WO2023134425A1

WO2023134425A1 - Battery module, battery structure, and electronic device

Info

Publication number: WO2023134425A1
Application number: PCT/CN2022/141365
Authority: WO
Inventors: 曾智敏; 杨海奇; 黄小腾; 唐彧; 徐晨怡; 王鹏
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-01-13
Filing date: 2022-12-23
Publication date: 2023-07-20
Also published as: CN217641586U

Abstract

A battery module, a battery structure, and an electronic device. The battery module (1) comprises a plurality of battery cells (1104) arranged in a first direction; each battery cell (1104) comprises a top portion (110), the top portion (110) being located at one end of the battery cell (1104) in a second direction, and the second direction being perpendicular to the first direction; and at least one mounting space (S1) is present in the first direction between at least two battery cells (1104) that are adjacent in the first direction, the mounting space (S1) being used for mounting an impact bearing member (2) to protect the top portions (110) of the battery cells (1104).

Description

Battery module, battery structure and electronic equipment

Cross References to Related Applications

This application is based on the Chinese patent application with the application number: 202220089505.X, the application date is January 13, 2022, and the application name is "Battery Module, Battery Structure and Electronic Equipment", and claims the priority of the Chinese patent application , the entire content of this Chinese patent application is hereby incorporated into this application as a reference.

technical field

This application relates to battery modules, battery structures and electronic equipment.

Background technique

As one of the structures of the battery module, the flat-lying battery module has the advantage of high safety in theory. The principle is that when the battery thermal runaway occurs, the hot air and flames released by the battery will erupt upwards, and the battery module will The structure of the group is set as a flat battery module, which can delay the thermal air flow and the upward eruption of the flame.

For the flat battery module and its battery structure, there are also reliability problems, especially the reliability after a collision.

Contents of the invention

In view of the problems existing in the background technology, the purpose of this application is to provide a battery module, battery structure and electronic equipment, so as to improve the reliability of the battery module, battery structure and electronic equipment.

In a first aspect, the present application provides a battery module. The battery module includes a plurality of battery cells arranged along a first direction, and the battery cells include a top, and the top is located on the second side of the battery cell. One end of the direction, the second direction is perpendicular to the first direction; wherein at least two adjacent cells in the first direction have at least one installation space in the first direction , wherein the installation space is used for installing an impact bearing to protect the top of the cell.

In the technical solution of the embodiment of the present application, through the setting of the installation space of the adjacent battery cells, the impact bearing is installed. For the flat battery module, the battery structure can withstand the side impact of the battery structure through the impact bearing. impact, and prevent the top of the cell or the busbar of the battery module from being collided and squeezed, which improves the reliability of the battery module, battery structure, and electronic equipment.

In some embodiments, installation parts are provided in the installation space, and the installation parts are respectively connected to the two sides of the installation space on the opposite sides of the first direction. The electric core is fixedly connected, and the mounting part also has a mounting area for mounting the shock bearing part. The installation of the installation part can make the installation of the impact bearing part in the installation space more stable.

In some embodiments, the shoulder areas of the top of the battery cells on both sides of the installation space in the first direction are impact-bearing areas for being covered by the impact-bearing member. The shoulder area is set as an impact-bearing area, so that the battery cells can withstand greater pressure, further improving the reliability of the battery module.

In a second aspect, the present application provides a battery structure, which includes the battery module as described in the first aspect; an impact bearing; and a box, the side walls of the box define a placement space; wherein, the The battery module is located in the placement space, the top of the battery cell is arranged corresponding to the side wall of the box, and the impact bearing is installed in the installation space of the battery module.

In some embodiments, the impact bearing member includes a beam portion and end wall portions connected to both ends of the beam, the beam portion is installed in the installation space, and the end wall portion covers the top of the cell . The impact bearing part includes the structure of the end wall and the beam, which makes the overall rigidity of the battery structure better and the ability to withstand side impact is stronger.

