is bonded to at least a portion of the third wall 414 that extends beyond the first circuit board 31. This is beneficial to improving the connection stability between the second structural member 42 and the third wall 414 and the cell body 211. It is also beneficial to reduce the risk of leakage of the first adhesive material 51, reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improve the shock resistance of the battery.

[0135] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the third wall 414 is not less than 5mm, which helps to improve the stability of the bonding between the second structural member 42 and the third wall 414, reduces the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, reduces the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improves the shock resistance of the battery.

[0136] In one embodiment, along the first direction Z, the length of the bonding area between the second structural member 42 and the first side surface 24 is not less than 5mm, which helps to improve the stability of the bonding between the second structural member 42 and the first side surface 24, reduces the risk of leakage of the first adhesive material 51 due to the weak bonding of the second structural member 42, reduces the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improves the shock resistance of the battery.

[0137] like Figure 3 and Figure 10 As shown, in one embodiment, the first structural member 41 further includes a fourth wall 415, which is connected to the bottom wall 411 and extends in the opposite direction to the first direction Z. Along the third direction X, the fourth wall 415 and the third wall 414 are arranged in a symmetrical arrangement. Along the first direction Z, the fourth wall 415 and the second side surface 25 are arranged at intervals.

[0138] In one embodiment, the length of the fourth wall 415 is less than the lengths of the first wall 412, the second wall 413, and the third wall 414 in the opposite direction of the first direction Z. This facilitates the formation of an opening 61 in the first region 60 in the region of the fourth wall 415, which makes it easier to inject the first adhesive material 51 into the first region 60.

[0139] In one embodiment, when viewed in the first direction Z, the first wall 412 and the fourth wall 415 are separate. The area where the first wall 412 and the fourth wall 415 are separate can form an opening 61 in the first region 60, facilitating the injection of the first adhesive material 51 into the first region 60.

[0140] In one embodiment, when viewed in the first direction Z, the second wall 413 is separate from the fourth wall 415. The area where the second wall 413 and the fourth wall 415 are separate can form an opening 61 in the first region 60, facilitating the injection of the first adhesive material 51 into the first region 60.

[0141] like Figure 13 As shown, in one embodiment, the fourth wall 415 extends beyond the first circuit board 31 in the opposite direction of the first direction Z, which helps to improve the connection stability between the first structural member 41 and the first circuit board 31 and improve the shock resistance of the battery 100. In one embodiment, the fourth wall 415 and the third wall 414 cooperate to restrict the movement of the first circuit board 31 in the third direction X.

[0142] like Figure 14 , Figure 15 and Figure 16 As shown, in one embodiment, the battery 100 further includes a third structural member 43, which is bonded to the fourth wall 415 and the second side 25. This helps to further seal the first region 60, reduce the risk of leakage of the first adhesive material 51 from the first region 60, improve the filling effect of the first adhesive material 51 in the first region 60, and also reduce the impact of the first adhesive material 51 on the assembly and space utilization of the battery 100.

[0143] In one embodiment, the second structural member 42 includes a first end 421 and a second end 422 (e.g., Figure 9 As shown), the first end 421 is connected to the first wall 412, and the second end 422 is connected to the second wall 413.

[0144] In one embodiment, when viewed along the first direction Z, the first wall 412 is separated from the third structural member 43, and the first end 421 is separated from the third structural member 43, so that the gap between the first wall 412 and the fourth wall 415 can form an opening 61, which facilitates the injection of the first adhesive material 51.

[0145] In one embodiment, when viewed along the first direction Z, the second wall 413 is separated from the third structural member 43, and the second end 422 is separated from the third structural member 43, so that the gap between the second wall 413 and the fourth wall 415 can form an opening 61, which facilitates the injection of the first adhesive material 51.

[0146] In one embodiment, along the first direction Z, the length of the bonding area between the third structural member 43 and the fourth wall 415 is not less than 5mm, which is beneficial to improve the stability of the bonding between the third structural member 43 and the fourth wall 415, reduce the risk of leakage of the first adhesive material 51 due to the weak bonding of the third structural member 43, reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improve the shock resistance of the battery.

