Battery module, battery box and counterweight device

Abstract

The utility model belongs to the technical field of power batteries, and provides a battery module which is formed by arranging a plurality of square battery cells, every two adjacent battery cells form a battery cell unit, and positive and negative electrodes of every two adjacent battery cell units are opposite; the battery module comprises a parallel row, a first connecting row and a second connecting row, the first connecting row is arranged on the positive electrodes of the two battery cells in the battery cell unit, and the second connecting row is arranged on the negative electrodes of the two battery cells in the battery cell unit; the first connecting row and the second connecting row are both provided with connecting lugs connected with the parallel rows, and the connecting lugs on the first connecting row and the connecting lugs on the second connecting row of the same battery cell unit are oppositely arranged; and the parallel bars are selectively connected to the first connecting bars or the second connecting bars in the two adjacent battery cell units. The utility model further provides a battery box with the battery module and a counterweight device provided with the battery box. The battery pack solves the technical problems that structural parts on an existing battery pack are high in integration degree and difficult to use universally.

Description

Technical Field

[0001] The present application belongs to the technical field of power batteries, and in particular relates to a modular battery module, a battery box and a counterweight device. Background Art

[0002] In the application process of automotive batteries, vehicles of different types, specifications and models have different technical requirements for the overall weight, shape, size, electrical parameters, etc. of the battery pack. For battery packs of the same model but from different batches, the design scheme also needs to be adjusted accordingly due to changes in the supply chain materials such as the battery cells and electrical parts used.

[0003] At present, the industry generally designs the structure of battery packs independently according to the technical requirements and optional materials of various models, which leads to the commonality problem of each major structural component on the battery pack with other models of battery packs, and has the following disadvantages:

[0004] (1) The commonality of the main structural parts of the battery is low, and it is difficult for batteries of different specifications and models to be used interchangeably;

[0005] (2) The main structural parts of the battery are highly integrated. When there are minor changes in the design, the parts of the new and old versions of the same model of battery may not be compatible.

[0006] (3) After the battery is put into use, it is difficult to mix and match battery modules and cells of different specifications;

[0007] (4) The processing complexity of a single part is high, and more adaptability requirements are required, resulting in lower part yield and higher production costs;

[0008] (5) The service life of structural parts such as sheet metal and insulating plates is generally longer than that of battery cells. When battery cells are retired and scrapped, it is impossible to use the same battery cells for reassembly. Structural parts that are still within their service life cycle are often scrapped together with the original battery cells and electrical parts. Summary of the invention

[0009] The purpose of the embodiments of the present application is to provide a battery module, a battery box and a counterweight device to solve the technical problem that the structural parts of the battery pack in the prior art have a high degree of integration and are difficult to use universally.

[0010] To achieve the above purpose, the technical solution adopted in this application is:

[0011] In a first aspect, the present application provides a battery module, which is composed of a plurality of square battery cells arranged in an array, wherein two adjacent battery cells form a battery cell unit, and the positive electrodes and negative electrodes on the two battery cells in the same battery cell unit are respectively located on the same side; the positive electrodes and negative electrodes on the two adjacent battery cell units are arranged oppositely;

[0012] The battery module comprises a parallel row, a first connecting row and a second connecting row, wherein the first connecting row is used to be arranged on the positive electrodes of the two battery cells in the battery cell unit, and the second connecting row is used to be arranged on the negative electrodes of the two battery cells in the battery cell unit; the first connecting row and the second connecting row are both provided with connecting ears for connecting with the parallel row, and the connecting ears on the first connecting row and the connecting ears on the second connecting row in the same battery cell unit are arranged facing each other;

[0013] The parallel row is used to selectively connect to the first connection row or the second connection row in two adjacent battery core units.

[0014] In this way, there is no need to disassemble the module into battery cells and then reassemble them, avoiding the risk of damaging the battery cells during the disassembly and assembly process. The number of series and parallel connections of the original module can be changed by simply adjusting the connection row on the module, effectively saving a lot of modification time and modification costs, thereby ensuring the versatility of the battery module.

[0015] In one embodiment, the battery module also includes a series connection row, which is formed by integrally connecting the first connection row and the second connection row that are adjacent to each other, so that adjacent battery cell units can be connected in series with each other, thereby increasing the battery cell connection combination methods in the battery module and improving the connection flexibility between battery cells.