In some embodiments, the battery module is the battery module described in the part of the first aspect, the beam part includes a mounting hole, and the installation of the beam part and the mounting part The area is installed through the installation hole and the corresponding connection piece, and the connection piece is embedded in the installation hole. The structure in which the beam part and the mounting part are fastened and installed improves the rigidity of the battery module of the battery structure.

In some embodiments, the end wall portion includes a first portion extending from both ends of the beam portion along the extending direction of the beam portion, the cross-sectional area of the first portion is larger than the cross-sectional area of the beam portion, so The force bearing area of the impact bearing part can be increased, so that the force transmission is more stable.

In some embodiments, the end wall part further includes a second part extending from the first part along the height direction of the top of the battery core, so that the bearing capacity of the impact bearing part can be further improved, and better Protect the battery pack.

In some embodiments, the side wall of the box body has an installation groove, the depth of the installation groove matches the thickness of the end wall part, one side of the end wall part is connected to the top of the battery core, and the other side is connected to the top of the battery core. One side is connected to the installation groove. In this way, the impact bearing can be positioned along the installation groove during assembly, and even if the side wall of the box of the battery structure collides, the fitting connection between the installation groove and the end wall can ensure the relative position of the impact bearing and the box Stable to avoid relative slippage between the two.

In some embodiments, the other side of the end wall portion includes a first inclined portion, the installation groove includes a second inclined portion, and the first inclined portion abuts against the second inclined portion. The inclined plane fit structure can play a guiding role, and the fit structure is more stable.

In some embodiments, there is structural glue filling between the installation groove and the end wall, which further improves the structural strength.

In some embodiments, the shock bearing part and the cells on both sides of the installation space in the first direction are filled with structural glue, so that the connection between the shock carrier and the cells is tighter, further improving the The stiffness of the battery module in the battery structure.

In some embodiments, the battery structure further includes an upper cover, which is disposed on the placement space defined by the side wall of the box, and the upper cover is connected to the battery module through structural glue. Through the structural glue of the upper cover and the battery module assembly, the gap between the impact bearing part, the battery module and the box can be filled, and the overall strength of the battery structure can be further improved.

In a third aspect, the present application provides an electronic device, which includes the battery module assembly as described in the second aspect.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also, the same reference numerals are used to denote the same components throughout the drawings. In the attached picture:

FIG. 1 is an exploded schematic diagram of a battery structure according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a case of a battery structure according to an embodiment of the present application.

FIG. 3 is a schematic diagram of an impact bearing member of a battery structure according to an embodiment of the present application.

Reference signs:

10-battery structure;

1-battery module, 11, 1101, 1102, 1103, 1104-cell, 110-top, 111-top cover, 112-explosion-proof valve, 113-pole, S1-installation space, 12-installation piece, 121, 122-side, 120-installation area, 1201, 1202-connection hole, 114-structural adhesive, 115, 1151, 1152-shoulder area,

2-shock bearing, 21-beam part, 201, 202-installation hole, 211-one end face, 212-the other end face, 22-end wall part, 221-first part, 222-second part, 2201-one Side, 2202-the other side, 22021-the first slope;

3-box body, 31-side wall, 311-installation groove, 3111-second slope, S2-placement space;

4-top cover;

501, 502-connectors.

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to To limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the description of the above drawings are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specificity, or specificity of the indicated technical features. Sequence or primary-secondary relationship. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces).

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the drawings Orientation or positional relationship is only for the convenience of describing the embodiment of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as an implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

The inventors of the present application found that one of the main reasons for the reliability problems of the flat-lying battery module and the battery structure formed by it is that, since the battery cells are placed flat, after the battery structure is squeezed or bumped from the side, the battery The top cover, pole, explosion-proof valve on the top of the core, and the high-voltage busbar (Busbar) of the battery module are likely to be stressed. After collapse, the first part to be stressed is the top cover, pole, explosion-proof valve and the busbar of the battery module, which may cause secondary thermal runaway risks.

