Battery module, battery and electric device

Abstract

The utility model discloses a battery module, a battery and an electric device. The battery module comprises two rows of battery packs arranged along a first direction, each row of battery packs comprises a plurality of battery monomers arranged along a second direction, and each battery monomer comprises a shell; the end plates are arranged at two ends of the two rows of battery packs along the second direction; and the connecting piece extends along the second direction and is arranged on one side of the battery pack along the third direction, the first direction, the second direction and the third direction are vertical in pairs, and the plurality of shells in each row of battery packs are connected with the connecting piece. According to the technical scheme, the connecting pieces can connect the shells of the two rows of battery packs together, connect the shells of a plurality of battery monomers in the battery packs together, and cooperate with the end plates to fix the battery module into a whole, so that the overall rigidity of the battery module is effectively improved, the dominant frequency of the battery is further improved, and the service life of the battery module is prolonged. The mechanical properties such as vibration impact of the battery are improved, and the cracking failure risk of parts and a connecting structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module, a battery and an electrical device. Background Art

[0002] In the related art, under the condition of battery vibration and impact, the shell, tabs, box welds, mounting brackets and other structural parts of the battery cell are prone to cracking and failure, resulting in unqualified battery products or reduced battery service life. Utility Model Content

[0003] The embodiments of the utility model provide a battery module, a battery and an electrical device, which improve the mechanical properties of the battery such as vibration and impact.

[0004] In a first aspect, an embodiment of the utility model provides a battery module, comprising: two rows of battery packs, the two rows of battery packs are arranged along a first direction, each row of the battery packs comprises a plurality of battery cells arranged along a second direction, the battery cells comprise a shell; an end plate, disposed at both ends of the two rows of battery packs along the second direction; a connector, the connector extending along the second direction, the connector being disposed on one side of the two rows of battery packs along a third direction, the first direction, the second direction and the third direction being perpendicular to each other, and a plurality of the shells in each row of the battery packs are connected to the connector.

[0005] In the above technical solution, multiple shells in each row of battery packs are connected to the connector, so that the connector can connect the shells of two rows of battery packs together, connect the shells of multiple battery cells in the battery pack together, and cooperate with the end plate to fix the battery module into a whole, thereby effectively improving the overall stiffness of the battery module, thereby increasing the battery main frequency, improving the battery's mechanical properties such as vibration and impact, and reducing the risk of cracking and failure of parts and connection structures.

[0006] In some embodiments, the number of the shells connected to the connector in each row of the battery pack is not less than half the number of battery cells included in the battery pack.

[0007] In the above technical solution, the effect of the connector in fixing the battery module into a whole can be further improved, and the effect of improving the mechanical performance can be better.

[0008] In some embodiments, the plurality of battery cells of the battery pack include a first battery cell and a second battery cell, the first battery cells of two rows of the battery pack are electrically connected via a first electrical connector, and the second battery cells of two rows of the battery pack are both connected to the connector.

[0009] In the above technical solution, the connecting member is connected to the shell of the second battery cell instead of the shell of the first battery cell, so that the first electrical connecting member connected to the first battery cell is not easy to interfere with the connecting member, and the two can be staggered along the second direction, and the structural design is more reasonable.

[0010] In some embodiments, the battery module further includes a buffer, wherein the buffer is disposed between two adjacent battery cells of the same battery pack; and / or the buffer is disposed between two adjacent rows of battery packs.

[0011] In the above technical solution, the buffering of the buffer member can reduce the damage of the external impact force to the battery cell, limit the expansion of the battery cell, and improve the performance of the battery cell.

[0012] In some embodiments, the battery cell includes an electrical connection portion, the electrical connection portion is disposed on one side of the housing along the third direction, and the connector is located between the electrical connection portions of two adjacent rows of battery packs.

[0013] In the above technical solution, the connector and the electrical connection part are located on the same side of the shell along the third direction, occupying the space on the same side of the shell along the third direction, which is conducive to reducing the overall space occupied by the battery module along the third direction and making the structure more compact. In addition, in the first direction and the second direction, the connector and the electrical connection part will not interfere with each other, and the connector can be connected to the shells of two rows of battery packs, and the position arrangement is more reasonable.

[0014] In some embodiments, the connector is connected to the shell by adhesive.

[0015] In the above technical solution, the adhesive connection method is simple, there is no need to make a complex design on the structure of the connecting piece, there is no need to change the structure of the shell, and the connection is firm and reliable.

[0016] In some embodiments, the battery module further includes a shielding member, which is disposed between the shell and the connecting member, and a gap between two adjacent shells is opposite to the shielding member along the third direction, and the adhesive is staggered perpendicular to the third direction.

[0017] In the above technical solution, the adhesive can contact the shell and the connector without being separated by the shielding member, thereby achieving reliable bonding between the shell and the connector. In addition, the shielding member can block the gap between two adjacent shells, making it difficult for the adhesive to overflow between the two adjacent shells, thereby increasing the amount of adhesive between the shell and the connector and thus improving the bonding reliability.

[0018] In some embodiments, the battery module also includes a collection component, which includes an isolation plate and a collection body, the isolation plate is arranged between the collection body and the shell, the isolation plate is provided with a plurality of avoidance holes passing through along the third direction, the adhesive is located in the avoidance holes and connects the connecting member and the shell, and the portion of the isolation plate located between two adjacent avoidance holes forms the shielding member.

[0019] In the above technical solution, a part of the isolation plate is formed as a shielding member, and there is no need to separately set up a component for shielding, and there is no need to separately install and fix the shielding member. For example, the installation of the shielding member can be achieved by installing the isolation plate, simplifying the structure between the connecting member and the shell, making the structure compact, easy to bond, and not prone to glue overflow.

[0020] In some embodiments, in the arrangement direction of two adjacent battery cells, the size of the shielding member is greater than the distance between the shells of the two battery cells.

[0021] In the above technical solution, the shielding member can better shield the gap between two adjacent battery cells, and has a better effect of preventing the adhesive from overflowing into the space between the shells of the two battery cells.

[0022] In some embodiments, the shielding member includes a first shielding member and a second shielding member, the gap between two rows of battery packs is opposite to the first shielding member along the third direction, and the gap between two adjacent shells of the same battery pack is opposite to the second shielding member along the third direction.

[0023] In the above technical solution, the first shielding member and the second shielding member can respectively shield the gap formed between the battery packs and the gap within the battery pack, thereby better preventing the adhesive from overflowing into the gap.

[0024] In some embodiments, a reinforcing rib is provided on a side of the connecting member facing away from the shell.

[0025] In the above technical solution, the structural strength of the connector can be improved by setting reinforcing ribs, thereby further improving the connection strength of the connector to the multiple battery cells in the two rows of battery packs, improving the integrity of the battery module, and being more conducive to reducing the battery main frequency and improving the mechanical properties of the battery such as vibration and impact.

[0026] In some embodiments, the connecting member is provided with a plurality of the reinforcing ribs, the plurality of the reinforcing ribs are arranged at intervals along the first direction, and the reinforcing ribs extend along the second direction.

[0027] In the above technical solution, the reinforcing ribs extend along the second direction, which is more conducive to improving the ability of the connector to withstand the expansion force along the second direction, and the effect of improving the strength of the connector is better. In addition, the plurality of reinforcing ribs are arranged at intervals along the first direction, which can strengthen the connector from different positions in the first direction, so that the strength improvement effect of different areas of the connector is more uniform.

