Battery, power consuming device, and method for manufacturing battery

Abstract

The application provides a battery, a power utilization device and a preparation method of the battery. The battery comprises: a battery module comprising a first battery monomer and a second battery monomer arranged in series along the length direction of the battery, a first electrode output part of the first battery monomer and a second electrode output part of the second battery monomer being electrically connected through welding; a support is arranged between the two battery monomers, the support is provided with a first accommodating space, the first accommodating space is used for accommodating the first electrode output part and the second electrode output part; a structural adhesive is used for fixedly connecting the first electrode output part and the second electrode output part with the support; the support is provided with a glue pouring channel used for guiding the structural adhesive into the space between the first electrode output part, the second electrode output part and the support. The battery and the power utilization device provided by the application can reduce the tearing risk of the connection part of the battery monomer.

Description

Technical Field

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

[0002] To increase battery capacity, multiple battery cells connected in series are typically housed within a robust casing to form a battery. Since the reliability of a battery's operation directly impacts the safety of the entire battery and even the electrical device being used, battery design places high demands on the stability of its electrical connections. Summary of the Invention

[0003] This application provides a battery, an electrical device, and a method for manufacturing the battery, which can reduce the risk of tearing at the connection points of battery cells.

[0004] In a first aspect, a battery is provided, comprising: a battery module including a first battery cell and a second battery cell connected in series along a first direction, wherein a first electrode output portion of the first battery cell and a second electrode output portion of the second battery cell are electrically connected by welding, the first direction being the length direction of the battery; a bracket disposed between the first battery cell and the second battery cell, the bracket having a first receiving space for accommodating the electrically connected first electrode output portion and second electrode output portion; structural adhesive for fixing the first electrode output portion and the second electrode output portion to the bracket; and the bracket having an adhesive channel for introducing structural adhesive between the electrically connected first electrode output portion and the second electrode output portion and the bracket.

[0005] In this embodiment, a bracket is provided between the first battery cell and the second battery cell, so that the connected first electrode output and the second electrode output are placed in the first receiving space of the bracket. An adhesive channel is provided on the bracket to introduce structural adhesive between the connected first electrode output and the second electrode output and the bracket, thereby fixing the connected first electrode output and the second electrode output to the bracket, strengthening the rigidity between the series-connected battery module and the bracket, thereby preventing the connected first electrode output and the second battery electrode output from shaking in the first receiving space of the bracket, reducing the risk of tearing, and improving the electrical connection stability of the battery.

[0006] In one possible implementation, the bracket includes: a bracket body; a first fastener, stacked with the bracket body in a third-party upward direction, the third-party direction being the thickness direction of the battery; wherein a first receiving space is formed between the bracket body and the first fastener, and the potting channel includes a first injection hole disposed on the first fastener.

[0007] In this embodiment, by stacking the support body and the first fixing member in the third direction, a first receiving space can be formed to restrict the displacement of the first electrode output part and the second electrode output part in the third direction. Furthermore, a first injection hole is provided on the first fixing member, which allows structural adhesive to be injected from the first injection hole into the space between the first electrode output part, the second electrode output part and the support to fix the first electrode output part and the second electrode output part and the support, thereby reducing the risk of tearing at the connection between the first electrode output part and the second electrode output part.

[0008] In one possible implementation, the first fastener includes a first wall and two first side walls, the first wall being disposed opposite to the bracket body, the two first side walls extending from both ends of the first wall toward the bracket body in a first direction, and the first injection hole being disposed on the first wall.

[0009] In one possible implementation, the battery module further includes: a third battery cell and a fourth battery cell connected in series along the first direction, the third electrode output of the third battery cell and the fourth electrode output of the fourth battery cell being electrically connected, the third battery cell and the first battery cell being stacked along the third direction, and the fourth battery cell and the second battery cell being stacked along the third direction.

[0010] In this embodiment, arranging multiple battery cells in multiple rows along a first direction can improve the energy density of the battery.

[0011] In one possible implementation, the bracket further includes: a second fixing member, stacked on top of the bracket body in a third direction, the bracket body being disposed between the first fixing member and the second fixing member, forming the second receiving space between the bracket body and the second fixing member; wherein the structural adhesive is also used to fix the third electrode output portion and the fourth electrode output portion to the bracket, and the adhesive channel is also used to introduce the structural adhesive between the third electrode output portion and the fourth electrode output portion and the bracket.

[0012] In this embodiment, by stacking the bracket body and the second fastener in the third direction, a second receiving space can be formed to restrict the displacement of the third electrode output and the fourth electrode output in the third direction. Furthermore, the potting channel can introduce structural adhesive between the third electrode output and the fourth electrode output and the bracket to fix the third electrode output and the fourth electrode output and the bracket, thereby reducing the risk of tearing at the connection between the third electrode output and the fourth electrode output.

[0013] In one possible implementation, the glue channel further includes a second glue injection hole disposed on the bracket body. The second glue injection hole is used to introduce the structural glue between at least one of the first battery cell, the second battery cell, the third battery cell, and the fourth battery cell and the bracket body, so as to fix the at least one battery cell to the bracket.

[0014] In this embodiment, structural adhesive is used to fix the battery cell to the bracket, which can enhance the rigidity between the battery cell and the bracket, prevent relative displacement between the battery cell and the bracket, and reduce damage to the battery cell.

[0015] In one possible implementation, the support body has a cavity.

[0016] In this embodiment, the support body is configured with a cavity structure, which can reduce the weight of the support and thus the weight of the battery.

[0017] In one possible implementation, the cavity includes two connecting arms distributed along the first direction and two support walls distributed along the third direction, with the second injection hole disposed on at least one of the two connecting arms and at least one of the two support walls.

[0018] In one possible implementation, the second injection hole is provided on the two connecting arms and the two support walls.

[0019] In this embodiment, the second injection hole is set on the two connecting arms and two supporting walls of the bracket body, which can introduce structural adhesive between each battery cell and the bracket, thereby strengthening the rigidity between the battery module and the bracket.

[0020] In one possible implementation, the second injection hole is also used to introduce the structural adhesive between the first battery cell and the third battery cell, and between the second battery cell and the fourth battery cell.

[0021] In one possible implementation, in the third direction, the size of the battery module is H1, the size of the area covered by the structural adhesive is H2, 1 / 3≤H2 / H1≤1, and the third direction is the thickness direction of the battery.

[0022] In this embodiment, in the third direction, the size H2 of the structural adhesive coverage area and the size of the battery module are set to 1 / 3≤H2 / H1≤1. This can avoid the problem of insufficient strength caused by the adhesive area being too thin, which would fail to meet the mechanical strength requirements, and also avoid the problem of abnormal battery module assembly and appearance caused by the adhesive area being too thick.

[0023] In one possible implementation, any single battery cell in the battery module includes a main body, an electrode output section, and a stepped section, with the main body and the electrode output section connected via the stepped section.

[0024] In one possible implementation, on the third direction, the dimension of the step is H3, the dimension of the main body is H4, and 1 / 3 ≤ H3 / H4 ≤ 1.

[0025] In this embodiment, in the third direction, the dimensions H3 of the step and H4 of the main body are set to 1 / 3≤H3 / H4≤1, which can avoid structural weak points caused by uneven coverage of structural adhesive due to the large height difference between the step and the main body.

[0026] In one possible implementation, in the first direction, the step portion has a size of L2, and the structural adhesive covering the step portion has a size of L1, where 1 / 3 ≤ L1 / L2 ≤ 1.