In order to increase the reliability of the flat-lying battery module and its battery structure and improve the reliability of electronic equipment, the inventor has designed a battery module and battery structure after in-depth research. The battery structure can be loaded by impact The parts can bear the impact of the battery structure by the side impact, and avoid the top of the battery cell or the busbar of the battery module from being impacted and squeezed, which improves the reliability of the battery module, battery structure and electronic equipment.

The battery modules and battery structures disclosed in the embodiments of the present application can be used, but not limited, in electronic equipment such as vehicles, ships, or aircraft. The power supply system of the electronic device can be composed of the battery module and the battery structure disclosed in this application.

An embodiment of the present application provides an electronic device that uses a battery as a power source. The electronic device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric vehicle, a train, a ship, a spacecraft, and the like. Among them, electric vehicles can include pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc., and electric toys can include stationary or mobile electric vehicles. Toys, for example, game consoles, electric car toys, electric boat toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, and the like. Electronic equipment can also be an energy storage system, such as large-scale commercial energy storage, micro-grid energy storage, base station products, household uninterruptible power supply energy storage, and so on.

According to some embodiments of the present application, referring to FIG. 1 , the present application provides a battery module 1, including a plurality of battery cells 11 arranged along a first direction, the battery cells 11 include a top 110, and the top 110 is located on the 11 at one end of the second direction, the second direction being perpendicular to the first direction. Wherein, between at least two adjacent electric cores 11 in the first direction, there is at least one installation space S1 in the first direction, and the installation space S1 is used for installing the shock bearing member 2 to protect the top of the electric cores 11 110.

The first direction and the second direction, such as shown in FIG. 1, the first direction is the X direction, the second direction is the Y direction, a plurality of cells 11 are arranged along the X direction, and one end of the cells 11 in the Y direction includes Top 110.

The top 110, as shown in Figure 1, generally includes the top cover 111 of the battery cell 11, the explosion-proof valve 112 and the pole 113 located on the top cover 111, the reason why it is called "top" is a kind of The idiomatic term refers to that if the cell 11 is placed vertically, the explosion-proof valve 112 and the pole 113 of the top cover 111 are located on the top of the cell 11, which corresponds to one end of the Z direction in FIG. For the battery module 1 with the conventional structure, the top 110 is located on the side, that is, one end in the Y direction. It can be understood that the top 110 is not limited to the top cover 111 shown in the figure, and the explosion-proof valve 112 and pole 113 located on the top cover 111 may include more components at this position, or reduce certain components.

Between at least two adjacent battery cells 11 in the first direction, there is at least one installation space S1 in the first direction, which means, for example, as shown in FIG. 1 , for four

battery cells

1101, 1102 . It is connected by structural glue 114. It can be understood that the location of the installation space S1 can be adjusted according to actual needs. For example, according to the simulation or test structure, it is determined that some locations are more likely to be collided or squeezed, and then the installation space is set corresponding to the location. S1, in the embodiment shown in FIG. 1 , the position between the

cells

1101 and 1102 is a position that is more likely to be collided or squeezed, and the position between the

cells

1102 and 1103 and between the

cells

1103 and 1104 The position is less likely to be collided or squeezed, so only the installation space S1 is set here, if the

battery cells

1102, 1103, and/or the position between the

battery cells

1103, 1104 are also likely to be collided or squeezed Similarly, an installation space S1 should be provided between the

battery cells

1102, 1103, and/or between the

battery cells

1103, 1104.

The installation space S1 means the space for correspondingly installing the impact bearing 2 , and the impact bearing 2 needs to protect the top 110 of the battery cell 11 , so not any gap can be called the installation space S1 . For example, as shown in FIG. 1, there is also a tiny gap between the

cells

1102, 1103, and the

cells

1103, 1104, and the gap is filled by the structural adhesive 114, but the structural adhesive 114 does not protect the top 110, but only glues Therefore, in the embodiment shown in FIG. 1 , there is no installation space S1 between the

battery cells

1102 , 1103 , and the

battery cells

1103 , 1104 . Continuing from the above, the “impact” of the impact bearing member 2 should be understood in a broad sense, that is, the load is subject to impact or extrusion force, including instantaneous impact, extrusion force, and other forces acting on the top 110 .