[0028] In some embodiments, the connector includes a reinforcement layer and an insulating layer wrapped around the reinforcement layer, the insulating layer is connected to the shell, and the strength of the reinforcement layer is greater than the strength of the insulating layer.

[0029] In the above technical solution, the insulating layer is coated on the outside of the reinforcement layer and the insulating layer is connected to the shell, so that the insulating layer can separate the reinforcement layer from the shell, the electrical connection part, the electrical connector and other structures. In the embodiment where the reinforcement layer is a metal part, the risk of short circuit in the battery module caused by the reinforcement layer being charged can be avoided. The strength of the reinforcement layer is greater than that of the insulating layer, which is conducive to improving the overall strength of the connector, thereby improving the effect of the connector connecting the two rows of battery packs into a whole, and the effect of reducing the main frequency of the battery is better, and it is conducive to improving the effect of restraining the expansion force of the battery cell.

[0030] In some embodiments, a reinforcing member is provided on a side of the connecting member facing away from the shell, and the reinforcing member is connected to the end plates at both ends of the battery pack along the second direction.

[0031] In the above technical solution, the two end plates are connected by a reinforcement piece, which can improve the stability of the two end plates in limiting the multiple battery cells in the middle, better withstand the expansion force of the battery cells, and reduce the risk of battery expansion force failure.

[0032] In some embodiments, both ends of the connecting member along the second direction are spaced apart from the end plate.

[0033] In the above technical solution, the arrangement of the connector is not interfered by the two end plates, so that the connector is easier to process and install, and is conducive to achieving the avoidance of the connector and structures such as the electrical connector.

[0034] In some embodiments, two ends of the connecting member along the second direction are respectively connected to the end plates.

[0035] In the above technical solution, by connecting the two end plates through a connector, the two end plates and the multiple battery cells in the middle can be further connected into a whole, which has a better effect of reducing the main frequency of the battery, improving the mechanical strength of the battery, and is beneficial to reducing the risk of battery expansion force failure.

[0036] In some embodiments, the battery module further includes a cable tie, which extends in a ring shape around the third direction and bundles the two rows of battery packs; and / or, the battery module further includes a side plate, which is arranged on both sides of the two rows of battery packs along the first direction, and the two ends of the side plate along the second direction are respectively connected to the two end plates, and the two ends of the end plate along the first direction are respectively connected to the two side plates.

[0037] In the above technical solution, the cable tie forms a circular structure, and the circular structure formed by the side plate and the end plate can limit the two rows of battery packs in the first direction and the second direction, thereby cooperating with the connecting piece to improve the effect of connecting the two rows of battery packs into a whole.

[0038] In some embodiments, there are a plurality of the cable ties, the plurality of the cable ties are arranged along the third direction, and at least two of the cable ties have different strengths.

[0039] In the above technical solution, by arranging a plurality of cable ties along the third direction and including cable ties with greater strength, the area and position for bundling a plurality of battery cells in two rows of battery packs in the third direction can be increased, thereby improving the fixing stability of the battery pack.

[0040] In a second aspect, an embodiment of the utility model further provides a battery, comprising the above-mentioned battery module.

[0041] In a third aspect, an embodiment of the utility model further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of a vehicle provided by an embodiment of the utility model;

[0043] Figure 2 A schematic diagram of a battery provided in an embodiment of the utility model;

[0044] Figure 3 A schematic diagram of the structure of a battery module provided in the first embodiment of the utility model;

[0045] Figure 4 for Figure 3 The middle circle shows the enlarged structural schematic diagram of the area indicated at A and B;

[0046] Figure 5 A view of the battery module provided by the first embodiment of the utility model along the third direction;

[0047] Figure 6 for Figure 5 A cross-sectional view along the CC line;

[0048] Figure 7 for Figure 6 The middle circle shows the enlarged structural schematic diagram of D;

[0049] Figure 8 An exploded view of the isolation plate, the connecting member and the adhesive provided in the first embodiment of the utility model;

[0050] Fig. 9 for Figure 8 The middle circle shows the enlarged structural schematic diagram of E;

[0051] Fig.10 A partial structural schematic diagram of a battery module provided in the first embodiment of the utility model, wherein the battery pack, electrical connector and collection body are not shown;

[0052] Fig.11 A partial structural schematic diagram of a battery module provided in the first embodiment of the utility model, wherein the connector and the collection body are not shown;

[0053] Fig.12 A schematic diagram of the structure of a battery module provided in the second embodiment of the utility model, wherein the avoidance hole and the adhesive are not shown;

[0054] Fig.13 A view of a battery module provided by the second embodiment of the utility model along a third direction;

[0055] Fig.14 for Fig.13 A cross-sectional view along the direction indicated by line FF;

[0056] Fig.15 for Fig.14 The middle circle shows the enlarged structural schematic diagram of H;

[0057] Fig.16 for Fig.13 A cross-sectional view along the direction indicated by line GG;

[0058] Fig.17 A schematic diagram of the structure of a battery module provided in the third embodiment of the utility model, wherein the avoidance hole and the adhesive are not shown;

[0059] Fig.18 A view of a battery module provided by a third embodiment of the utility model along a third direction;

[0060] Fig.19 for Fig.18 A cross-sectional view along the JJ line;

[0061] Fig. 20 for Fig.19 The middle circle shows the enlarged structural schematic diagram of K;

[0062] Fig.21 and Fig. 22 Schematic diagram of the structure of the connecting member and the reinforcing member at different angles provided in the third embodiment of the utility model;

[0063] Fig.23 for Fig. 22 A cross-sectional view along the LL line;

[0064] Fig.24 An exploded view of a battery module provided in a fourth embodiment of the present utility model;

[0065] Fig.25 A schematic diagram of a collection assembly and an electrical connector provided in a fourth embodiment of the utility model;

[0066] Fig.26 This is a schematic diagram of a collection component, an electrical connector and a connector provided in the fourth embodiment of the utility model.

[0067] Reference numerals:

[0068] Vehicle 1; battery 1000; controller 2000; motor 3000;

[0069] Battery module 100; box assembly 200; first part 210; second part 220;

[0070] Battery pack 10; battery cell 11; housing 111; electrical connection portion 112; insulating film 113;

[0071] End plate 21; cable tie 22; first electrical connector 23; second electrical connector 24; buffer 25; side plate 26;

[0072] Connector 30; adhesive 31; reinforcing rib 32; insulating layer 33; reinforcing layer 34; reinforcing member 35; fastener 36; adhesive layer 37;

[0073] Shielding member 40; first shielding member 41; second shielding member 42;

[0074] Collection component 50; isolation plate 51; avoidance hole 511; collection body 52;

[0075] The first direction F1; the second direction F2; the third direction F3. DETAILED DESCRIPTION

[0076] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0077] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0078] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0079] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0081] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0082] The term "plurality" used in the present invention refers to more than two (including two).

[0083] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0084] In some related technologies, the battery includes a box assembly, a battery module disposed in the box assembly, multiple battery cells of the battery module are connected in series and parallel by welding bars and a collection assembly for collecting temperature and voltage is welded, and the battery module is bundled into a group by a cable tie. The battery module is fixed in the box assembly by bolts on the end plate.