[0147] In one embodiment, along the first direction Z, the length of the bonding area between the third structural member 43 and the second side surface 25 is not less than 5mm, which is beneficial to improve the stability of the bonding between the third structural member 43 and the second side surface 25, reduce the risk of leakage of the first adhesive material 51 due to the weak bonding of the third structural member 43, reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100, and improve the shock resistance of the battery.

[0148] like Figure 9 and Figure 16 As shown, in one embodiment, when injecting the first adhesive material 51, the cell assembly 20, the first circuit board 31, the first structural member 41, and the second structural member 42 are connected and placed on their sides, with the first side 24 facing down and the second side 25 facing up. The first adhesive material 51 is injected into the first region 60 through the opening 61 between the first wall 412 and the fourth wall 415 or the opening 61 between the second wall 413 and the fourth wall 415. The first adhesive material 51 can flow and fill in the first region 60 under the action of gravity, which is beneficial to improving the filling effect of the first adhesive material 51 in the first region 60, improving the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural member 41, the second structural member 42, and the cell body 211, and improving the shock resistance of the battery 100.

[0149] Furthermore, the second structural component 42, the first wall 412, the second wall 413, the third wall 414, the fourth wall 415, and the third structural component 43 can act as a sealant, reducing the risk of leakage of the first adhesive material 51 from the first region 60. During the process of the first adhesive material 51 flowing and filling in the first region 60, under the sealing effect of the second structural component 42, the first wall 412, the second wall 413, the third wall 414, the fourth wall 415, and the third structural component 43, it can flow and fill the gaps in the first region 60, improving its filling effect. It also helps to reduce the impact of the first adhesive material 51 overflowing on the internal space of the battery 100, and improve the shock resistance of the battery.

[0150] In one embodiment, the third structural component 43 is an adhesive tape. In another embodiment, the third structural component 43 is an adhesive tape formed by combining BOPP film, PE film, or PVC film with acrylic pressure-sensitive adhesive.

[0151] like Figure 5As shown, in one embodiment, the battery 100 further includes a second circuit board 32, which is disposed within the housing 10 and located on the side of the first structural member 41 opposite to the cell assembly 20. The second circuit board 32 is connected to each cell unit 21 in the cell assembly 20 and is used to collect information from each cell unit 21 and control each cell unit 21.

[0152] In one embodiment, the second circuit board 32 includes a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as data acquisition, control, protection, communication, power calculation, signal transmission, and power transmission for the battery cell unit 21.

[0153] like Figure 2 , Figure 5 , Figure 16 and Figure 17 As shown, in one embodiment, the battery 100 further includes a first connection terminal 71 and a second connection terminal 72. The first connection terminal 71 connects to the cell assembly 20 and the second circuit board 32, and the second connection terminal 72 connects to the cell assembly 20 and the second circuit board 32, so that the second circuit board 32 can connect to and control each cell unit 21 in the cell assembly 20.

[0154] In one embodiment, the first connection terminal 71 is electrically connected to each battery cell unit 21 via a connection to the first circuit board 31. In another embodiment, the second connection terminal 72 is electrically connected to each battery cell unit 21 via a connection to the first circuit board 31.

[0155] In one embodiment, the bottom wall 411 is provided with a through hole 4111. A portion of the first connecting terminal 71 is accommodated in the first region 60 and the first through hole 4111, and a portion of the first connecting terminal 71 extends out of the bottom wall 411 on the side opposite to the first circuit board 31. The first connecting terminal 71 connects to the cell assembly 20 and the second circuit board 32 through the first through hole 4111, which helps to reduce the impact of the first connecting terminal 71 on the internal space of the battery 100 and improve the space utilization and energy density of the battery 100.

[0156] In one embodiment, the battery 100 further includes a second adhesive material (not shown), which fills the gap between the first connecting terminal 71 and the first through hole 4111. This helps to improve the connection stability between the first connecting terminal 71 and the first structural member 41, and improves the shock resistance of the battery 100. The second adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material 51 from the first through hole 4111 and improving the filling effect of the first adhesive material 51.