[0027] In this embodiment, in the first direction, the dimensions L2 of the step portion and the dimensions L1 of the structural adhesive covering the step portion are set to 1 / 3≤L1 / L2≤1. This avoids the problem of insufficient adhesive application failing to meet the rigidity requirements, while also preventing excessive adhesive application that overflows into the main body, leading to localized stress concentration in the battery cells.

[0028] In one possible implementation, the structural adhesive covers part of the upper surface and part of the lower surface of the battery module.

[0029] In this embodiment, structural adhesive covers part of the upper surface and part of the lower surface of the battery module, forming a riveting structure with the battery module, making the connection between the battery module and the bracket more stable.

[0030] In one possible implementation, in the second direction, the size of the bracket is larger than the size of the battery module; and / or, in the third direction, the size of the bracket is larger than the size of the battery module.

[0031] In this embodiment, the bracket is set to be larger than the battery module size in the third direction and in the second direction. This allows the bracket to contact the casing first when the battery is subjected to vibration and impact, thus providing a buffer and reducing damage to individual battery cells.

[0032] In one possible implementation, a first reinforcing rib extending from the first wall toward the support body is provided between the two first sidewalls.

[0033] In this embodiment, a first reinforcing rib is provided on the first wall to enhance the rigidity of the first wall.

[0034] In one possible implementation, a plurality of the first reinforcing ribs are spaced apart along the first direction and / or the second direction; or, a plurality of the first reinforcing ribs are intersected along the first direction and the second direction.

[0035] In this embodiment, multiple first reinforcing ribs are arranged along a first direction and / or a second direction to enhance the support for the first electrode output portion and the second electrode output portion.

[0036] In one possible implementation, the first wall is provided with two symmetrical first slot structures for external assembly equipment to grip the first fastener.

[0037] In this embodiment, two symmetrical first slot structures are provided on the first wall of the first fastener, which facilitates the external assembly equipment to grasp the first fastener and improves assembly efficiency.

[0038] In one possible implementation, the bracket body includes a first support wall with a first mounting hole, and the first fastener has a first buckle extending toward the first support wall at at least one end in a second direction, the first buckle engaging with the first mounting hole, the second direction being the width direction of the battery.

[0039] In this embodiment, the bracket body and the first fixing member can be fixedly connected by the first buckle on the first fixing member and the first mounting hole on the first support wall, thereby restricting the connected first electrode output part and the second battery electrode output part within the first accommodating space between the first support wall and the first fixing member.

[0040] In one possible implementation, the first support wall is provided with a first stop at one end in the second direction, the first stop being used to limit the movement of the first electrode output section and the second electrode output section along the second direction.

[0041] In this embodiment, a first stop is provided in the first support wall to limit the first electrode output part and the second electrode output part in the second direction, which can reduce the risk of tearing caused by the shaking of the first electrode output part and the second electrode output part after connection.

[0042] In one possible implementation, the first support wall is provided with a first receiving groove extending along the second direction, the first receiving groove accommodating a first sampling terminal, the first sampling terminal being used to collect parameters of the first battery cell and / or the second battery cell.

[0043] In this embodiment, by providing a first receiving groove on the first support wall to accommodate the first sampling terminal, real-time monitoring of the first battery cell and / or the second battery cell can be achieved, thereby improving battery safety.

[0044] In one possible implementation, in the third direction, the second fastener and the first fastener are symmetrically arranged relative to the bracket body.

[0045] In this embodiment, the second fixing member and the first fixing member are symmetrically arranged relative to the bracket body, which can reduce the manufacturing difficulty of the bracket.

[0046] In one possible implementation, the battery further includes a housing for accommodating the battery module and the support.

[0047] In one possible implementation, the housing has an opening, and the battery further includes an end cap that covers the opening to encapsulate the battery module and the bracket within the housing; the end cap has a positive electrode terminal and a negative electrode terminal, the positive electrode terminal being electrically connected to the positive output portion of the battery module, and the negative electrode terminal being electrically connected to the negative output portion of the battery module.

[0048] In a second aspect, an electrical device is provided, comprising: a battery as described in the first aspect and any possible implementation thereof, the battery being used to provide electrical energy to the electrical device.

[0049] Thirdly, a method for manufacturing a battery is provided, comprising: welding a first electrode output portion of a first battery cell and a second electrode output portion of a second battery cell, the first battery cell and the second battery cell being arranged side by side along a first direction, the first direction being the length direction of the battery; assembling the welded first electrode output portion and the second electrode output portion along a second direction into a first receiving space of a bracket, the second direction being the width direction of the battery; and injecting structural adhesive from a potting channel on the bracket, so that the structural adhesive is introduced between the first electrode output portion, the second electrode output portion and the bracket. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of a vehicle disclosed in an embodiment of this application.

[0052] Figure 2 This is a three-dimensional schematic diagram of a battery disclosed in an embodiment of this application.

[0053] Figure 3 This is a three-dimensional schematic diagram of another battery disclosed in the embodiments of this application.

[0054] Figure 4 A schematic perspective view of the bracket according to an embodiment of this application is shown.

[0055] Figure 5 A schematic exploded view of the bracket according to an embodiment of this application is shown.

[0056] Figure 6 It shows Figure 4 A schematic three-dimensional view of the support body in the diagram.

[0057] Figure 7 It shows Figure 4 A schematic perspective view of the first and second fixing components.

[0058] Figure 8 It shows Figure 4 Another schematic perspective view of the first and second fasteners.

[0059] Figure 9 It shows Figure 4 Another schematic three-dimensional view of the support body in the diagram.

[0060] Figure 10 It shows Figure 3 A partial front view of the battery 100 shown.

[0061] Figure 11 for Figure 3 The front view of battery 100 shown.

[0062] Figure 12 for Figure 3 A top view of the battery 100 shown.

[0063] Figure 13 This is a schematic exploded view of a battery disclosed in this application.

[0064] Figure 14 This is a schematic block diagram illustrating a battery preparation method according to an embodiment of this application.

[0065] The accompanying drawings are not drawn to scale. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0068] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0070] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0072] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, cuboid / square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0073] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be carried without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The diaphragm can be made of PP or PE, etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0074] To increase battery capacity, multiple battery cells connected in series are typically housed within a robust casing to form a battery. During use, the connections between the battery cells can wobble, posing a risk of tearing.

[0075] The applicant proposed that a bracket could be installed between two series-connected battery cells, with the connection points of the two battery cells positioned within the bracket's accommodating space. This would better secure the connection points of the battery cells, prevent them from shaking, thereby reducing the risk of tearing and improving the electrical connection stability of the battery.

[0076] Although the bracket can increase the overall rigidity of the battery, the applicant found that there is still a gap between the bracket and the battery cell connection, which causes the connection to wobble, meaning there is still a risk of tearing.

[0077] In view of this, this application proposes a battery in which a bracket is provided on a support for two battery cells connected in series, such that the connection point of the two battery cells is located within the receiving space of the bracket, and an adhesive channel is provided on the bracket to introduce structural adhesive between the connection point and the bracket, thereby fixing the connection point to the bracket, strengthening the rigidity between the series battery module and the bracket, thereby preventing the connection point from shaking within the receiving space of the bracket, reducing the risk of tearing, and improving the electrical connection stability of the battery.