Here, the cell 11 and the battery module 1 are the usual meanings in the field, that is, the cell 11 is the smallest unit constituting the battery module 1 and realizes the conversion of electrical energy and chemical energy. The battery module 1 includes a plurality of battery cells 11 connected in series or in parallel or mixed. The mixed connection refers to a plurality of battery cells 11 that are both connected in series and in parallel. The battery module 1 can also include a busbar (busbar) for realizing multiple The electrical connection between the battery cells 11, for example, may also have a monitoring and management circuit for the battery cells 11, etc. Each battery cell 11 may be a secondary battery or a primary battery, such as a lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, a lithium-sulfur battery, etc., and is not limited thereto. The battery core 11 can be in the form of a cylinder, a flat body, a cuboid or other shapes.

By setting the installation space S1 between at least two adjacent battery cells 11 of the battery module 1 to set the impact bearing 2, the corresponding battery structure can withstand the impact of the battery structure by the side collision through the impact bearing 2, and Prevent the top 110 of the battery cell 11 or the bus bar of the battery module 1 from being collided and squeezed, prevent the above components from being damaged, and improve the reliability of the battery module, battery structure and electronic equipment.

According to some embodiments of the present application, optionally, please continue to refer to FIG. 1 , in the battery module 1, a mounting part 12 is provided in the installation space S1, and the mounting part 12 has two

opposite sides

121, 122 in the first direction. They are respectively fixedly connected to the battery cells 11 on both sides of the installation space S1 in the first direction, and the installation part 12 also has an installation area 120 for installing the impact bearing part 2 .

The meaning of the mounting part 12 is used to install the parts of the impact bearing 2, such as a plate-shaped part, the specific installation method can be as shown in Figure 1, the installation area 120 has connecting

holes

1201, 1202, and the impact bearing 2 There are mounting

holes

201 , 202 , and the connecting holes of the mounting area 120 are connected to the mounting

holes

201 , 202 of the impact bearing 2 through connecting

pieces

501 , 502 such as bolts, so that the impact bearing 2 is mounted on the mounting 12 . In the embodiment shown in FIG. 1 , the two

side surfaces

121 , 122 of the mounting part 12 are respectively fixedly connected to the

battery cells

1101 , 1102 located on both sides of the installation space S1 in the X direction. This not only makes it easy to install the impact bearing 2 in the installation space S1, but also makes the installation of the impact bearing 2 in the installation space S1 more stable.

According to some embodiments of the present application, optionally, the shoulder area 115 of the top 110 of the cell 11 on both sides of the installation space S1 in the first direction is an impact bearing area for being covered by the impact bearing member 2 .

The shoulder area 115 is a visual description, similar to the shoulders of the human body, that is, the area at both ends of the top 110 in the X direction. For example, as shown in FIG. 1, the battery cells 1101 on both sides of the X direction of the installation space S1 The

shoulder areas

1151 and 1152 of the top 110 of , 1102 are impact bearing areas, which are covered by the impact bearing member 2 in the battery structure, so that the battery cell 11 can withstand greater pressure and further improve the reliability of the battery module. The principle is that for the top 110 of the battery cell 11, the ability of each part to withstand force is different. The explosion-proof valve 112 is theoretically not allowed to bear force, and the maximum pressure that the shoulder area 115 can bear is usually the maximum pressure of the battery pole. It can withstand several times of the maximum pressure. For example, the cell 11 shown in the figure, the maximum pressure that the shoulder area 115 can withstand is ≥ 2000N, and the maximum pressure that the pole 113 can withstand is about 500N, so the impact bearing 2 Covering the shoulder area 115, the impact or extrusion force it receives can be transferred to the area with the highest bearing capacity in the top 110 of the battery cell 11, so that the battery cell 11 can withstand greater pressure, and further improve the reliability of the battery module sex.