[0157] In one embodiment, the second adhesive is formed by curing a structural adhesive. In another embodiment, the second adhesive is formed by curing one or more of epoxy resin, neoprene rubber, polyurethane, and silicone rubber.

[0158] In one embodiment, a portion of the first adhesive material 51 is located in the gap between the first connecting terminal 71 and the first through hole 4111 (e.g., Figure 16 As shown, this is beneficial to improving the connection stability between the first connection terminal 71 and the first structural component 41, and improving the shock resistance of the battery 100.

[0159] In one embodiment, the bottom wall 411 is provided with a through second hole 4112. A second connecting terminal 72 connects the cell assembly 20 and the second circuit board 32. A portion of the second connecting terminal 72 is accommodated in the first region 60 and the through hole 4112, while another portion extends out of the bottom wall 411 on the side opposite to the first circuit board 31. The second connecting terminal 72 connects the cell assembly 20 and the second circuit board 32 through the second through hole 4112, which helps to reduce the impact of the second connecting terminal 72 on the internal space of the battery 100 and improves the space utilization and energy density of the battery 100.

[0160] In one embodiment, the battery 100 further includes a third adhesive material (not shown), which fills the gap between the second connecting terminal 72 and the second through hole 4112. This helps to improve the connection stability between the second connecting terminal 72 and the first structural member 41, and improves the shock resistance of the battery 100. The third adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material 51 from the second through hole 4112 and improving the filling effect of the first adhesive material 51.

[0161] In one embodiment, the third adhesive is formed by curing a structural adhesive. In another embodiment, the third adhesive is formed by curing one or more of epoxy resin, neoprene rubber, polyurethane, and silicone rubber.

[0162] In one embodiment, a portion of the first adhesive material 51 is located in the gap between the second connecting terminal 72 and the second through hole 4112 (not shown), which helps to improve the connection stability between the second connecting terminal 72 and the first structural member 41 and improve the shock resistance of the battery 100.

[0163] In one embodiment, the battery 100 further includes a wiring harness 80, which connects the cell assembly 20 and the second circuit board 32, enabling the second circuit board 32 to connect to and collect information from each cell unit 21 in the cell assembly 20.

[0164] In one embodiment, the bottom wall 411 is further provided with a through third through hole 4113. A portion of the wiring harness 80 is accommodated in the first region 60 and the third through hole 4113, and a portion of the wiring harness 80 extends out of the bottom wall 411 on the side opposite to the first circuit board 31. The wiring harness 80 connects to the cell assembly 20 and the second circuit board 32 through the third through hole 4113, which helps to reduce the impact of the wiring harness 80 on the internal space of the battery 100 and improve the space utilization and energy density of the battery 100.

[0165] In one embodiment, the battery 100 further includes a fourth adhesive material (not shown), which fills the gap between the wire harness 80 and the third through hole 4113. This helps to improve the connection stability between the wire harness 80 and the first structural member 41, improve the shock resistance of the battery 100, and the fourth adhesive material can also play a sealing role, reducing the risk of leakage of the first adhesive material 51 from the third through hole 4113 and improving the filling effect of the first adhesive material 51.

[0166] In one embodiment, the fourth adhesive material is formed by curing a structural adhesive. In another embodiment, the fourth adhesive material is formed by curing one or more of epoxy resin, neoprene rubber, polyurethane, and silicone rubber.

[0167] In one embodiment, a portion of the first adhesive material 51 is located in the gap between the wire harness 80 and the third through hole 4113 (not shown), which helps to improve the connection stability between the wire harness 80 and the first structural member 41 and improve the shock resistance of the battery 100.

[0168] In one embodiment, the first structural member 41 is made of insulating plastic material, which helps to reduce the weight of the battery 100 and also helps to provide insulation, reducing the risk of short circuit in the battery 100.

[0169] In one embodiment, the first structural component 41 is formed by melting and solidifying plastic using injection molding equipment, which simplifies the manufacturing process of the first structural component 41 and saves manufacturing costs.