[0078] The technical solutions described in the embodiments of this application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, electric vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0079] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical devices described above, but can also be applied to all devices that use batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0080] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 80, a controller 60, and a battery 100 can be installed inside vehicle 1. The controller 60 controls the battery 100 to supply power to the motor 80. For example, the battery 100 can be installed at the bottom, front, or rear of vehicle 1. The battery 100 can be used to power vehicle 1. For example, the battery 100 can serve as the operating power source for vehicle 1, for example, for the electrical system of vehicle 1, such as for the power requirements of vehicle 1's starting, navigation, and operation. In another embodiment of this application, the battery 100 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0081] Figure 2 A schematic perspective view of a battery 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery 100 includes a battery module 110, which includes a first battery cell 111 and a second battery cell 112 connected in series along a first direction X. The first electrode output portion 111a of the first battery cell 111 and the second electrode output portion 112a of the second battery cell 111 are electrically connected by welding. The first direction X is the length direction of the battery 100. The battery 100 also includes a support 120, which is disposed between the first battery cell 111 and the second battery cell 112. The support 120 has a first receiving space 121 for accommodating the first electrode output portion 111a and the second electrode output portion 112a. The battery 100 also includes structural adhesive 170 (see [reference needed]). Figure 10The bracket 120 is provided with an adhesive channel 130 for introducing structural adhesive between the first electrode output section 111a and the second electrode output section 112a and the bracket 120, so as to fix the first electrode output section 111a and the second electrode output section 112a to the bracket 120.

[0082] For ease of description, we will first define the various directions here. For example... Figure 2 As shown, the first direction X is the length direction of the battery 100, the second direction Y is the width direction of the battery 100, and the third direction Z is the thickness direction of the battery 100.

[0083] The electrode output section in this application may refer to the part of the electrode tab that extends out of the outer packaging of the battery cell as described above, or it may be understood as an electrical connection piece that is electrically connected to the electrode tab outside the outer packaging of the battery cell. This application does not limit this aspect.

[0084] Optionally, the battery module 110 may include multiple battery cells connected in series, meaning the positive output of one battery cell is connected to the negative output of an adjacent battery cell. The multiple battery cells can be arranged as follows: Figure 2 As shown, the cells are arranged in a single row along the first direction X. Optionally, multiple battery cells can also be arranged in multiple rows along the first direction X.

[0085] In this embodiment, the first electrode output portion 111a of the first battery cell 111 and the second electrode output portion 112a of the second battery cell 112 are electrically connected by welding. This connection can include ultrasonic welding or laser welding. Optionally, the first electrode output portion 111a and the second electrode output portion 112a can be directly welded or welded using a connector. Since the first electrode output portion 111a of the first battery cell 111 and the second electrode output portion 112a of the second battery cell 112 are welded before assembling the bracket 120, the connected first electrode output portion 111a and the second electrode output portion 112a can be inserted into the first receiving space 121 of the bracket 120 along the second direction Y.

[0086] Therefore, a bracket 120 is provided between the first battery cell 111 and the second battery cell 112, so that the connected first electrode output 111a and second electrode output 112a are placed in the first receiving space 121 of the bracket 120. An adhesive channel 130 is provided on the bracket 120 to introduce structural adhesive 170 between the connected first electrode output 111a and second electrode output 112a and the bracket 120. This can fix the connected first electrode output 111a and second electrode output 112a to the bracket 120, strengthen the rigidity between the series-connected battery module 110 and the bracket 120, and prevent the connected first electrode output 111a and second electrode output 112a from shaking in the first receiving space 121 of the bracket 120, reduce the risk of tearing, and improve the electrical connection stability of the battery 100.

[0087] Although the embodiments of this application are described using the connection between the first battery cell 111 and the second battery cell 112 as an example, when two or more battery cells are arranged in a row, the battery 100 of this application may include multiple brackets. The structure and function of each bracket can be referred to the bracket 120 between the first battery cell 111 and the second battery cell 112. For the sake of brevity, this article will not describe the brackets between other battery cells in detail.

[0088] Figure 3 Another schematic perspective view of the battery 100 according to an embodiment of this application is shown. Figure 3 As shown, the battery 100 includes a battery module 110. The battery module 110 includes a first battery cell 111 and a second battery cell 112 connected in series along a first direction X. The battery module 110 also includes a third battery cell 113 and a fourth battery cell 114 connected in series along the first direction X. The first battery cell 111 and the third battery cell 113 are stacked along a third direction Z, and the second battery cell 112 and the fourth battery cell 114 are stacked along a third direction Z. The first electrode output portion 111a of the first battery cell 111 and the second electrode output portion 112a of the second battery cell 112 are electrically connected by welding. The third electrode output portion 113a of the third battery cell 113 and the fourth electrode output portion 114a of the fourth battery cell 114 are electrically connected by welding.

[0089] In this embodiment, arranging multiple battery cells in multiple rows along the first direction X can improve the energy density of the battery 100.

[0090] Similarly, in this embodiment, the third electrode output portion 113a of the third battery cell 113 and the fourth electrode output portion 114a of the fourth battery cell 114 are electrically connected by welding. This may include ultrasonic welding or laser welding. Optionally, the third electrode output portion 113a and the fourth electrode output portion 114a can be directly welded or welded through a connector.

[0091] Optionally, such as Figure 3 As shown, the battery 100 also includes a bracket 120, which has a first receiving space 121 and a second receiving space 122. The first receiving space 121 and the second receiving space 122 are spaced apart along a third direction Z. The first receiving space 121 is used to receive the first electrode output 111a and the second electrode output 112a, and the second receiving space 122 is used to receive the third electrode output 113a and the fourth electrode output 114a. The bracket 120 is also provided with an adhesive channel 130 for introducing structural adhesive 170 between the first electrode output 111a and the second electrode output 112a and the bracket 120, so as to fix the electrically connected first electrode output 111a and the second electrode output 112a to the bracket 120. The potting channel 130 is also used to introduce structural adhesive 170 between the third electrode output section 113a and the fourth electrode output section 114a and the bracket 120, so as to fix the electrically connected third electrode output section 113a and the fourth electrode output section 114a to the bracket 120.

[0092] In this embodiment, a bracket is used to support the connection portion of two pairs of adjacent battery cells arranged along two rows, which can strengthen the overall strength of the two adjacent rows of battery cells, thereby making it easier to assemble the battery module 110 into the casing. In addition, the potting channel on the bracket 120 can not only fix the first electrode output portion 111a and the second electrode output portion 112a to the bracket 120, but also fix the third electrode output portion 113a and the fourth electrode output portion 114a to the bracket 120, which strengthens the rigidity between the series-connected battery module 110 and the bracket 120, and prevents the first electrode output portion 111a and the second electrode output portion 112a from shaking in the first receiving space 121 of the bracket 120 and the third electrode output portion 113a and the fourth electrode output portion 114a from shaking in the second receiving space 122 of the bracket 120, reducing the risk of tearing and improving the electrical connection stability of the battery 100.

[0093] It should be noted that when the battery module 110 in this application includes multiple battery cells arranged in two or more rows along the first direction X, the bracket 120 can be provided with two or more accommodating spaces at intervals along the third direction Z, and each accommodating space can accommodate the connection part of the corresponding two battery cells. This application embodiment does not limit this.

[0094] Figure 4 A schematic perspective view of the bracket 120 according to an embodiment of this application is shown. Figure 5 for Figure 4 A schematic exploded view of the bracket 120 shown. Figure 6 It shows Figure 4 A schematic three-dimensional view of the support body 123 in the diagram. Figure 7 It shows Figure 4 A schematic perspective view of the first fixing member 124 and the second fixing member 125. Figure 8 It shows Figure 4 Another schematic perspective view of the first fastener 124 and the second fastener 125. Figure 9 It shows Figure 4 Another schematic perspective view of the support body 123. Optionally, as... Figure 4 As shown, the bracket 120 may include a bracket body 123, and the bracket 120 may also include a first fixing member 124, which is stacked with the bracket body 123 in the third direction Z. A first receiving space 121 is formed between the bracket body 123 and the first fixing member 124, and a first electrode output portion 111a and a second electrode output portion 112a are disposed within the first receiving space 121 between the first fixing member 124 and the bracket body 123. The glue-filling channel 130 includes a first glue-filling hole 131, which is disposed on the first fixing member 124.