[0085] In the battery of the above structure, the shell, tabs, box welds, mounting brackets and other structural parts of the battery cell are prone to cracking and failure under vibration and impact conditions, resulting in unqualified battery products or reduced battery service life.

[0086] Based on this, the present application proposes a battery module, comprising: two rows of battery packs, an end plate and a connector. The two rows of battery packs are arranged along a first direction, and each row of battery packs includes a plurality of battery cells arranged along a second direction. The end plates are provided at both ends of the two rows of battery packs along the second direction. The connector extends along the second direction, and the connector is provided on one side of the two rows of battery packs along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The battery cell includes a shell, and a plurality of shells in each row of battery packs are connected to the connector.

[0087] In the battery module of the above-mentioned structure, multiple shells in each row of battery packs are connected to the connector, so that the connector can connect the shells of two rows of battery packs together, connect the shells of multiple battery cells in the battery pack together, and cooperate with the end plate to fix the battery module into a whole, thereby effectively improving the overall stiffness of the battery module, thereby increasing the battery main frequency, improving the battery's mechanical properties such as vibration and impact, and reducing the risk of cracking and failure of parts and connection structures.

[0088] The battery module disclosed in the embodiment of the present application can be used in an electrical device that uses a battery as a power source or various energy storage systems that use a battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0089] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0090] Reference Figure 1 , Figure 1 A schematic diagram of a vehicle 1 provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1000 is provided inside the vehicle 1, and the battery 1000 may be provided at the bottom, head or tail of the vehicle 1. The battery 1000 may be used to power the vehicle 1, for example, the battery 1000 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0091] In some embodiments of the present application, the battery 1000 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0092] Reference Figure 2 , Figure 2 This is an exploded view of a battery 1000 according to some embodiments of the present application. The battery 1000 includes a case assembly 200 and a battery module 100 . The case assembly 200 has a receiving cavity, and the battery module 100 is received in the receiving cavity of the case assembly 200 .

[0093] The box assembly 200 is used to provide a storage cavity for the battery cell 11, and the box assembly 200 can adopt a variety of structures. In some embodiments, the box assembly 200 may include a first part 210 and a second part 220, the first part 210 and the second part 220 cover each other, and the first part 210 and the second part 220 jointly define a storage cavity for accommodating the battery module 100. The second part 220 may be a hollow structure with one end open, the first part 210 may be a plate-like structure, and the first part 210 covers the open side of the second part 220, so that the first part 210 and the second part 220 jointly define a storage cavity; the first part 210 and the second part 220 may also be hollow structures with one side open, and the open side of the first part 210 covers the open side of the second part 220. Of course, the box assembly 200 formed by the first part 210 and the second part 220 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0094] like Figure 3-Figure 7 As shown, Figure 3 A schematic diagram of the structure of a battery module provided in the first embodiment of the utility model; Figure 4 for Figure 3 The middle circle shows the enlarged structural schematic diagram of the area indicated at A and B; Figure 5 A view of the battery module provided by the first embodiment of the utility model along the third direction; Figure 6 for Figure 5 A cross-sectional view along the CC line; Figure 7 for Figure 6 The enlarged structural diagram of the circle D is shown in the middle. The battery cell 11 may include a shell 111, an electrode assembly and an electrolyte, and the shell 111 is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell 11 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The shell 111 of the battery cell 11 may be provided with a pole or the like connected to the pole ear, as the electrical connection part 112 of the battery cell 11.

[0095] In the battery 1000, the battery module 100 may include multiple battery cells 11, and the multiple battery cells 11 may be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 11 are both connected in series and in parallel. The multiple battery cells 11 of the battery 1000 can be directly connected in series, in parallel, or in a mixed connection to form a battery module 100, and then the battery module 100 is accommodated in the box assembly 200; of course, the battery 1000 can also be a multiple battery module 100 in the form of multiple battery cells 11 connected in series, in parallel, or in a mixed connection, and the multiple battery modules 100 are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box assembly 200. The battery 1000 may also include other structures. For example, the battery 1000 may also include an electrical connector for realizing electrical connection between the multiple battery cells 11.

[0096] Each battery cell 11 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 11 may be cylindrical, flat, rectangular or in other shapes.

[0097] Hereinafter, a battery module 100 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0098] Please refer to Figure 2-Figure 7 According to an embodiment of the present application, the battery module 100 includes: two rows of battery packs 10, an end plate 21 and a connector 30.

[0099] Specifically, two rows of battery packs 10 are arranged along a first direction F1, and each row of battery packs 10 includes a plurality of battery cells 11 arranged along a second direction F2, and the battery cells 11 include a shell 111. The end plates 21 are provided at both ends of the two rows of battery packs 10 along the second direction F2. The connector 30 extends along the second direction F2, and the connector 30 is provided on one side of the two rows of battery packs 10 along the third direction F3, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. And the plurality of shells 111 in each row of battery packs 10 are connected to the connector 30.

[0100] The two rows of battery packs 10 are arranged along a first direction F1, and each row of battery packs 10 includes a plurality of battery cells 11 arranged along a second direction F2, and the first direction F1 is perpendicular to the second direction F2. Thus, the battery cells 11 included in the two rows of battery packs 10 are arranged in an array.

[0101] The end plates 21 are disposed at both ends of the battery pack 10 along the second direction F2, so that the multiple battery cells 11 of the battery pack 10 can be clamped between the two end plates 21. The multiple battery cells 11 of the battery pack 10 are limited in the second direction F2 by the two end plates 21, so that the mechanical strength of the multiple battery cells 11 is improved, and the problem of insufficient strength caused by excessive expansion force of the battery cells 11 along the second direction F2 is improved.

[0102] For example, in some embodiments, the end plate 21 is fixed to the box assembly 200 by fasteners 36 such as bolts, and the box assembly 200 limits the distance between the two end plates 21, thereby facilitating improving the limiting and supporting effects of the two end plates 21 on the multiple battery cells 11 of the battery pack 10.

[0103] Here, the end plate 21 at the same end of each battery pack 10 can be a single-layer plate, a multi-layer plate, a solid plate or a hollow plate, etc. The end plates 21 at the same end of two rows of battery packs 10 can be the same end plate 21 or different end plates 21. Figure 3 As shown, the battery module 100 includes two end plates 21, which are respectively located at two ends of the battery pack 10 along the second direction F2, and the same end of the two rows of battery packs 10 in the second direction F2 abuts against different areas of the end plates 21 in the first direction F1.

[0104] The connector 30 is disposed on one side of the battery pack 10 along the third direction F3, so that the connector 30 and the end plate 21 are disposed on different sides. On the one hand, it is not easy to form position interference. On the other hand, the connector 30 and the end plate 21 can limit the battery pack 10 from different sides, thereby better improving the integrity of the battery module 100.

[0105] The connector 30 extends along the second direction F2 . The connector 30 may be a plate, a block, a stick-shaped structure or an irregular structure, etc. It only needs to be able to connect to at least a portion of the multiple battery cells 11 of the battery pack 10 .

[0106] The multiple shells 111 in each row of battery packs 10 are connected to the connector 30. Here, in each battery pack 10, the shells 111 of a part of the battery cells 11 of the battery pack 10 may be connected to the connector 30, or the shells 111 of all the battery cells 11 may be connected to the connector 30. This can improve the connection between the multiple battery cells 11 in the battery pack 10 through the connector 30, thereby improving the integrity of the battery module 100.