[0170] In one embodiment, the first structural member 41 is made of one or more of PP, PE, PVC, PC and ABS resins.

[0171] In one embodiment, the battery 100 further includes a fifth adhesive material (not shown), a portion of which is filled between different cell bodies 211 and between the cell body 211 and the casing 10. This is beneficial for improving the shock resistance of the battery 100 and for reducing the weight of the battery 100.

[0172] In one embodiment, the fifth adhesive material is formed by curing a structural adhesive. In another embodiment, the fifth adhesive material is formed by curing one or more of epoxy resin, neoprene rubber, polyurethane, and silicone.

[0173] In summary, in the battery 100 of this application, the first structural member 41 and the cell assembly 20 are bonded together by the second structural member 42 to form a first region 60, and multiple sides of the first region 60 are sealed. When the first adhesive material 51 is injected into the first region 60, flipping the battery 100 to place it on its side facilitates the flow and filling of the first adhesive material 51 in the first region 60, improves the filling effect of the first adhesive material 51 in the first region 60, improves the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural member 41, the second structural member 42 and the cell body 211, improves the shock resistance of the battery 100, and also helps to reduce the overflow of the first adhesive material 51 and reduce the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0174] like Figure 18 As shown, embodiments of this application also provide an electrical device 200, including the battery 100 described in any of the foregoing embodiments.

[0175] In the aforementioned electrical equipment 200, the battery 100 is bonded to the first structural component 41 and the cell assembly 20 via the second structural component 42 to form a first region 60, and multiple sides of the first region 60 are sealed. When the first adhesive material 51 is injected into the first region 60, flipping the battery 100 to place it on its side facilitates the flow and filling of the first adhesive material 51 in the first region 60, improves the filling effect of the first adhesive material 51 in the first region 60, improves the stability of the first adhesive material 51 in connecting the first circuit board 31, the first structural component 41, the second structural component 42 and the cell body 211, improves the shock resistance of the battery 100, and reduces the impact of the battery 100 shaking on the electrical equipment 200.

[0176] In one embodiment, the electrical equipment 200 includes, but is not limited to, any one of a drone, an electric two-wheeler, a power tool, and a robot.

[0177] like Figure 19 As shown, embodiments of this application also provide a potting method, applied to the battery 100 described in any of the foregoing embodiments. The potting method includes the following steps:

[0178] S1: Before installing the battery cell assembly 20 into the housing 10, the electrode terminals 212 of the battery cell assembly 20 are connected to the first circuit board 31, the first structural component 41 is connected to the first circuit board 31, and the second structural component 42 is bonded to the first structural component 41 and the battery cell body 211, so that the battery cell body 211, the first circuit board 31 and the first structural component 41 are arranged along the first direction Z, and the second structural component 42, the first structural component 41 and the battery cell body 211 are connected to form a first region 60, and the first region 60 has an opening;

[0179] S2: The assembly after connecting the cell assembly 20, the first circuit board 31, the first structural component 41 and the second structural component 42 is placed on its side with the opening facing upwards, and the cell assembly 20, the first circuit board 31 and the first structural component 41 are arranged in a horizontal direction.

[0180] S3: Inject the first adhesive material 51 into the first region 60.

[0181] Through the above-described potting method, the first adhesive material 51 is poured into the first region 60 through the upward-facing opening. Under its own weight, the first adhesive material 51 flows within the first region 60, which helps to improve the filling effect of the first adhesive material 51 within the first region 60, improve the shock resistance of the battery 100, and also helps to reduce the overflow of the first adhesive material 51, thus reducing the impact of the overflow of the first adhesive material 51 on the internal space of the battery 100.

[0182] In one embodiment, the opening is oriented perpendicular to the first direction Z.

[0183] In step S2, placing the assembly after connecting the cell assembly 20, the first circuit board 31, the first structural component 41, and the second structural component 42 on its side means flipping the assembled assembly so that the first direction Z is parallel to or approximately parallel to the horizontal direction, and the opening of the first region 60 faces upward.

[0184] If the traditional method of placing the components upright and applying adhesive from the side is used, the first adhesive material 51 enters the first region 60 in a horizontal direction. However, its fluidity within the first region 60 is poor, resulting in an unsatisfactory filling effect.