According to some embodiments of the present application, as shown in FIG. 1 to FIG. 3 , the present application also provides a battery structure 10, which includes the battery module 1 described above, the impact bearing 2, and the box body 3; the box body The side wall 31 of 3 defines a placement space S2, and the battery module 1 is located in the placement space S2. The top 110 of the battery cell 11 is disposed corresponding to the side wall 31 of the box body 3 , and the shock bearing member 2 is installed in the installation space S1 of the battery module 1 .

The battery structure 10 is a structure having a battery module 1 , for example, it may be a term commonly used by those skilled in the art as a "battery pack". For example, as shown in FIG. 1 , the battery structure 10 may include a battery module 1 , and a mechanical part, and the mechanical part may include a case 3 , and other fixing devices, electrical connection devices, insulating parts, and the like. The box body 3 plays the role of accommodating and protecting the battery module 1 . In addition, the battery structure 10 can also include a thermal management system, such as air cooling, liquid cooling, heating devices, and heating films, and a battery management device, such as a battery management system (Battery Management System, BMS). The status of the battery cells 11 is used to determine the status of the entire battery structure 10, and the battery structure 10 is controlled and adjusted according to their status, and the strategy is implemented, so as to realize the charge and discharge management of the battery structure 10 and each battery cell 11 to ensure the battery structure. 10 operates safely and stably. For example, it may also include a safety box (S-box), which is mainly composed of relays, current sensors, pre-charging resistors and fuses, etc., to ensure the reliability and safety of the battery structure 10 . It can be understood that the number of battery modules 1 in the battery structure 10 shown in FIG. Group 1 series or parallel or hybrid.

Adopting the battery structure 10 of the above embodiment, its beneficial effect is as described above, the safety of the flat-lying battery module 1 is higher, and the setting of the impact bearing 2 protects the relatively weak explosion-proof of the top 110 The valve 112, the pole 113, and the bus bar of the battery module prevent the pole 113 of the cell, the explosion-proof valve 112 and the high voltage of the battery module from being damaged when the battery structure 10 is squeezed or collided with the side. The hidden danger of secondary thermal runaway injury after collision.

According to some embodiments of the present application, optionally, as shown in FIG. 1 and FIG. 3 , the impact bearing member 2 includes a beam portion 21 and end wall portions 22 connected to both ends of the beam portion 21, and the beam portion 21 is installed in the installation space. S1 , the end wall portion 22 covers the top 110 of the cell 11 .

The meaning of the beam portion 21 here is a structure that connects two end wall portions 22 respectively located on both sides thereof. For example, as shown in FIG.

End wall portions

22,22. The end wall portion 22 means that it is located at the end side and has a wall structure. The beneficial effect of adopting the above embodiments is that the force can be transmitted stably through the arrangement of the beam portion 21, and the installation space S1 of the beam portion 21 can also improve the rigidity of the battery module 1 as a whole, so that the structure of the battery module 1 It is more stable and has a stronger ability to withstand side impacts.

According to some embodiments of the present application, optionally, as shown in FIG. 1 and FIG. The installation area 120 of the installation part 12 is installed through the installation holes 201 , 202 and the corresponding

connectors

501 , 502 , and the

connectors

501 , 502 are embedded in the installation holes 201 , 202 .

The

connectors

501, 502 can be, for example, screws or bolts, and the mounting

holes

201, 202 can be countersunk structures. The bolt heads of the bolt-shaped

connectors

501, 502 are buried in the mounting

holes

201, 202, so that the battery structure 10 Being more compact can also make it easier for the installation part 12 to be arranged on the battery structure 10 , and there is no need to consider avoiding the

connection parts

501 and 502 in the battery structure 10 to provide additional space. The structure in which the beam portion 21 is fastened to the mounting member 12 improves the rigidity of the battery module 1 of the battery structure 10 .