[0107] The connector 30 is connected to the housing 111, rather than to the electrical connection portion 112 or other positions, which has a better effect of increasing the rigidity of the battery module 100, improving the main frequency of the battery 1000, and improving the mechanical properties of the battery 1000 such as vibration and impact. In addition, the connection of the connector 30 to multiple housings 111 can also play a certain role in limiting the multiple battery cells 11 of the battery pack 10 in the second direction F2, thereby restricting the expansion force of the battery cells 11 along the second direction F2, and solving the problem of insufficient strength of the battery 100 due to excessive expansion force of the battery module 100.

[0108] According to the battery module 100 of the embodiment of the utility model, multiple shells 111 in each row of battery packs 10 are connected to the connecting member 30, so that the connecting member 30 can connect the shells 111 of two rows of battery packs 10 together, connect the shells 111 of multiple battery cells 11 in the battery pack 10 together, and cooperate with the end plate 21 to fix the battery module 100 into a whole, thereby effectively improving the overall stiffness of the battery module 100, thereby increasing the main frequency of the battery 1000, improving the mechanical properties of the battery 1000 such as vibration and impact, and reducing the risk of cracking and failure of parts and connecting structures.

[0109] In some embodiments, the number of housings 111 connected to the connector 30 in each row of battery packs 10 is not less than half the number of battery cells 11 included in the battery pack 10, so as to further improve the effect of the connector 30 fixing the battery module 100 into a whole and improve the mechanical performance.

[0110] In some specific embodiments, Figure 2-Figure 5 As shown, the plurality of battery cells 11 of the battery pack 10 include first battery cells and second battery cells. The first battery cells of the two rows of battery packs 10 are electrically connected via the first electrical connector 23 , and the second battery cells of the two rows of battery packs 10 are both connected to the connector 30 .

[0111] The first battery cell refers to a battery cell 11 that is directly electrically connected to an adjacent battery pack 10 through an electrical connector 30 (such as a first electrical connector 23), and the second battery cell refers to a battery cell 11 that is not directly electrically connected to an adjacent battery pack 10 through an electrical connector 30, such as a second battery cell that can be electrically connected to a battery cell 11 of the same battery pack 10 through a second electrical connector 24. Except for the electrical connection method, the structures of the first battery cell and the second battery cell may be the same or different.

[0112] Since the first electrical connector 23 connects two rows of battery packs 10, the first electrical connector 23 generally extends along the first direction F1; the second electrical connector 24 connects the battery cells 11 of the same battery pack 10, so the second electrical connector 24 can generally extend along the second direction F2. The connector 30 extends along the second direction F2, and is connected to the housing 111 of the second battery cell through the connector 30, but not to the housing 111 of the first battery cell, so that the first electrical connector 23 connected to the first battery cell is not easy to interfere with the connector 30, and the two can be staggered along the second direction F2, and the structural design is more reasonable.

[0113] In such Figure 3 and Figure 4In the specific example shown, each row of battery packs 10 includes a first battery cell, and the other battery cells 11 are all second battery cells. The two rows of battery packs 10 are electrically connected through a first electrical connector 23 to achieve series or parallel connection of the two rows of battery packs 10. The first battery cell is located on one side of all the second battery cells along the second direction F2, and the corresponding first electrical connector 23 can be located on one side of the connector 30 along the second direction F2. The connector 30 can be an integrated structure, which has a higher connection strength for the two rows of battery packs 10 and is easy to be staggered with the first electrical connector 23.

[0114] In other embodiments, Fig.12 and Fig.17 As shown, Fig.12 A schematic diagram of the structure of a battery module 100 provided in a second embodiment of the present utility model; Fig.17 This is a schematic diagram of the structure of the battery module 100 provided in the third embodiment of the utility model. The two rows of battery packs 10 may only include the second battery cells. In other words, the two rows of battery packs 10 are not directly connected in parallel or in series through the first electrical connector 23. They may transmit current to the outside respectively, or they may be electrically connected in series and in parallel through other structures outside the battery module 100. In the above embodiment, the battery module 100 only includes the second electrical connector 24, which may be staggered with the connector 30 along the first direction F1, so the connector 30 may be connected to the housing 111 of all the battery cells 11 of the battery pack 10, thereby improving the overall rigidity.

[0115] According to some embodiments of the present invention, Figure 6 and Figure 7 As shown, the battery module 100 further includes a buffer 25. In some embodiments, the buffer 25 is disposed between two adjacent battery cells 11 of the same battery pack 10; in other embodiments, the buffer 25 is disposed between two adjacent rows of battery packs 10; of course, the buffer 25 may also be disposed between two adjacent battery cells 11 of the same battery pack 10 and between two rows of battery packs 10.

[0116] The buffer 25 refers to a component that can be compressed and deformed to a certain extent when subjected to external forces. For example, when the buffer 25 is subjected to external forces such as the expansion force from the battery cell 11 or the external impact force, it plays a buffering role by deforming. The material of the buffer 25 includes but is not limited to polyethylene, polypropylene, polyethylene terephthalate, aerogel, foam material, silicone rubber, etc. The buffer 25 can be a solid material, a porous material, or the buffer 25 can have a hollow structure inside, etc., as long as it can play a buffering role.

[0117] The buffer member 25 can reduce the damage of the battery cell 11 caused by the external impact force, and limit the expansion of the battery cell 11 to improve the performance of the battery cell 11.

[0118] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the battery cell 11 includes an electrical connection portion 112 , which is disposed on one side of the housing 111 along the third direction F3 , and the connector 30 is located between the electrical connection portions 112 of two adjacent rows of battery packs 10 .

[0119] The electrical connection portion 112 can be used to achieve electrical connection between multiple battery cells 11 of the same group, or to achieve electrical connection between two rows of battery packs 10. For example, the electrical connection portions 112 of two battery cells 11 can be electrically connected through an electrical connector 30 such as a tab, whereby the electrical connector 30 is located on one side of the shell 111 along the third direction F3, and the electrical connection portion 112 and the electrical connector 30 occupy the space located on one side of the shell 111 along the third direction F3.

[0120] The connector 30 is located between the electrical connectors 112 of two adjacent rows of battery packs 10, wherein in an embodiment in which the electrical connector 112 provided on the same side of the shell 111 includes a positive electrode connector and a negative electrode connector, in the first direction F1, the positive electrode connector and the negative electrode connector on the same shell 111 are located on the same side of the connector 30, and the electrical connectors 112 of the two rows of battery packs 10 are respectively located on both sides of the connector 30.

[0121] In the above embodiment, the connector 30 and the electrical connection portion 112 are located on the same side of the housing 111 along the third direction F3, occupying the space on the same side of the housing 111 along the third direction F3, which is conducive to reducing the overall occupied space of the battery module 100 along the third direction F3, making the structure more compact. In addition, in the first direction F1 and the second direction F2, the connector 30 and the electrical connection portion 112 will not interfere with each other, and the connector 30 can be connected to the housings 111 of two rows of battery packs 10, and the position arrangement is more reasonable.