[0095] Optionally, the support body 123 can be a plate-like structure, that is, the support body 123 is a hexahedron. For example, the support body 123 is a cuboid with all six faces being flat. As another example, the support body 123 is a hexahedron with some faces not being flat.

[0096] In this embodiment, by stacking the support body 123 and the first fixing member 124 in the third direction Z, a first receiving space 121 can be formed to restrict the displacement of the first electrode output part 111a and the second electrode output part 112a in the third direction Z. A first injection hole 131 is provided on the first fixing member 124, which allows structural adhesive 170 to be injected from the first injection hole 131 into the space between the first electrode output part 111a, the second electrode output part 112a and the support 120 to fix the first electrode output part 111a and the second electrode output part 112a and the support 120, thereby reducing the risk of tearing at the connection between the first electrode output part 111a and the second electrode output part 112a.

[0097] Optionally, such as Figure 5 As shown, the bracket body 123 includes a first support wall 1231, on which a first mounting hole 12311 is provided. At least one end of the first fixing member 124 in the second direction Y is provided with a first buckle 12411 extending toward the first support wall 1231. The first buckle 12411 engages with the first mounting hole 12311 to connect the bracket body 123 and the first fixing member 124.

[0098] In the embodiment, the bracket body 123 and the first fixing member 124 can be fixedly connected by the first buckle 12411 on the first fixing member 124 and the first mounting hole 12311 on the first support wall 1231, thereby restricting the connected first electrode output part 111a and second electrode output part 112a within the first accommodating space 121 between the first support wall 1231 and the first fixing member 124.

[0099] for Figure 3 The battery 100 shown is as follows: Figure 4 As shown, the bracket 120 may further include a second fixing member 125, which is stacked with the bracket body 123 in the third direction Z, with the bracket body 123 disposed between the first fixing member 124 and the second fixing member 125. The third electrode output portion 113a and the fourth electrode output portion 114a are disposed within the second receiving space 122 between the second fixing member 125 and the bracket body 123. Structural adhesive 170 is also used to fix the third electrode output portion 113a and the fourth electrode output portion 114a to the bracket 120, and the adhesive channel 130 is also used to introduce the structural adhesive 170 between the third electrode output portion 113a and the fourth electrode output portion 114a and the bracket.

[0100] In this embodiment, by stacking the support body 123 and the second fastener 125 in the third direction Z, a second receiving space 122 can be formed to restrict the displacement of the third electrode output portion 113a and the fourth electrode output portion 114a in the third direction Z. Furthermore, the glue channel 130 can also introduce structural adhesive 170 between the third electrode output portion 113a and the fourth electrode output portion 114a and the support 120 to fix the third electrode output portion 113a and the fourth electrode output portion 114a and the support 120, thereby reducing the risk of tearing at the connection between the third electrode output portion 113a and the fourth electrode output portion 114a.

[0101] Similarly, such as Figure 5As shown, the bracket body 123 includes a second support wall 1232, which is disposed opposite to the first support wall 1231. The second support wall 1232 is provided with a second mounting hole 12321. At least one end of the second fastener 125 in the second direction Y is provided with a second buckle 12511 extending toward the second support wall 1232. The second buckle 12511 engages with the second mounting hole 12321 to connect the bracket body 123 and the second fastener 125.

[0102] In this embodiment, the bracket body 123 and the second fixing member 125 can be connected by the second buckle 12511 on the second fixing member 125 and the second mounting hole 12321 on the second support wall 1232, thereby restricting the connected third electrode output part 113a and fourth electrode output part 114a within the second accommodating space 122 between the second support wall 1232 and the second fixing member 125.

[0103] Optionally, the first mounting hole 12311 and the second mounting hole 12321 are located at the same end of the bracket body 123 in the second direction Y.

[0104] for Figure 2 When assembling the bracket 120 between two series-connected battery cells of the battery module 110, the bracket body 123 can be first pushed along the second direction Y to below the first electrode output section 111a and the second electrode output section 112a that are electrically connected to each other. Then, the first fixing member 124 is moved downward along the third direction Z to above the first electrode output section 111a and the second electrode output section 112a, and the first buckle 12411 is inserted into the first mounting hole 12311. For Figure 3 When the battery 100 shown is assembled with the bracket 120 between two series-connected battery cells of the battery module 110, the bracket body 123 can be pushed in along the second direction Y to be below the first electrode output section 111a and the second electrode output section 112a that are electrically connected to each other and above the third electrode output section 113a and the fourth electrode output section 114a that are electrically connected to each other. Then, the first fixing member 124 is moved downward along the third direction Z to be above the first electrode output section 111a and the second electrode output section 112a and the first buckle 12411 is inserted into the first mounting hole 12311. The second fixing member 125 is moved upward along the third direction Z to be below the third electrode output section 113a and the fourth electrode output section 114a and the second buckle 12511 is inserted into the second mounting hole 12321.

[0105] In another embodiment, the first fastener 124 and / or the second fastener 125 may be fixedly connected to the bracket body 123 before the bracket 120 is installed between two battery cells connected in series. For example, the first fixing member 124 and / or the second fixing member 125 can be fixedly connected to the first end of the bracket body 123 in the second direction Y, and an opening is formed between the first fixing member 124 and / or the second fixing member 125 and the second end of the bracket body 123 in the second direction Y, so that the first fixing member 124 and / or the second fixing member 125 and the bracket body 123 form a first receiving space 121 and / or a second receiving space 122 that penetrates the bracket 120 in the first direction X and does not penetrate the bracket 120 in the second direction Y, so that when the battery module 110 is assembled with the bracket 120, the electrically connected first electrode output part 111a and the second electrode output part 112a and / or the electrically connected third electrode output part 113a and the fourth electrode output part 114a can be inserted into the first receiving space 121 and / or the second receiving space 122 along the opening formed by the first fixing member 124 and / or the second fixing member 125 and the second end of the bracket body 123 in the second direction Y.

[0106] Optionally, the first fixing member 124 and / or the second fixing member 125 are fixedly connected to the first end of the bracket body 123 in the second direction Y. This can mean that the first fixing member 124 and / or the second fixing member 125 are integrally formed with the first end, or it can mean that the first fixing member 124 and / or the second fixing member 125 are fixedly connected to the first end through an external fixing structure. Alternatively, the first fixing member 124 and / or the second fixing member 125 can be snapped into the first end first, and then the electrically connected first electrode output part 111a and second electrode output part 112a and / or the electrically connected third electrode output part 113a and fourth electrode output part 114a can be inserted into the first receiving space 121 and / or the second receiving space 122 along the opening formed at the second end.

[0107] Optionally, such as Figure 4 As shown, the glue channel 130 also includes a second glue injection hole 132, which is disposed on the bracket body 123. Optionally, for Figure 2 The battery 100 shown has a second injection hole 132 for introducing structural adhesive 170 between at least one of the first battery cell 111 and the second battery cell 112 and the support 120, so as to fix at least one battery cell to the support 120. For... Figure 3 The battery 100 shown has a second injection hole 132 for introducing structural adhesive 170 between at least one of the first battery cell 111, the second battery cell 112, the third battery cell 113 and the fourth battery cell 114 and the bracket 120, so as to fix at least one battery cell to the bracket 120.