According to some embodiments of the present application, optionally, continuing to refer to FIG. 1 and FIG. 3 , the end wall portion 22 of the impact bearing member 2 includes a first portion 221 extending from both ends of the beam portion 21 along the extending direction of the beam portion. , the cross-sectional area of the first portion 221 is greater than the cross-sectional area of the beam portion 21 .

The extension direction of the beam portion 21, such as shown in FIG. That is, the first part 221 and the beam part 21 form a structure similar to a "T", and generally speaking, the

first parts

221, 221 at both ends and the beam part 21 form an "I"-shaped structure with large two ends. The beneficial effect of adopting the above embodiment is that, through the structure in which the cross-sectional area of the first part 221 is larger than that of the cross-beam part 21, the force-bearing area with the box body 3 is increased, ensuring that the side wall 31 is subjected to collision and extrusion. Forces can be stably transmitted to the impact carrier 2 .

According to some embodiments of the present application, optionally, continuing to refer to FIG. 1 and FIG. 3 , the end wall portion 22 of the impact bearing member 2 further includes The second part of 222. The height direction of the top 110 of the battery cell 11, such as shown in FIG. Better protection of the battery module 1 is also conducive to a more stable installation of the shock bearing member 2 .

According to some embodiments of the present application, optionally, as shown in Fig. 1 and Fig. 2, the side wall 31 of the box body 3 has a mounting groove 311, the depth of the mounting groove 311 matches the thickness of the end wall portion 22, and the end wall portion One side 2201 of 22 is connected to the top 110 of the cell 11 , and the other side 2202 is connected to the installation groove 311 .

The side wall 31 has a mounting groove 311. For example, as shown in FIG. The depth in the direction accommodates part of the thickness or even the entire thickness of the end wall portion 22, so that the end wall portion 22 is restricted by the groove wall of the installation groove 311 in the X direction, and restricted by the groove bottom of the installation groove 311 in the Y direction.

The beneficial effect of adopting the above embodiments is that by providing the installation groove 311 in the box body 3, the impact bearing 2 can be positioned along the installation groove 311 during assembly, which is easy to assemble, and even if the side of the box body 3 of the battery structure 10 When the wall 31 is collided or squeezed, the matching connection between the installation groove 311 and the end wall portion 22 can also ensure that the relative position of the impact bearing 2 and the box body 3 is stable, avoiding relative slippage between the two, and ensuring that the impact bearing 2 is accurately positioned. Play a protective role in the position that is more likely to be hit or squeezed.

According to some embodiments of the present application, optionally, referring to FIGS. abut against the second inclined portion 3111 . The meaning of "incline" here is the usual meaning in this field, that is, a concept opposite to a plane. Taking Figures 1 to 3 as an example, the side wall 31 of the box body 3 is a plane structure, which is along the Z direction. extending, while the extending direction of the first slope 22021 and the second slope 3111 has a certain inclination relative to the Z direction, so it is a slope structure. The mounting groove 311 and the end wall portion 22 are connected through the inclined surface, so that the guiding and positioning effect provided by the mounting groove 311 on the impact bearing member 2 during assembly is more significant, and the connection and matching structure between the mounting groove 311 and the end wall portion 22 is also more obvious. for stability.

According to some embodiments of the present application, optionally, there is structural glue filling between the installation groove 311 and the end wall portion 22, that is, in the assembly of the battery structure 10, after the installation groove 311 and the end wall portion 22 are plugged and connected, It can be further filled and bonded with structural glue. For example, as shown in FIGS. 1 and 2, the bottom of the installation groove 311 and the end surface of the end wall 22 in the Y direction, that is, the other side 2202 mentioned above, is filled and bonded with structural glue. , and the groove wall of the mounting groove 311 and the end surface of the end wall portion 22 in the X direction are filled and bonded by structural glue, so that the strength of the overall structure composed of the battery module 1 and the impact bearing member 2 can be further improved.