[0122] The connection method between the connector 30 and the housing 111 can be flexibly set, including but not limited to bonding, welding, fastener 36 connection, etc. Figure 7-Figure 9 As shown, the connector 30 is connected to the housing 111 by adhesive 31. The adhesive 31 can be formed by applying glue, sticking double-sided tape, etc. The adhesive 31 connection method is simple, there is no need to make a complex design of the structure of the connector 30, and there is no need to change the structure of the housing 111, and the connection is firm and reliable.

[0123] In some embodiments, Figure 7-Figure 11 As shown, Figure 8 An exploded view of the isolation plate 51, the connecting member 30 and the adhesive 31 provided in the first embodiment of the utility model; Fig. 9 for Figure 8 The middle circle shows the enlarged structural schematic diagram of E; Fig.10 and Fig.11 The schematic diagram of the partial structure of the battery module 100 provided in the first embodiment of the utility model. The battery module 100 further includes a shielding member 40, which is disposed between the shell 111 and the connecting member 30, and the gap between two adjacent shells 111 is opposite to the shielding member 40 along the third direction F3, and the adhesive 31 is staggered with the shielding member 40 perpendicular to the third direction F3.

[0124] The shielding member 40 can be any structure such as a plate or a block. The gap between two adjacent shells 111 refers to the gap in the area opposite to the connecting member 30 along the third direction F3, that is, the gap whose projection along the third direction F3 is located within the projection range of the connecting member 30 along the third direction F3. The gap between two adjacent shells 111 is opposite to the shielding member 40 along the third direction F3, which means that the projection of the above-mentioned gap along the third direction F3 is located within the projection range of the shielding member 40 along the third direction F3, so that the shielding member 40 can completely block the gap in the area corresponding to the connecting member 30 in the third direction F3; and the gap whose projection along the third direction F3 does not fall within the projection range of the connecting member 30 may be opposite to the shielding member 40 along the third direction F3 or not.

[0125] The adhesive 31 and the shielding member 40 are staggered perpendicular to the third direction F3, for example, the adhesive 31 and the shielding member 40 are staggered along the first direction F1, or the adhesive 31 and the shielding member 40 are staggered along the second direction F2, etc. In other words, the adhesive 31 and the shielding member 40 are arranged in a direction perpendicular to the third direction F3, and the projection of the adhesive 31 along the third direction F3 does not overlap with the projection of the shielding member 40 along the third direction F3.

[0126] Thus, the adhesive 31 can contact the housing 111 and the connector 30 without being separated by the shielding member 40, thereby achieving reliable bonding between the housing 111 and the connector 30. In addition, the shielding member 40 can shield the gap between two adjacent housings 111, so that the adhesive 31 is not easy to overflow between the two adjacent housings 111, thereby increasing the amount of adhesive 31 between the housing 111 and the connector 30 and improving bonding reliability.

[0127] In some embodiments, Figure 3 and Figure 8-Figure 9 As shown, the battery module 100 further includes a collection component 50. The collection component 50 includes an isolation plate 51 and a collection body 52, the isolation plate 51 is disposed between the collection body 52 and the shell 111, the isolation plate 51 is provided with a plurality of avoidance holes 511 penetrating along the third direction F3, the adhesive 31 is located in the avoidance holes 511 and connects the connector 30 and the shell 111, and the portion of the isolation plate 51 located between two adjacent avoidance holes 511 forms a shielding member 40.

[0128] The collection component 50 is used to collect information of the battery cell 11 so as to realize the status monitoring of the battery cell 11. For example, the collection part of the collection body 52 of the collection component 50 can be connected to the electrical connection part 112 of the battery cell 11; or the electrical connection part 30 is connected to the electrical connection part 112 to realize the series-parallel connection of the electrical connection part 112, and the collection part of the collection body 52 can be connected to the electrical connection part 30 to collect information such as temperature and voltage.

[0129] The isolation plate 51 can be made of insulating materials such as plastic, which can play an isolating and insulating role, so that other areas of the collection body 52 (such as the circuit board area) except the collection part are isolated from the battery cell 11 to prevent the collection body 52 from short circuiting. The isolation plate 51 can be a flat plate, or it can be provided with ribs, columns, grooves and other structures.

[0130] The isolation plate 51 is provided with avoidance holes 511, so that the isolation plate 51 can avoid the adhesive 31, which is convenient for bonding and directly connecting the connector 30 and the housing 111. In addition, the portion of the isolation plate 51 located between two adjacent avoidance holes 511 is formed as a shielding member 40. In other words, the shielding member 40 is integrated into the isolation plate 51, and there is no need to separately provide a component for shielding, and there is no need to separately install and fix the shielding member 40. For example, the shielding member 40 can be installed by installing the isolation plate 51, simplifying the structure between the connector 30 and the housing 111, making the structure compact, convenient for bonding, and less prone to the problem of adhesive 31 overflow.

[0131] In some specific embodiments, Fig. 9 and Fig.11 As shown, the shielding member 40 includes a first shielding member 41 and a second shielding member 42. The gap between two rows of battery packs 10 is opposite to the first shielding member 41 along the third direction F3, and the gap between two adjacent shells 111 of the same battery pack 10 is opposite to the second shielding member 42 along the third direction F3.

[0132] The first shielding member 41 and the second shielding member 42 can respectively shield the gaps formed between the battery packs 10 and the gaps within the battery pack 10, and can better prevent the adhesive 31 from overflowing into the gaps. Fig. 9 As shown, the avoidance holes 511 may be formed into two rows spaced apart along the first direction F1, and the portion between the two rows of avoidance holes 511 forms the first shielding member 41; each row includes a plurality of avoidance holes 511 spaced apart along the second direction F2, and the portion between the two avoidance holes 511 forms the second shielding member 42. By adjusting the size of the avoidance holes 511 along the first direction F1 and the second direction F2, the position and size of the first shielding member 41 and the second shielding member 42 along the first direction F1 and the second direction F2 can be adjusted.

[0133] In some specific embodiments, in the arrangement direction of two adjacent battery cells 11 , the size of the shielding member 40 is greater than the distance between the housings 111 of the two battery cells 11 .

[0134] For example Fig. 9 As shown, when two adjacent battery cells 11 are battery cells 11 of two rows of battery packs 10, the arrangement direction is the first direction F1, and the spacing between the shells 111 of the two rows of battery packs 10 along the first direction F1 is smaller than the size of the first covering member 41 along the first direction F1; when two adjacent battery cells 11 are two battery cells 11 of the same battery 1000, the arrangement direction is the second direction F2, and the spacing between the shells 111 of the two battery cells 11 of the same battery pack 10 along the second direction F2 is smaller than the size of the second covering member 42 along the second direction F2.

[0135] The avoidance hole 511 can be any shape such as a rectangular hole, an elliptical hole, an oval hole, etc., and the edge shapes of the corresponding first shielding member 41 and the second shielding member 42 can be flexibly changed with the shape of the avoidance hole 511. Regardless of how the edge shapes of the avoidance hole 511 and the shielding member 40 change, the size of the shielding member 40 refers to the minimum size of the shielding member 40.

[0136] Therefore, the shielding member 40 can better shield the gap between two adjacent battery cells 11 , and better prevent the adhesive 31 from overflowing into the space between the housings 111 of the two battery cells 11 .