[0108] In this embodiment, structural adhesive 170 is used to fix the battery cell to the bracket 120, which can enhance the rigidity between the battery cell and the bracket 120, prevent relative displacement between the battery cell and the bracket 120, and reduce damage to the battery cell.

[0109] Optionally, such as Figures 4 to 6 As shown, the support body 123 has a cavity 1233.

[0110] In this embodiment, the support body 123 is configured with a cavity 1233, which can reduce the weight of the support 120 and thus reduce the weight of the battery 100.

[0111] In other embodiments, the support body 123 may also be a solid plate-like structure.

[0112] Optionally, such as Figure 6 As shown, the cavity 1233 includes two connecting arms 12331 distributed along a first direction X and two support walls 12332 distributed along a third direction. The two support walls 12332 include a first support wall 1231 and a second support wall 1232. The two connecting arms 12331 include a first connecting arm 1234 and a second connecting arm 1235. A second glue injection hole 132 is provided on at least one of the connecting arms 12331 and at least one of the support walls 12332.

[0113] Alternatively, the second injection hole 132 is provided on the two connecting arms 12331 and the two support walls 12332.

[0114] In this embodiment, the second injection hole 132 is provided on the two connecting arms 12331 and the two supporting walls 12332 of the bracket body 123, which can introduce structural adhesive 170 between each battery cell and the bracket 120, thereby strengthening the rigidity between the battery module 110 and the bracket 120.

[0115] Optionally, the second injection hole 132 is also used to introduce structural adhesive 170 between the first battery cell 111 and the third battery cell 113, and between the second battery cell 112 and the fourth battery cell 114.

[0116] for Figure 4The bracket 120 shown, namely the first fixing member 124 is disposed above the bracket body 123, and the second fixing member 125 is disposed below the bracket body 123. The second glue injection holes 132 disposed on the two support walls of the bracket body 123 can also be used to introduce structural adhesive 170 between the third electrode output section 113a and the fourth electrode output section 114a and the bracket 120, so as to fix the third electrode output section 113a and the fourth electrode output section 114a to the bracket 120.

[0117] Optionally, such as Figure 7 and Figure 8 As shown, the first fastener 124 includes a first wall 1241 disposed opposite to the first support wall 1231 and two first side walls 1242 extending toward the first support wall 1231 from both sides distributed in the first direction X. The first glue injection hole 131 is disposed on the first wall 1241.

[0118] Optionally, such as Figure 8 As shown, the first fixing member 124 has a cavity inside. This arrangement can reduce the weight of the bracket 120, and thus the weight of the battery 100.

[0119] In other embodiments, the first fastener 124 may also be solid, in which case the first injection hole 131 needs to penetrate the entire first wall 1241.

[0120] In this embodiment, a first injection hole 131 is provided on the first wall 1241, which can both introduce structural adhesive 170 between the connected first electrode output part 111a and second electrode output part 112a and the bracket 120 to strengthen the connection between the connected first electrode output part 111a and second electrode output part 112a and the bracket 120, and introduce structural adhesive 170 between the first fixing member 124 and the bracket body 123 to strengthen the connection between the first fixing member 124 and the bracket body 123.

[0121] Optionally, such as Figure 7 and Figure 8 As shown, the second fastener 125 includes a second wall 1251 disposed opposite to the second support wall 1232 and two second side walls 1252 extending toward the second support wall 1232 from both sides of the second wall 1251 in the first direction X.

[0122] Optionally, such as Figure 8 As shown, the second fixing member 125 has a cavity inside. This arrangement can reduce the weight of the bracket 120, and thus the weight of the battery 100.

[0123] In other embodiments, the second fastener 125 may also be solid.

[0124] Optionally, see [link to relevant documentation] Figure 8 A first reinforcing rib 1243 extending from the first wall 1241 toward the first support wall 1231 is provided between the two first side walls 1242.

[0125] In this embodiment, a first reinforcing rib 1243 is provided on the first wall 1241 to enhance the rigidity of the first wall 1241.

[0126] Optionally, the first reinforcing rib 1243 may restrict the movement of the first electrode output portion 111a and the second electrode output portion 112a in the third direction Z.

[0127] In this embodiment, a first reinforcing rib 1243 is provided between the two first sidewalls 1242, which can limit the activity space of the first electrode output part 111a and the second electrode output part 112a, and prevent the first electrode output part 111a and the second electrode output part 112a from shaking and tearing when the battery 100 is impacted.

[0128] Similarly, such as Figure 8 As shown, a second reinforcing rib 1253 extending from the second wall 1251 toward the second support wall 1232 is provided between the two second side walls 1252.

[0129] In this embodiment, a second reinforcing rib 1253 is provided on the second wall 1251 to enhance the rigidity of the second wall 1251.

[0130] Optionally, the second reinforcing rib 1253 is used to restrict the movement of the third electrode output section 113a and the fourth electrode output section 114a in the third direction Z.

[0131] In this embodiment, a second reinforcing rib 1253 is provided between the two second sidewalls 1252, which can limit the activity space of the third electrode output section 113a and the fourth electrode output section 114a, and prevent the third electrode output section 113a and the fourth electrode output section 114a from shaking and tearing when the battery 100 is subjected to an impact.

[0132] Furthermore, in the third direction Z, the first reinforcing rib 1243 is closer to the first electrode output portion 111a and the second electrode output portion 112a relative to the two first sidewalls 1242. This arrangement facilitates support for the first electrode output portion 111a and the second electrode output portion 112a, preventing them from wobbling. In the third direction Z, the second reinforcing rib 1253 is closer to the third electrode output portion 113a and the fourth electrode output portion 114a relative to the two second sidewalls 1252. This arrangement facilitates support for the third electrode output portion 113a and the fourth electrode output portion 114a, preventing them from wobbling.

[0133] Optionally, such as Figure 8 As shown, a plurality of first reinforcing ribs 1243 may be provided on the first wall 1241, and optionally, the plurality of first reinforcing ribs 1243 may be spaced apart along a first direction X. Optionally, the plurality of first reinforcing ribs 1243 may also be spaced apart along a second direction Y. Further, the plurality of first reinforcing ribs 1243 may be arranged intersecting along the first direction X and the second direction Y.

[0134] In this embodiment, a plurality of first reinforcing ribs 1243 are arranged along the first direction X and / or the second direction Y, which can strengthen the support for the first electrode output portion 111a and the second electrode output portion 112a.

[0135] Similarly, such as Figure 8 As shown, a plurality of second reinforcing ribs 1253 may be provided on the second wall 1251, and optionally, the plurality of second reinforcing ribs 1253 may be spaced apart along the first direction X. Optionally, the plurality of second reinforcing ribs may also be spaced apart along the second direction Y. Further, the plurality of second reinforcing ribs 1253 may be arranged intersecting along the first direction X and the second direction Y.

[0136] In this embodiment, a plurality of second reinforcing ribs 1253 are arranged along the first direction X and / or the second direction Y, which can strengthen the support for the third electrode output section 113a and the fourth electrode output section 114a.

[0137] Optionally, such as Figure 7 As shown, the first wall 1241 of the first fastener 124 is provided with two symmetrical first slot structures 12412, which are used by external assembly equipment to grip the first fastener 124.

[0138] Optionally, the two first slot structures 12412 can be distributed along a first direction X or along a second direction Y. Further, as... Figure 7 As shown, the two first slot structures 12412 are stepped structures disposed in the two edge regions of the first wall 1241 in the first direction X.

[0139] In this embodiment, two symmetrical first slot structures 12412 are provided on the first wall 1241 of the first fastener 124 to facilitate the external assembly equipment to grip the first fastener 124 and improve assembly efficiency.