[0185] The potting method of this application can improve the filling effect of the first adhesive 51 in the first region 60.

[0186] In addition, those skilled in the art may make other changes within the spirit of this application. Of course, all such changes made in accordance with the spirit of this application should be included within the scope disclosed in this application.

Claims

1. A battery, characterized in that, include: case; A battery cell assembly is disposed within the housing. The battery cell assembly includes a battery cell unit, and the battery cell unit includes a battery cell body and electrode terminals, with the electrode terminals extending out of the battery cell body. A first circuit board is disposed inside the housing. The battery cell assembly is arranged with the first circuit board along a first direction. The electrode terminals are connected to the first circuit board. The first circuit board has a first surface and a second surface facing opposite directions. The first surface faces the battery cell body. A first structural component is disposed within the housing. The battery cell assembly, the first circuit board, and the first structural component are arranged along the first direction. At least a portion of the first structural component is disposed on the side of the first circuit board away from the battery cell body and faces the second surface. The first structural component is connected to the first circuit board. A second structural component is disposed within the housing. The second structural component is bonded to the first structural component and the battery cell assembly. The second structural component, the first structural component, and the battery cell body are connected to form a first region. The portion of the electrode terminal extending out of the battery cell body and the first circuit board are housed in the first region. A first adhesive material is at least partially filled in the first region, and the first adhesive material connects the first circuit board, the first structural component, the second structural component, and the battery cell body.

2. The battery as described in claim 1, characterized in that, The first adhesive material has pores, and the porosity of the first adhesive material is greater than or equal to 30% and less than or equal to 70%.

3. The battery as described in claim 1, characterized in that, The density of the first adhesive material is greater than or equal to 0.15 g / cm^3 and less than or equal to 0.25 g / cm^3.

4. The battery as described in any one of claims 1 to 3, characterized in that, The Shore hardness of the first adhesive material is greater than 30 HA and less than 70 HA.

5. The battery as described in claim 1, characterized in that, The battery cell assembly has a first end face and a second end face, the first end face and the second end face are respectively located at both ends of the battery cell assembly along a second direction, and the second structural member is bonded to the first end face and the second end face, the second direction being perpendicular to the first direction; The battery cell assembly also has a first side and a second side, the first side and the second side are respectively located at both ends of the battery cell assembly along a third direction, the first side and the second side are both connected to the first end face and the second end face, the second structural member is bonded to the first side, and the third direction is perpendicular to the first direction and the second direction.

6. The battery as described in claim 5, characterized in that, The first structural component includes: The bottom wall is located on the side of the first circuit board that is away from the battery cell body; The first wall is connected to the bottom wall and extends in the opposite direction to the first direction; The second wall is connected to the bottom wall and extends in the opposite direction to the first direction. The first wall and the second wall are arranged in the second direction. A third wall is connected to the bottom wall and extends in the opposite direction to the first direction, the third wall connecting the first wall and the second wall; A portion of the second structural component is bonded to the first wall and the first end face; a portion of the second structural component is bonded to the second wall and the second end face; and a portion of the second structural component is bonded to the third wall and the first side face. The bottom wall, the first wall, the second wall, the third wall, the second structural member, and the battery cell body form the first region.

7. The battery as described in claim 6, characterized in that, When viewed along the second direction, the first wall overlaps with the first end face, and the second wall overlaps with the second end face; Viewed along the third direction, the third wall overlaps with the first side.

8. The battery as described in claim 6, characterized in that, The first wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member is bonded to at least a portion of the first wall that extends beyond the first circuit board; And / or, The second wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member adheres to at least a portion of the second wall extending beyond the first circuit board; And / or, The third wall extends beyond the first circuit board in the opposite direction to the first direction, and the second structural member adheres to at least a portion of the third wall extending beyond the first circuit board.

9. The battery as claimed in claim 8, characterized in that, The first wall includes a first connector, which is connected to the first circuit board; and / or, The second wall includes a second connector, which is connected to the first circuit board.