[0137] In some specific embodiments, Figure 7 As shown, the shell 111 of the battery cell 11 is covered with an insulating film 113, and at least part of the area of ​​the shell 111 opposite to the avoidance hole 511 is not covered by the insulating film 113, so that the adhesive 31 can be directly bonded to the shell 111, thereby improving the reliability of bonding.

[0138] According to some embodiments of the present invention, Figure 4 , Figure 6 and Figure 7 As shown, a reinforcing rib 32 is provided on the side of the connecting member 30 facing away from the housing 111. The reinforcing rib 32 refers to a convex rib provided on the connecting member 30. The shape and size of the reinforcing rib 32 can be flexibly set, for example, the reinforcing rib 32 can extend along any shape such as a straight line or a curve; the reinforcing rib 32 can extend along the first direction F1 or the second direction F2, or extend obliquely relative to the first direction F1 and the second direction F2, etc.; the cross-section of the reinforcing rib 32 perpendicular to the extension direction includes but is not limited to a triangle, a trapezoid, a semicircle, etc.

[0139] The structural strength of the connector 30 can be improved by providing the reinforcing ribs 32, thereby further improving the connection strength of the connector 30 to the multiple battery cells 11 of the two rows of battery packs 10, improving the integrity of the battery module 100, and being more conducive to reducing the main frequency of the battery 1000, and improving the mechanical properties such as vibration and impact of the battery 1000. In addition, by providing the reinforcing ribs 32 on the side of the connector 30 facing away from the housing 111, the reinforcing ribs 32 and the housing 111 will not interfere with each other, which facilitates the connection between the connector 30 and the housing 111.

[0140] In some embodiments, continue to refer to Figure 4 , Figure 6 and Figure 7 As shown, the connecting member 30 is provided with a plurality of reinforcing ribs 32 , the plurality of reinforcing ribs 32 are arranged at intervals along the first direction F1 , and the reinforcing ribs 32 extend along the second direction F2 .

[0141] The battery pack 10 includes a plurality of battery cells 11 arranged in the second direction F2, so that the battery cells 11 expand more significantly along the second direction F2, and thus the connector 30 is subjected to a more significant expansion force along the second direction F2. The reinforcing ribs 32 extend along the second direction F2, which is more conducive to improving the ability of the connector 30 to withstand the expansion force along the second direction F2, and the effect of improving the strength of the connector 30 is better. In addition, the plurality of reinforcing ribs 32 are arranged at intervals along the first direction F1, which can strengthen the connector 30 from different positions in the first direction F1, so that the strength improvement effect of different regions of the connector 30 is more uniform.

[0142] In some embodiments of the present invention, the materials of different regions of the connecting member 30 may be the same, and the connecting member 30 may also be composed of several parts with different materials.

[0143] For example, in some embodiments, Figure 12-Figure 15 As shown, Fig.13 A view of the battery module 100 provided in the second embodiment of the utility model along the third direction F3; Fig.14 for Fig.13 A cross-sectional view along the direction indicated by line FF; Fig.15 for Fig.14 The middle circle shows an enlarged structural diagram of the H. The connector 30 includes a reinforcement layer 34 and an insulating layer 33 wrapped around the reinforcement layer 34 . The insulating layer 33 is connected to the housing 111 . The strength of the reinforcement layer 34 is greater than that of the insulating layer 33 .

[0144] The insulating layer 33 is coated on the outside of the reinforcing layer 34. Here, the insulating layer 33 may cover a part of the reinforcing layer 34, or the insulating layer 33 may cover the entire reinforcing layer 34. Fig.12 and Fig.13As shown, the insulating layer 33 covers the portion of the reinforcing layer 34 that is opposite to the battery cell 11 along the third direction F3 , and exposes the portion of the reinforcing layer 34 that is opposite to the end plate 21 along the third direction F3 .

[0145] The insulating layer 33 is wrapped around the reinforcing layer 34 and connected to the shell 111, so that the insulating layer 33 can separate the reinforcing layer 34 from the shell 111, the electrical connection part 112, the electrical connection part 30 and other structures. In the embodiment where the reinforcing layer 34 is a metal part, the risk of short circuit in the battery module 100 caused by the reinforcing layer 34 can be avoided.

[0146] In addition, the material of the insulating layer 33 includes but is not limited to plastic, epoxy resin, etc.; the material of the reinforcing layer 34 includes but is not limited to metals such as stainless steel, non-metals with high strength such as glass fiber, etc. The strength of the reinforcing layer 34 is greater than that of the insulating layer 33, which is beneficial to improving the overall strength of the connector 30, thereby improving the effect of the connector 30 connecting the two rows of battery packs 10 into a whole, and the effect of reducing the main frequency of the battery 1000 is better, and it is beneficial to improve the effect of restraining the expansion force of the battery cell 11.

[0147] In some embodiments of the present invention, Figure 17-Figure 20 As shown, Fig.18 A view of a battery module 100 provided in a third embodiment of the present utility model along a third direction F3; Fig.19 for Fig.18 A cross-sectional view along the JJ line;

[0148] Fig. 20 for Fig.19 The middle circle shows an enlarged structural diagram of K. A reinforcing member 35 is provided on the side of the connecting member 30 facing away from the housing 111 , and the reinforcing member 35 is connected to the end plates 21 at both ends of the battery pack 10 along the second direction F2 .

[0149] The reinforcing member 35 and the connecting member 30 may be connected together by means of an adhesive layer 37 (such as glue, double-sided tape, etc.), welding, etc., or the reinforcing member 35 and the connecting member 30 may be abutted or spaced apart by a certain gap, etc. The connection methods of the reinforcing member 35 and the end plate 21 include but are not limited to clamping, connection with fasteners 36, etc. Figure 17-Figure 18 and Figure 21-23 As shown, Fig.21 and Fig. 22 Schematic diagram of the structure of the connecting member 30 and the reinforcing member 35 at different angles provided in the third embodiment of the utility model; Fig.23 for Fig. 22 In the cross-sectional view along the LL line, the reinforcing member 35 is bonded to the surface of the connecting member 30 on the side facing away from the shell 111 through the adhesive layer 37 , and the two ends of the reinforcing member 35 are respectively connected to the two end plates 21 through fasteners 36 .

[0150] By connecting the two end plates 21 with the reinforcement 35, the stability of the two end plates 21 limiting the middle multiple battery cells 11 can be improved, the effect of bearing the expansion force of the battery cells 11 is better, and the risk of failure of the expansion force of the battery 1000 is reduced. The reinforcement 35 is arranged on the side of the shell 111 of the connector 30 that is away from the battery cell 11, so that the connection between the connector 30 and the shell 111 is not interfered by the reinforcement 35, and the reinforcement 35 can play a certain limiting and supporting effect on the connector 30 in the third direction F3, which is conducive to improving the stability of the connector 30.

[0151] In some embodiments, Figure 12-16 As shown, both ends of the connector 30 along the second direction F2 can be connected to the end plates 21 respectively. The connection methods of the connector 30 and the end plates 21 include but are not limited to snap connection, connection with fasteners 36, etc. By connecting the two end plates 21 through the connector 30, the two end plates 21 and the multiple battery cells 11 in the middle can be further connected into a whole, which has a better effect of reducing the main frequency of the battery 1000, and a better effect of improving the mechanical strength of the battery 1000, and is conducive to reducing the risk of expansion force failure of the battery 1000.