[0140] Similarly, such as Figure 7 As shown, the second wall 1251 of the second fastener 125 is provided with two symmetrical second slot structures 12512, which are used by external assembly equipment to grip the second fastener 125.

[0141] Optionally, the two second slot structures 12512 can be distributed along the first direction X or along the second direction Y. Further, as... Figure 7 As shown, the two second slot structures 12512 are stepped structures disposed in the two edge regions of the second wall 1251 in the first direction X.

[0142] In this embodiment, two symmetrical second slot structures 12512 are provided on the second wall 1251 of the second fastener 125 to facilitate external assembly equipment to grip the second fastener 125 and improve assembly efficiency.

[0143] Optionally, such as Figure 9 As shown, a first stop 12312 is provided at one end of the first support wall 1231 in the second direction Y. The first stop 12312 is used to limit the movement of the first electrode output section 111a and the second electrode output section 112a in the second direction Y.

[0144] In this embodiment, a first stop 12312 is provided in the first support wall 1231 to limit the first electrode output part 111a and the second electrode output part 112a in the second direction Y, which can reduce the risk of tearing caused by the shaking of the first electrode output part 111a and the second electrode output part 112a after connection.

[0145] Optionally, such as Figure 9 As shown, a second stop 12322 is provided at one end of the second support wall 1232 in the second direction Y. The second stop 12322 is used to limit the movement of the third electrode output section 113a and the fourth electrode output section 114a in the second direction Y.

[0146] In this embodiment, a second stop 12322 is provided on the second support wall 1232 to limit the third electrode output section 113a and the fourth electrode output section 114a in the second direction Y, which can reduce the risk of tearing caused by the shaking of the third electrode output section 113a and the fourth electrode output section 114a after connection.

[0147] Optionally, the second stop 12322 and the first stop 12312 are disposed at the same end of the bracket body 123 in the second direction Y to facilitate assembly.

[0148] Figure 10 It shows Figure 3 The diagram shows a partial front view of the battery 100, where the shaded area represents the region covered by the structural adhesive 170. Alternatively, as... Figure 10 As shown, on the third direction Z, the size of the battery module 110 is H1, and the size of the area covered by the structural adhesive 170 is H2, 1 / 3≤H2 / H1≤1.

[0149] Optionally, H1 can be the maximum dimension of the battery module 110 in the third direction Z. And H2 can be the maximum dimension of the coverage area of ​​the structural adhesive 170 in the third direction Z.

[0150] In this embodiment, on the third-party direction Z, the size H2 of the coverage area of ​​the structural adhesive 170 and the size of the battery module 110 are set to 1 / 3≤H2 / H1≤1. After extensive experimental verification by the applicant, when the ratio of H2 / H1 is within the above range, it can avoid the problem of insufficient strength caused by the adhesive area being too thin, which cannot meet the mechanical strength requirements, and it can also avoid the problem of abnormal assembly and appearance of the battery module 110 caused by the adhesive area being too thick.

[0151] Optionally, such as Figure 10 As shown, the second battery cell 112 includes a main body 1121, a second electrode output portion 112a, and a stepped portion 1122. The main body 1121 and the second electrode output portion 112a are connected through the stepped portion 1122. It should be noted that although the description here refers to the second battery cell 112, the structure of any battery cell in the battery module 110 can be referenced. Figure 10 The structure of the second battery cell 112 shown.

[0152] Further optional, such as Figure 10 As shown, on the third direction Z, the dimension of the step portion 1122 is H3, the dimension of the main body portion 1121 is H4, and 1 / 3≤H3 / H4≤1.

[0153] In this embodiment, on the third direction Z, the dimensions H3 of the step portion 1122 and H4 of the main body portion 1121 are set to 1 / 3≤H3 / H4≤1. After extensive experimental verification by the applicant, when the ratio of H3 / H4 is within the above range, structural weak points caused by uneven coverage of structural adhesive 170 due to the large height difference between the step portion 1122 and the main body portion 1121 can be avoided.

[0154] Optionally, such as Figure 10 As shown, in the first direction X, the dimension of the step portion 1122 is L2, and the dimension of the structural adhesive 170 covering the step portion 1122 is L1, 1 / 3≤L1 / L2≤1.

[0155] Alternatively, L1 here can be the maximum dimension of the step portion 1122 covered by structural adhesive 170 in the first direction X.

[0156] In this embodiment, in the first direction X, the size L2 of the step portion 1122 and the size L1 of the structural adhesive 170 covering the step portion 1122 are set to 1 / 3≤L1 / L2≤1. After extensive experimental verification by the applicant, when the ratio of L1 / L2 is within the above range, it can avoid the problem of insufficient adhesive to meet the rigidity requirements, and it can also avoid the problem of excessive adhesive overflowing to the main body portion 1121, which would lead to local stress concentration in the battery cell.

[0157] Optionally, the structural adhesive 170 may cover a portion of the upper surface and a portion of the lower surface of the battery module 110. For example, as Figure 10 As shown, structural adhesive 170 covers portions of the upper surface 1103 and the lower surface 1104 of the battery module 110.

[0158] In this embodiment, structural adhesive 170 covers part of the upper surface and part of the lower surface of the battery module 110, forming a riveting structure with the battery module 110, making the connection between the battery module 110 and the bracket 120 more stable.

[0159] Figure 11 for Figure 3 The front view of battery 100 shown. Figure 12 for Figure 3 A top view of the battery 100 is shown. Alternatively, as... Figure 11 As shown, in the third direction Z, the bracket 120 has a dimension of H5, and the battery module 110 has a dimension of H1, where H5 is larger than H1. Optionally, H1 can be the maximum dimension of the battery module 110 in the third direction Z. Optionally, as... Figure 12 As shown, in the second direction Y, the bracket 120 has a size of W1, and the battery module 110 has a size of W2, where W1 is larger than W2. Optionally, W2 can be the maximum size of the battery module 110 in the second direction Y.

[0160] In this embodiment, in the third direction Z, the size H5 of the bracket 120 is set to be larger than the size H1 of the battery module 110, and in the second direction Y, the size W1 of the bracket 120 is set to be larger than the size W2 of the battery module 110. When the battery 100 is subjected to vibration and impact, the bracket 120 will contact the casing first, playing a buffering role and reducing damage to the battery cells.

[0161] Optionally, such as Figure 6 As shown, a first receiving groove 12313 extending along the second direction Y is provided on the first support wall 1231. The first receiving groove 12313 accommodates a first sampling terminal, which is used to collect parameters of the first battery cell 111 and / or the second battery cell 112.

[0162] Optionally, the first sampling terminal can be a temperature sensor, such as a negative temperature coefficient (NTC) temperature sensor. The first sampling terminal can also be a voltage sensor, a current detector, etc. This application embodiment does not limit the type of the first sampling terminal.

[0163] In this embodiment, by providing a first receiving groove 12313 on the first support wall 1231 to accommodate the first sampling terminal, real-time monitoring of the first battery cell 111 and / or the second battery cell 112 can be realized, thereby improving the safety of the battery 100.

[0164] Furthermore, the first receiving groove 12313 can also be used to receive structural adhesive 170 to fix the first sampling terminal and the bracket 120.

[0165] In this embodiment, the first sampling terminal and the bracket 120 are fixedly connected by structural adhesive 170, which can prevent the first sampling terminal from shaking and thus improve the sampling accuracy of the first sampling terminal.

[0166] Similarly, a second receiving groove extending along the second direction Y is provided on the second support wall 1232. The second receiving groove is used to support the second sampling terminal, which is used to collect parameters of the third battery cell 113 and / or the fourth battery cell 114.