10. The battery as claimed in claim 6, characterized in that, The first structural member further includes a fourth wall, which is connected to the bottom wall and extends in the opposite direction to the first direction; Along the third direction upwards, the fourth wall and the third wall are arranged in a symmetrical arrangement.

11. The battery as claimed in claim 10, characterized in that, In the opposite direction to the first direction, the length of the fourth wall is less than the length of the first wall, the length of the second wall, and the length of the third wall.

12. The battery as claimed in claim 10, characterized in that, Viewed in the first direction, at least one of the first wall and the second wall is separate from the fourth wall.

13. The battery as claimed in claim 10, characterized in that, In the opposite direction to the first direction, the fourth wall extends beyond the first circuit board.

14. The battery as claimed in claim 10, characterized in that, The battery also includes a third structural component, which is bonded to the fourth wall and the second side surface.

15. The battery as claimed in claim 6, characterized in that, The second structural member includes a first end and a second end, wherein the first end is connected to the first wall and the second end is connected to the second wall.

16. The battery as claimed in claim 15, characterized in that, Along the third direction upward, the length of the first wall is the first length, the length of the portion of the first wall bonded by the second structural member is the second length, and the ratio of the second length to the first length is greater than or equal to 0.9 and less than or equal to 1; Along the third direction, the length of the second wall is the third length, the length of the portion of the second wall bonded to the second structural member is the fourth length, and the ratio of the fourth length to the third length is greater than or equal to 0.9 and less than or equal to 1.

17. The battery as claimed in claim 1, characterized in that, The first structural component includes a bottom wall, a first through hole and a second through hole penetrating the bottom wall, and along the first direction, the bottom wall is located on the side of the first circuit board opposite to the battery cell body; The battery further includes a second circuit board, a first connection terminal, and a second connection terminal, wherein the second circuit board, the first connection terminal, and the second connection terminal are disposed inside the housing; Along the first direction, the second circuit board is located on the side of the bottom wall opposite to the first circuit board; The first connection terminal connects the cell assembly and the second circuit board. A portion of the first connection terminal is accommodated in the first region and the first through hole. A portion of the first connection terminal extends out of the bottom wall on the side opposite to the first circuit board. The second connection terminal connects the cell assembly and the second circuit board. A portion of the second connection terminal is accommodated in the first region and the second through hole, and a portion of the second connection terminal extends out of the bottom wall on the side opposite to the first circuit board.

18. The battery as claimed in claim 17, characterized in that, The battery also includes: A second adhesive material is used to fill the gap between the first connecting terminal and the first through hole; and / or, A third adhesive material is used to fill the gap between the second connecting terminal and the second through hole.

19. The battery as claimed in claim 17, characterized in that, The first structural member also includes a third through hole penetrating the bottom wall; The battery also includes a wiring harness that connects the cell assembly and the second circuit board. A portion of the wiring harness is housed in the first region and the third through hole, and a portion of the wiring harness extends out of the bottom wall on the side opposite to the first circuit board.

20. The battery as claimed in claim 19, characterized in that, The battery also includes a fourth adhesive material that fills the gap between the wire harness and the third through hole.

21. The battery as claimed in claim 1, characterized in that, The battery also includes a fifth adhesive material, a portion of which is filled between different cell bodies and a portion of which is filled between the cell body and the casing.

22. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 21.

23. A potting method, applied to the battery as described in claim 1, characterized in that, Including the following steps: S 1: Before installing the battery cell assembly into the housing, the electrode terminals of the battery cell assembly are connected to the first circuit board, the first structural component is connected to the first circuit board, and the second structural component is bonded to the first structural component and the battery cell body, so that the battery cell body, the first circuit board and the first structural component are arranged along the first direction, and the second structural component, the first structural component and the battery cell body are connected to form a first region, and the first region has an opening; S2: The assembly after connecting the cell assembly, the first circuit board, the first structural component and the second structural component is placed on its side with the opening facing upwards, and the cell assembly, the first circuit board and the first structural component are arranged in a horizontal direction. S3: Inject the first adhesive material into the first region.

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