[0152] For example Fig.12 and Fig.13 As shown, the reinforcing layer 34 of the connector 30 can be connected to the end plate 21, so that the connection strength between the connector 30 and the end plate 21 is good. For example, in some embodiments with a reinforcing member 35, the connector 30 and the reinforcing member 35 can both be connected to the end plates 21 at both ends, which can better reduce the risk of expansion force failure of the battery 1000.

[0153] In some embodiments, Figure 3-Figure 5 As shown, both ends of the connector 30 along the second direction F2 are spaced apart from the end plate 21. The arrangement of the connector 30 is not interfered with by the two end plates 21, making the connector 30 easier to process and install, and facilitating the avoidance of the connector 30 and the electrical connector 30, as shown in FIG. Figure 4 As shown, the second electrical connector 24 is located between the connector 30 and the end plate 21, so that the second electrical connector 24 can realize the electrical connection of two rows of battery packs 10, and the connector 30 and the second electrical connector 24 form a structural avoidance, and the structural design is more reasonable.

[0154] In addition, if Fig.17 , Fig.18 and Fig.21 As shown, in some embodiments with reinforcement members 35, by separating the connector 30 from the end plate 21, both ends of the connector 30 can avoid the reinforcement members 35, which facilitates the connection of the reinforcement members 35 to the end plate 21 without interfering with the connector 30, and makes the structural design more reasonable.

[0155] According to some embodiments of the present invention, Figure 3, Fig.12 and Fig.17 As shown, the battery module 100 further includes a cable tie 22, which extends in a ring shape around the third direction F3, and the cable tie 22 bundles two rows of battery packs 10, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. In other words, the cable tie 22 is located on both sides of the two rows of battery packs 10 along the first direction F1 and on both sides of the second direction F2, so as to bundle the two rows of battery packs 10. Here, a certain gap may be reserved between the inner circumference of the cable tie 22 and the two rows of battery packs 10, and the inner circumference of the cable tie 22 may also contact or press fit with the two rows of battery packs 10.

[0156] By providing the cable tie 22 to cooperate with the connector 30 and the end plate 21 , the integrity of the battery module 100 is further improved, and the expansion force of the battery cell 11 is limited.

[0157] According to some embodiments of the present invention, Figure 24-26 As shown, Fig.24 An exploded view of a battery module provided in the fourth embodiment of the utility model, Fig.25 and Fig.26 The battery module 100 further includes side panels 26 disposed on both sides of the two rows of battery packs 10 along the first direction F1, and the two ends of the side panels 26 along the second direction F2 are respectively connected to the two end panels 21, and the two ends of the end panels 21 along the first direction F1 are respectively connected to the two side panels 26.

[0158] The structures of the side panels 26 and the end panels 21 may be the same or different. Fig.24 As shown, the end plate 21 has a hollow structure, so that the end plate 21 has a certain buffering performance; the side plate 26 is a solid thin plate, which can provide a stable support and limit effect for the battery pack 10 and occupies a small space. The connection method between the side plate 26 and the end plate 21 includes but is not limited to welding, bonding, fastener connection, etc.

[0159] In the above embodiment, the two side plates 26 and the two end plates 21 are connected to form an annular structure extending around the third direction F3, which can provide more reliable support and limitation for the two rows of battery packs 10 from both sides of the first direction F1 and both sides of the second direction F2, and can cooperate with the connecting member 30 to improve the effect of connecting the battery cells 11 of the two rows of battery packs 10 into a whole.

[0160] In some embodiments including the cable tie 22, such as Figure 3 As shown, there are multiple cable ties 22, and the multiple cable ties 22 are arranged along the third direction F3. At least two cable ties 22 have different strengths.

[0161] The number of cable ties 22 may be two or more. Two adjacent cable ties 22 may be spaced a certain distance apart in the third direction F3, or may be in contact with each other. By arranging a plurality of cable ties 22 along the third direction F3, the area and position for bundling a plurality of battery cells 11 of two rows of battery packs 10 in the third direction F3 can be increased, thereby improving the fixing stability of the battery pack 10.

[0162] At least two cable ties 22 have different strengths, which means that the multiple cable ties 22 may have two or more strengths. For example, there are two cable ties 22 and the two cable ties 22 have different strengths; for another example, there are three cable ties 22, two of which have the same strength and are different from the third cable tie 22, or the strengths of the three cable ties 22 are all different.

[0163] The two cable ties 22 with different strengths may be of different sizes or different materials. For example, in some embodiments, Figure 3 As shown, the two cable ties 22 are respectively a steel cable tie and a plastic cable tie. The steel cable tie has higher strength and the plastic cable tie has lower weight, which can not only improve the anti-expansion performance of the battery module 100 but also reduce the overall weight of the battery module 100 .

[0164] The battery 1000 according to the embodiment of the second aspect of the utility model includes the battery module 100 according to the embodiment of the first aspect of the utility model. Therefore, by adopting the above-mentioned battery module 100, it is beneficial to connect the shells 111 of the two rows of battery packs 10 together, and connect the shells 111 of multiple battery cells 11 in the battery pack 10 together, fix the battery module 100 into a whole, effectively improve the overall rigidity of the battery module 100, and then improve the main frequency of the battery 1000, improve the mechanical properties of the battery 1000 such as vibration and impact, and reduce the risk of cracking and failure of parts and connection structures.

[0165] The electrical device according to the third embodiment of the utility model includes the battery 1000 according to the second embodiment of the utility model, and the battery 1000 is used to provide electrical energy for the electrical device. Therefore, by adopting the above-mentioned battery 1000, it is conducive to connecting the shells 111 of the two rows of battery packs 10 together, and connecting the shells 111 of multiple battery cells 11 in the battery pack 10 together, fixing the battery module 100 into a whole, effectively improving the overall rigidity of the battery module 100, thereby increasing the main frequency of the battery 1000, improving the mechanical properties of the battery 1000 such as vibration and impact, and reducing the risk of cracking and failure of parts and connection structures.

[0166] The battery 1000 according to some specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0167] like Figure 2-Figure 11As shown, the battery 1000 according to the first embodiment of the utility model includes a box assembly 200 and a battery module 100 disposed in the box assembly 200. The battery module 100 includes two rows of battery packs 10 arranged along a first direction F1, and each battery pack 10 includes a plurality of battery cells 11 stacked along a second direction F2. End plates 21 are respectively provided at both ends of the battery pack 10 along the second direction F2, and the two rows of battery packs 10 are bundled together by a tie 22.

[0168] The battery pack 10 is bonded to the box assembly 200 on one side along the third direction F3, and the battery pack 10 is provided with a collection assembly 50 and a connector 30 on the other side along the third direction F3. The collection body 52 of the collection assembly 50 is provided on the side of the isolation plate 51 facing away from the shell 111 of the battery cell 11, and the collection body 52 is welded to the electrical connector 30 for connecting the electrical connection part 112 of the battery cell 11 for sampling. Two rows of avoidance holes 511 are provided in the middle of the isolation plate 51 in the first direction F1, and each row includes a plurality of avoidance holes 511 arranged along the second direction F2, and the avoidance holes 511 are opposite to the shoulder of the shell 111. The avoidance holes 511 are in the shape of an oblong, a square, etc., exposing the shoulder of the shell 111, and the gap between the two shells 111 is blocked by the shielding member 40 between the avoidance holes 511. Glue is applied in the avoidance hole 511 , and the connector 30 is disposed on some of the isolation plate 51 facing away from the shell 111 and connected to the glue 31 in the avoidance hole 511 , thereby achieving adhesion with the shell 111 and connecting the battery cells 11 of the battery module 100 into a whole.