According to some embodiments of the present application, optionally, referring to FIG. 1 , the shock bearing member 2 and the cells on both sides of the installation space S1 in the first direction are filled with structural glue. Taking Fig. 1 as an example, there is an installation space S1 between

adjacent battery cells

1101, 1102 in the X direction to install the impact bearing 2, the

battery cells

1101, 1102 on both sides of the impact bearing 2, and the beam portion 21 at X One end surface 211 in the X direction and the battery cell 1101 are filled and bonded with structural glue, and the beam part 21 is filled and bonded with structural glue between the other end surface 212 in the X direction and the battery cell 1102, so that the impact bearing part 2 and the battery cell 1102 are filled and bonded. The connection structure between the cores 11 is more stable, further improving the rigidity of the battery module 1 .

According to some embodiments of the present application, optionally, referring to FIG. 1 , the battery structure 10 further includes an upper cover 4, which is provided on the placement space S2 defined by the side wall 31 of the box body 3, and the upper cover 4 and the battery module 1 pass through Structural glue connection.

As shown in FIG. 1 , the upper cover 4 may have a flow channel structure, which can provide cooling fluid to flow therein to cool the battery module 1. Similarly, it can also provide hot fluid to flow in the flow channel to Heating the battery module 1, for example, heating the battery module 1 when the temperature is low, so as to minimize the performance degradation of the battery caused by the low temperature. The material, processing technology and structure of the upper cover 4 are aluminum stamped and brazed water-cooled plates, but not limited thereto. For example, they can also be profiled water-cooled plates or inflated water-cooled plates. The "water cooling plate" here is just a common term, and it does not limit the upper cover 4 to only have the function of cooling according to the above. The specific structure of the upper cover 4 , such as the flat plate structure shown in FIG. 1 , is compact and space-saving, but it is not limited thereto.

The process of connecting the upper cover 4 and the battery module 1 through structural glue may be to place the battery module 1 into the box body 3, install the impact bearing 2 in the installation space S1 of the battery module 1, and then the upper cover 4 Fill and bond with the battery module 1 through structural glue, and during this process, the structural glue will also be filled between the impact bearing part 2 and the battery module 1, for example, as described above, the crossbeam part 21 in the X direction One end surface 211 and the battery cell 1101 are filled and bonded with structural glue, and the other end surface 212 of the beam portion 21 in the X direction is filled and bonded with the battery cell 1102 through structural glue; the structural glue will also be filled to the impact bearing and Between the boxes, for example, as described above, the groove bottom of the installation groove 311 and the end surface in the Y direction of the end wall portion 22, that is, the other side 2202 mentioned above, are filled and bonded by structural adhesive, and the groove wall and the end surface of the installation groove 311 The end surface of the wall portion 22 in the X direction is filled and bonded with structural glue.

The beneficial effect of adopting the above embodiments is that the battery structure 10 has a compact structure, can effectively cool or heat the battery module 1, and the glue structure between the upper cover 4 and the battery module 1 can fill the structure, and can also make the impact bearing 2 is bonded with the battery module 1 and the box body 3, further improving the overall strength of the battery structure 10.

According to some embodiments of the present application, the present application also provides an electronic device including the battery structure 10 introduced above.

Electronic devices include but are not limited to the above-mentioned mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, trains, ships, spacecraft, etc. Among them, electric vehicles can include pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc., and electric toys can include stationary or mobile electric vehicles. Toys, for example, game consoles, electric car toys, electric boat toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, and the like. Electronic equipment can also be an energy storage system, such as large-scale commercial energy storage, micro-grid energy storage, base station products, household uninterruptible power supply energy storage, and so on.