[0167] Optionally, the second sampling terminal can be a temperature sensor, such as an NTC temperature sensor. The second sampling terminal can also be a voltage sensor, a current detector, etc. This application embodiment does not limit the type of the second sampling terminal.

[0168] In this embodiment, by providing a second receiving groove on the second support wall 1232 to accommodate the second sampling terminal, real-time monitoring of the third battery cell 113 and / or the fourth battery cell 114 can be achieved, thereby improving the safety of the battery 100.

[0169] Furthermore, the second receiving groove can also be used to receive structural adhesive 170 to fix the second sampling terminal and the bracket 120.

[0170] In this embodiment, the second sampling terminal and the bracket 120 are fixedly connected by structural adhesive 170, which can prevent the second sampling terminal from shaking and thus improve the sampling accuracy of the second sampling terminal.

[0171] Optionally, in this embodiment, the second fixing member 125 and the first fixing member 124 are symmetrically arranged relative to the bracket body 123 on the third direction Z. Symmetrical arrangement may mean that the second fixing member 125 and the first fixing member 124 have completely identical structures and symmetrical positions, or it may simply mean that the second fixing member 125 and the first fixing member 124 are symmetrical in position but not completely identical in structure.

[0172] In this embodiment, the second fixing member 125 and the first fixing member 124 are symmetrically arranged relative to the bracket body 123, which can reduce the production difficulty of the bracket 120.

[0173] Optionally, the structural adhesive 170 in this embodiment may be made of epoxy resin, polyurethane, acrylate, silicone, polyester resin and its derivatives or modified thereof, or one or more of these materials. After curing, the structural adhesive should be non-sticky, or some fiber or particle reinforcing phases may be added inside the structural adhesive, such as inorganic particles, carbon fibers or carbon nanotubes.

[0174] Figure 13 A schematic exploded view of a battery 100 according to an embodiment of this application is shown. Figure 13 As shown, the battery 100 also includes a housing 140 for accommodating the battery module 110 and the bracket 120.

[0175] In one embodiment, the housing 140 may be a metal housing, for example, an aluminum housing. In this case, the support 120 is an insulating support to prevent the electrode output portions between the battery cells in the battery module 110 from contacting the housing 140, thereby improving the safety of the battery 100.

[0176] Optionally, bracket 120 is a plastic bracket.

[0177] In another embodiment, the housing can be an insulating housing; for example, housing 140 is a plastic housing. In this case, the bracket 120 can be a bracket of any material.

[0178] In this embodiment, the battery module 110 and the bracket 120 are disposed inside the housing 140, which can reduce the risk of damage to individual battery cells when the battery 100 is subjected to vibration and impact.

[0179] See also Figure 13The housing 140 has an opening, and the battery 100 also includes an end cap that closes the opening to encapsulate the battery module 110 and the bracket 120 within the housing 140. It should be noted that the number and location of the openings are not limited in this embodiment. For example, the housing 140 may have one opening, which can be positioned in any direction; correspondingly, the battery 100 includes one end cap. As another example, the housing 140 may have two openings, which can be positioned opposite each other in any direction; correspondingly, the battery 100 includes two end caps.

[0180] Furthermore, the end cap is also provided with a positive electrode terminal and a negative electrode terminal. The positive electrode terminal is electrically connected to the positive output part of the battery module 110, and the negative electrode terminal is electrically connected to the negative output part of the battery module 110.

[0181] like Figure 13 As shown, the housing 140 includes a first opening 141 and a second opening 142 disposed along a first direction X. The battery 100 further includes a first end cover 151 and a second end cover 152. The first end cover 151 covers the first opening 141, and the second end cover 152 covers the second opening 142. The positive electrode output section 1101 of the battery module 110 is electrically connected to the positive electrode terminal 161, and the negative electrode output section 1102 is electrically connected to the negative electrode terminal 162. The positive electrode terminal 161 and the negative electrode terminal 162 are disposed in the same end cover of the two end covers. For example, the positive electrode terminal 161 and the negative electrode terminal 162 are both disposed on the first end cover 151.

[0182] In other words, the positive output section 1101 and the negative output section 1102 of the battery module 110 are located at the same end of the battery module 110 along the first direction X.

[0183] One embodiment of this application also provides an electrical device, which may include the battery 100 from the foregoing various embodiments for providing electrical power to the device. Optionally, the electrical device may be a vehicle, a ship, or a spacecraft.

[0184] By installing the battery 100 of the aforementioned embodiment in the electrical device, and by providing a bracket 120 between the first battery cell 111 and the second battery cell 112, the connected first electrode output 111a and second electrode output 112a are positioned within the first receiving space 121 of the bracket 120. Furthermore, a potting channel 130 is provided on the bracket 120 to introduce structural adhesive 170 between the connected first electrode output 111a and second electrode output 112a and the bracket 120. This allows the connected first electrode output 111a and second electrode output 112a to be fixedly connected to the bracket 120, thereby strengthening the rigidity between the series-connected battery module 110 and the bracket 120. This prevents the connected first electrode output 111a and second electrode output 112a from shaking within the first receiving space 121 of the bracket 120, reduces the risk of tearing, and improves the electrical connection stability of the battery 100.

[0185] This application also provides a method for manufacturing a battery. Optionally, the battery can be the battery 100 described in any of the above embodiments. Figure 14 As shown, the preparation method 300 may include some or all of the following contents.

[0186] S310, the first electrode output portion 111a of the first battery cell 111 and the second electrode output portion 112a of the second battery cell 112 are welded together. The first battery cell 111 and the second battery cell 112 are arranged side by side along the first direction X, where the first direction X is the length direction of the battery 100.

[0187] S320, the welded first electrode output part 111a and second electrode output part 112a are assembled into the first receiving space 121 of the bracket 120 along the second direction Y, where the second direction Y is the width direction of the battery 100.

[0188] S330, structural adhesive 170 is injected from the potting channel 130 on the bracket 120 so that the structural adhesive 170 is introduced between the first electrode output section 111a and the second electrode output section 112a and the bracket 120.

[0189] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery (100), wherein, include: The battery module (110) includes a first battery cell (111) and a second battery cell (112) connected in series along a first direction (X). The first electrode output portion (111a) of the first battery cell (111) and the second electrode output portion (112a) of the second battery cell (112) are electrically connected by welding. The first direction (X) is the length direction of the battery (100). A support (120) is disposed between the first battery cell (111) and the second battery cell (112). The support (120) is provided with a first accommodating space (121) for accommodating the first electrode output section (111a) and the second electrode output section (112a). Structural adhesive (170) is used to fix the first electrode output portion (111a) and the second electrode output portion (112a) to the bracket (120) to enhance the rigidity between the first battery cell (111) and the second battery cell (112) and the bracket (120); The bracket (120) is provided with a potting channel (130) for introducing the structural adhesive (170) between the first electrode output section (111a) and the second electrode output section (112a) and the bracket (120); The bracket (120) includes a bracket body (123) and a first fixing member (124), the bracket body (123) having a cavity (1233); The glue channel (130) includes a first glue injection hole (131), which is disposed on the first fixing member (124); The potting channel (130) further includes a second injection hole (132), which is disposed on the bracket body (123). The second injection hole (132) is used to introduce the structural adhesive (170) between at least one battery cell and the bracket. Any battery cell in the battery module (110) includes a main body (1121), an electrode output part, and a stepped part (1122). The main body (1121) and the electrode output part are connected through the stepped part (1122). In the first direction (X), the size of the step portion (1122) is L2, and the size of the structural adhesive (170) covering the step portion (1122) is L1, where 1 / 3 ≤ L1 / L2 ≤ 1.