[0169] The connector 30 is formed by extrusion and drawing, and can be a high-strength plastic part, for example, an extruded fiber reinforced composite material. Some of the connectors 30 facing away from the shell 111 can be provided with reinforcing ribs 32, so that the cross section of the connector 30 perpendicular to the second direction F2 is formed into a mountain-shaped or sun-shaped structure. The gap between the connector 30 and the shell 111 is 0.5mm to 2.0mm, and the thickness of the shielding member 40 along the third direction F3 can be smaller than the gap between the connector 30 and the shell 111, so that the adhesive 31 can be more tightly bonded to the connector 30 and the shell 111.

[0170] During the assembly process, the battery module 100 except the connector 30 can be assembled first, and then placed in the box assembly 200, and the side of the shell 111 facing away from the connector 30 is bonded to the box assembly 200, and the end plate 21 is connected to the box assembly 200 through the fastener 36, and then the connector 30 is pressed on after glue is applied in the avoidance hole 511.

[0171] In the above embodiment, by adding connectors 30 and adhesive 31, the battery cells 11 of the battery module 100 are fixed into a whole, thereby increasing the rigidity of the battery module 100, thereby improving the main frequency of the battery 1000, reducing the risk of cracking and failure of components such as the shell 111, the electrical connector 30, the weld of the box assembly 200, and the mounting bracket, thereby improving the mechanical properties of the battery 1000 such as vibration and impact.

[0172] like Figure 12-16 As shown, the difference between the battery 1000 according to the second embodiment of the utility model and the battery 1000 according to the first embodiment is that in the second embodiment, the connector 30 includes a reinforcing layer 34 and an insulating layer 33, the reinforcing layer 34 is a steel plate, and the insulating layer 33 is a plastic layer. The insulating layer 33 wraps the middle part of the reinforcing layer 34 to achieve insulation between the reinforcing layer 34 and the electrical connector 30, the electrical connection part 112 and other charged structures. The two ends of the reinforcing layer 34 along the second direction F2 are respectively connected to the end plate 21 by fasteners 36, which has a better effect of improving the rigidity of the battery module 100 and preventing the expansion force from failing.

[0173] like Figure 17-Figure 23 As shown, the difference between the battery 1000 according to the third embodiment of the utility model and the battery 1000 of the first embodiment is that, in the third embodiment, two reinforcing ribs 32 are provided on the side of the connecting member 30 facing away from the shell 111 and a reinforcing member 35 formed of a steel plate, the reinforcing member 35 is located between the two reinforcing ribs 32, and the two ends of the reinforcing member 35 along the second direction F2 are respectively connected to the end plate 21 by fasteners 36, which has a better effect on improving the rigidity of the battery module 100 and preventing the expansion force from failing.

[0174] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0175] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: Two rows of battery packs, the two rows of battery packs are arranged along a first direction, each row of battery packs comprises a plurality of battery cells arranged along a second direction, and the battery cells comprise a housing; End plates, provided at both ends of the two rows of battery packs along the second direction; A connecting member extending along the second direction, the connecting member is arranged on one side of the two rows of battery packs along the third direction, the first direction, the second direction and the third direction are perpendicular to each other, and a plurality of the shells in each row of the battery packs are connected to the connecting member.

2. The battery module according to claim 1, characterized in that: The number of the shells connected to the connecting member in each row of the battery pack is not less than half the number of battery cells included in the battery pack.

3. The battery module according to claim 2, characterized in that: The plurality of battery cells of the battery pack include first battery cells and second battery cells. The first battery cells of two rows of the battery pack are electrically connected via a first electrical connector, and the second battery cells of two rows of the battery pack are both connected to the connector.

4. The battery module according to claim 1, characterized in that: It also includes a buffer, which is arranged between two adjacent battery cells of the same battery pack; and / or the buffer is arranged between two adjacent rows of battery packs.

5. The battery module according to claim 1, characterized in that: The battery cell includes an electrical connection portion, the electrical connection portion is disposed on one side of the housing along the third direction, and the connector is located between the electrical connection portions of two adjacent rows of battery packs.

6. The battery module according to any one of claims 1 to 5, characterized in that: The connecting piece is connected to the shell by adhesive.

7. The battery module according to claim 6, characterized in that: It also includes a shielding member, which is arranged between the shell and the connecting member, and the gap between two adjacent shells is opposite to the shielding member along the third direction, and the adhesive and the shielding member are staggered perpendicular to the third direction.

8. The battery module according to claim 7, characterized in that: It also includes a collection component, which includes an isolation plate and a collection body. The isolation plate is arranged between the collection body and the shell. The isolation plate is provided with a plurality of avoidance holes penetrating along the third direction. The adhesive is located in the avoidance holes and connects the connecting member and the shell. The portion of the isolation plate located between two adjacent avoidance holes forms the shielding member.

9. The battery module according to claim 7, characterized in that: In the arrangement direction of two adjacent battery cells, the size of the shielding member is greater than the distance between the shells of the two battery cells.

10. The battery module according to claim 7, characterized in that: The shielding member includes a first shielding member and a second shielding member, a gap between two rows of battery packs is opposite to the first shielding member along the third direction, and a gap between two adjacent shells of the same battery pack is opposite to the second shielding member along the third direction.

11. The battery module according to claim 1, characterized in that: A reinforcing rib is provided on a side of the connecting member facing away from the shell.

12. The battery module according to claim 11, characterized in that: The connecting member is provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs are arranged at intervals along the first direction, and the reinforcing ribs extend along the second direction.

13. The battery module according to claim 1, characterized in that: The connecting member includes a reinforcement layer and an insulating layer coated outside the reinforcement layer, the insulating layer is connected to the shell, and the strength of the reinforcement layer is greater than the strength of the insulating layer.

14. The battery module according to claim 1, characterized in that: A reinforcing member is provided on a side of the connecting member facing away from the shell, and the reinforcing member is connected to the end plates at both ends of the battery pack along the second direction.

15. The battery module according to claim 1, 13 or 14, characterized in that: Both ends of the connecting member along the second direction are spaced apart from the end plate; or, Two ends of the connecting member along the second direction are respectively connected to the end plates.

16. The battery module according to claim 1, characterized in that: The battery module further includes a cable tie, the cable tie extends in a ring shape around the third direction, and the cable tie bundles the two rows of battery packs; and / or, The battery module also includes side plates, which are arranged on both sides of the two rows of battery packs along the first direction, and the two ends of the side plates along the second direction are respectively connected to the two end plates, and the two ends of the end plates along the first direction are respectively connected to the two side plates.

17. The battery module according to claim 16, characterized in that: There are a plurality of cable ties, and the plurality of cable ties are arranged along the third direction, and at least two of the cable ties have different strengths.

18. A battery, characterized in that: Comprising the battery module as claimed in any one of claims 1 to 17.

19. An electrical device, characterized in that: The battery as claimed in claim 18 is used to provide electrical energy to the electrical device.

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