According to an embodiment of the present application, referring to FIGS. 1 to 3 , the present application provides a battery structure 10 , which includes a flat battery module 1 , an impact bearing 2 , a box body 3 and an upper cover 4 . The flat battery module 1 includes a plurality of battery cells 11 arranged along the X direction, and at least two

adjacent battery cells

1101 and 1102 of the battery module 1 have an installation space S1 in the X direction. The impact bearing 2 includes a beam portion 21 and end wall portions 22 connected to both ends of the beam portion 21 in the Y direction. During assembly, the battery module 1 is placed in the placement space S2 defined by the side wall 31 of the box body 3, the end wall portion 22 of the impact bearing 2 is installed and positioned with the installation groove 311 of the box body 3, and the beam portion 21 is fixedly installed on the Install the space S1, and finally fill and bond the upper cover 4 and the battery module 1 with structural adhesive. At the same time, the structural adhesive also flows and fills to the connection area between the impact bearing part 2, the battery module, and the box body 3, which further improves the overall strength. With such a battery structure, when the side wall of the box body 3 is collided or squeezed, the external force is borne by the impact bearing member 2, thereby preventing structures such as the top 110 of the battery cell 11 or the high-voltage bus bar of the battery module 1 from being collided and squeezed. pressure, to avoid damage to the pole 113 of the battery cell, the explosion-proof valve 112 and the high voltage of the battery module, and cause the hidden danger of secondary thermal runaway damage after the collision. Reliability of Electronic Devices of Structure 10.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A battery module, wherein the battery module includes a plurality of battery cells arranged along a first direction, the battery cells include a top, the top is located at one end of the battery cells in the second direction, the The second direction is perpendicular to the first direction; wherein at least two adjacent cells in the first direction have at least one installation space in the first direction, wherein the The installation space is used to install an impact bearing to protect the top of the cell.
The battery module according to claim 1, wherein mounting pieces are provided in the installation space, and the two sides of the mounting pieces opposite to the first direction are respectively connected to the first in the installation space. The battery cells on both sides of the direction are fixedly connected, and the mounting part also has a mounting area for mounting the shock bearing part.
The battery module according to claim 1 or 2, wherein the shoulder areas of the top of the battery cells on both sides of the installation space in the first direction are impact-bearing areas for being impacted by the impact Carrier covers.
A battery structure, including:

The battery module according to any one of claims 1-3;

impact bearings; and

A box body, the side walls of the box body define a placement space;

Wherein, the battery module is located in the placement space, the top of the battery cell is arranged corresponding to the side wall of the box, and the impact bearing member is installed in the installation space of the battery module.
The battery structure according to claim 4, wherein the impact bearing member comprises a beam portion and end wall portions connected to both ends of the beam portion, the beam portion is installed in the installation space, and the end wall portion covers on the top of the cell.
The battery structure according to claim 5, wherein the battery module is the battery module according to claim 2 or 3, the beam part includes a mounting hole, and the beam part and the mounting part The installation area is installed through the installation hole and the corresponding connecting piece, and the connecting piece is buried in the installation hole.
The battery structure according to claim 5 or 6, wherein the end wall portion includes a first portion extending from both ends of the beam portion along the extending direction of the beam portion, and the cross-sectional area of the first portion is larger than the The cross-sectional area of the beam portion.
The battery structure according to any one of claims 5-7, wherein the end wall portion further includes a second portion extending from the first portion along a height direction of the top of the battery cell.
The battery structure according to any one of claims 5-8, wherein the side wall of the box body has a mounting groove, the depth of the mounting groove matches the thickness of the end wall portion, and the thickness of the end wall portion One side is connected to the top of the battery core, and the other side is connected to the installation groove.
The battery structure according to claim 9, wherein the other side of the end wall portion includes a first slope, the mounting groove includes a second slope, and the first slope abuts against the second Bevel.
The battery structure according to claim 9 or 10, wherein the gap between the installation groove and the end wall is filled with structural glue.
The battery structure according to claims 4-11, wherein the shock bearing member and the battery cells on both sides of the installation space in the first direction are filled with structural glue.
The battery structure according to any one of claims 4-12, wherein the battery structure further comprises an upper cover, which is arranged on the placement space defined by the side wall of the box, and the upper cover and the battery The modules are connected by structural glue.
An electronic device, comprising the battery structure according to any one of claims 4-13.