2. The battery (100) according to claim 1, characterized in that, The first fixing member (124) and the bracket body (123) are stacked in a third direction (Z), where the third direction (Z) is the thickness direction of the battery (100); The first accommodating space (121) is formed between the bracket body (123) and the first fixing member (124).

3. The battery (100) according to claim 1, wherein, The first fastener (124) includes a first wall (1241) and two first side walls (1242). The first wall (1241) is disposed opposite to the bracket body (123). The two first side walls (1242) extend from the two ends of the first wall (1241) in the first direction (X) toward the bracket body (123). The first glue injection hole (131) is disposed on the first wall (1241).

4. The battery (100) according to claim 2, wherein, The battery module (110) also includes: A third battery cell (113) and a fourth battery cell (114) are connected in series along the first direction (X). The third electrode output section (113a) of the third battery cell (113) and the fourth electrode output section (114a) of the fourth battery cell (114) are electrically connected. The third battery cell (113) and the first battery cell (111) are stacked along the third direction (Z). The fourth battery cell (114) and the second battery cell (112) are stacked along the third direction (Z).

5. The battery (100) according to claim 4, wherein, The support (120) also includes: The second fastener (125) is stacked with the bracket body (123) in a third direction (Z). The bracket body (123) is disposed between the first fastener (124) and the second fastener (125), and a second receiving space (122) is formed between the bracket body (123) and the second fastener (125). The structural adhesive (170) is also used to fix the third electrode output part (113a) and the fourth electrode output part (114a) to the bracket (120), and the potting channel (130) is also used to introduce the structural adhesive (170) between the third electrode output part (113a) and the fourth electrode output part (114a) and the bracket (120).

6. The battery (100) according to claim 5, wherein, The second injection hole (132) is used to introduce the structural adhesive (170) into at least one of the first battery cell (111), the second battery cell (112), the third battery cell (113) and the fourth battery cell (114) between the support body (123) and the support body (123) to fix the at least one battery cell to the support (120).

7. The battery (100) according to claim 4, wherein, The cavity (1233) includes two connecting arms (12331) distributed along the first direction (X) and two support walls (12332) distributed along the third direction (Z). The second injection hole (132) is disposed on at least one of the two connecting arms (12331) and at least one of the two support walls (12332).

8. The battery (100) according to claim 7, wherein, The second injection hole (132) is provided on the two connecting arms (12331) and the two support walls (12332).

9. The battery (100) according to claim 8, wherein, The second injection hole (132) is also used to introduce the structural adhesive (170) between the first battery cell (111) and the third battery cell (113), and between the second battery cell (112) and the fourth battery cell (114).

10. The battery (100) according to claim 1, wherein, In the third direction (Z), the size of the battery module (110) is H1, the size of the area covered by the structural adhesive (170) is H2, 1 / 3≤H2 / H1≤1, and the third direction (Z) is the thickness direction of the battery.

11. The battery (100) according to claim 1, wherein, On the third direction (Z), the dimension of the step portion (1122) is H3, the dimension of the main body portion (1121) is H4, and 1 / 3≤H3 / H4≤1.

12. The battery (100) according to claim 1, wherein, The structural adhesive (170) covers part of the upper surface and part of the lower surface of the battery module (110).

13. The battery (100) according to claim 1, wherein, In the second direction (Y), the size of the bracket (120) is larger than the size of the battery module (110); and / or, in the third direction (Z), the size of the bracket (120) is larger than the size of the battery module (110), the second direction (Y) being the width direction of the battery (100), and the third direction (Z) being the thickness direction of the battery (100).

14. The battery (100) according to claim 3, wherein, A first reinforcing rib (1243) extending from the first wall (1241) toward the support body (123) is provided between the two first side walls (1242).

15. The battery (100) according to claim 14, wherein, The plurality of first reinforcing ribs (1243) are spaced apart along the first direction (X) and / or the second direction (Y); or, the plurality of first reinforcing ribs (1243) are intersected along the first direction (X) and the second direction (Y), the second direction (Y) being the width direction of the battery (100).

16. The battery (100) according to claim 3, wherein, The first wall (1241) is provided with two symmetrical first slot structures (12412), which are used by external assembly equipment to grip the first fastener (124).

17. The battery (100) according to claim 1, wherein, The bracket body (123) includes a first support wall (1231), the first support wall (1231) is provided with a first mounting hole (12311), and the first fastener (124) is provided with a first buckle (12411) extending toward the first support wall (1231) at at least one end in the second direction (Y), the first buckle (12411) is engaged with the first mounting hole (12311), and the second direction (Y) is the width direction of the battery (100).

18. The battery (100) according to claim 17, wherein, The first support wall (1231) is provided with a first stop (12312) at one end in the second direction (Y). The first stop (12312) is used to limit the movement of the first electrode output part (111a) and the second electrode output part (112a) in the second direction (Y).

19. The battery (100) according to claim 17, wherein, The first support wall (1231) is provided with a first receiving groove (12313) extending along the second direction (Y), the first receiving groove (12313) accommodating a first sampling terminal, the first sampling terminal being used to collect parameters of the first battery cell (111) and / or the second battery cell (112).

20. The battery (100) according to claim 5, wherein, On the third direction (Z), the second fixing member (125) and the first fixing member (124) are symmetrically arranged relative to the bracket body (123).

21. The battery (100) according to any one of claims 1 to 20, wherein, The battery (100) also includes: The housing (140) is used to house the battery module (110) and the bracket (120).

22. The battery (100) according to claim 21, wherein, The housing (140) is provided with an opening, and the battery (100) further includes: End cap, which closes the opening to encapsulate the battery module (110) and the bracket (120) within the housing (140); The end cap is provided with a positive electrode terminal (161) and a negative electrode terminal (162). The positive electrode terminal (161) is electrically connected to the positive output part (1101) of the battery module (110), and the negative electrode terminal (162) is electrically connected to the negative output part (1102) of the battery module (110).

23. An electrical appliance, wherein, Includes a battery (100) as described in any one of claims 1 to 22, the battery being used to provide electrical energy to the electrical device.

24. A method for preparing a battery (100), wherein, include: The first electrode output portion (111a) of the first battery cell (111) and the second electrode output portion (112a) of the second battery cell (112) are welded together. The first battery cell (111) and the second battery cell (112) are arranged side by side along a first direction (X), where the first direction (X) is the length direction of the battery (100). The welded first electrode output portion (111a) and second electrode output portion (112a) are assembled into the first receiving space of the bracket (120) along the second direction (Y), where the second direction (Y) is the width direction of the battery (100); Structural adhesive (170) is injected through the potting channel (130) on the bracket (120) so that the structural adhesive (170) is introduced between the first electrode output section (111a) and the second electrode output section (112a) and the bracket (120) to enhance the rigidity between the first battery cell (111) and the second battery cell (112) and the bracket (120); The bracket (120) includes a bracket body (123) and a first fixing member (124), and the bracket body (123) has a cavity (1233). The glue channel (130) includes a first glue injection hole (131), which is disposed on the first fixing member (124); The glue channel (130) further includes a second glue injection hole (132), which is disposed on the bracket body (123). The second glue injection hole (132) is used to introduce the structural adhesive (170) between at least one battery cell and the bracket. Either the first battery cell (111) and the second battery cell (112) includes a main body (1121), an electrode output part, and a stepped part (1122). The main body (1121) and the electrode output part are connected through the stepped part (1122). In the first direction (X), the size of the step portion (1122) is L2, and the size of the structural adhesive (170) covering the step portion (1122) is L1, where 1 / 3 ≤ L1 / L2 ≤ 1.

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