[0016] In one embodiment, the parallel row includes a straight row and a concave row, the concave row has a concave portion, and the concave row crosses and overlaps with the straight row through the concave portion; the battery module also includes an insulating plate, and the insulating plate is arranged between the straight row and the concave row to play a blocking and insulating role to avoid mutual interference between the cross-overlapping straight row and the concave row.

[0017] In a second aspect, the present application provides a battery box, comprising a box body and the battery module, wherein the box body comprises a bottom plate and four side plates, the battery module is arranged on the bottom plate, and the four side plates are respectively detachably arranged on the bottom plate. In this way, the size of the bottom plate and the side plates on the four sides of the box body can be adjusted separately according to the number or size of the battery modules arranged, so as not to affect the compatibility with other components.

[0018] In one embodiment, the two ends of the battery module are respectively provided with end plates, the bottom plate of the box body is provided with a positioning piece for limiting the installation position of the battery module, and the positioning piece is installed and connected with the end plate. In this way, when the size of the battery module changes, only the positioning piece that meets the size needs to be replaced, and other structural parts do not need to be changed, so that efficient adaptation can be achieved, thereby improving versatility.

[0019] In one embodiment, the positioning member includes three frames and a concave plate connected to the three frames, and the concave plate is provided with a first mounting hole; the two sides of the end plate are respectively provided with connecting blocks, and the connecting blocks are provided with screw holes corresponding to the positions of the first mounting holes, so as to install fasteners such as screws for threading and fixing. When the battery cell model in the battery module changes, or the size of other structural parts on the battery module changes slightly, it is only necessary to adjust the size of the three frames and / or the concave plate of the positioning member to achieve efficient adaptation without adjusting other structural parts.

[0020] In one embodiment, the box is provided with a plurality of boxes, and the plurality of boxes are stacked up and down; the battery box further comprises a top cover and a plurality of fixing strips, the top cover is covered on the topmost box, and a detachable control panel is provided on the top cover; each of the fixing strips is fixed to the side panels of the plurality of boxes respectively and simultaneously. Only the partial structure on the bottom surface of each box for setting the battery module may differ, and the side panels on the four sides of the box are universal. Adjacent boxes can be fixed by fasteners such as screws, and can be easily disassembled, replaced and assembled, effectively improving versatility.

[0021] In one embodiment, the battery box also includes a third connecting row, and two adjacent boxes are respectively provided with adjacent wire holes. The third connecting row is connected to the battery modules inside the two adjacent boxes through the wire holes, so that the battery modules in each box are connected in series.

[0022] In a third aspect, the present application provides a weight balancing device, comprising a container and the battery box, wherein the battery box is disposed in the container, and a weight balancing block is disposed between the outer wall of the battery box and the inner wall of the container. Preferably, weight balancing blocks are disposed on opposite sides of the battery box to improve the balance of the weight balancing device.

[0023] In one embodiment, a limit member for fixing the counterweight block is further provided in the container, the limit member is fixed on the counterweight block, one end of the limit member is installed and connected to the inner wall of the container, and a buckle plate is provided on the other end of the limit member, the buckle plate is abutted against the outer wall of the battery box and buckled on the counterweight block, thereby fixing the counterweight block between the battery box and the inner wall of the container.

[0024] The beneficial effects of the battery module, battery box and counterweight device provided by the present application are: compared with the prior art, the battery module, battery box and the battery box are installed on a specific carrier with universal design in mind, which changes the structure of the integrated design of the main structural parts of the traditional power battery, and innovatively splits a single structural part into multiple modular structural parts that are compatible with each other and can be independently changed under certain conditions. The more dispersed, independent and replaceable structural parts are combined into a whole, thereby having higher flexibility, adaptability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A top view of the battery module provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the explosion structure of a battery module provided in an embodiment of the present application;

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the battery module provided in the embodiment of the present application Figure 1 ;

[0029] Figure 4 A schematic diagram of a parallel three-dimensional structure provided in an embodiment of the present application;

[0030] Figure 5 Schematic diagram of the three-dimensional structure of the battery module provided in the embodiment of the present application Figure 2 ;

[0031] Figure 6 A schematic diagram of the three-dimensional structure of a battery box provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the explosion structure of a battery box provided in an embodiment of the present application;

[0033] Figure 8 The assembly structure of the battery module and the bottom plate in the battery box provided in the embodiment of the present application Figure 1 ;

[0034] Fig. 9 The assembly structure of the battery module and the bottom plate in the battery box provided in the embodiment of the present application Figure 2 ;

[0035] Fig.10 A schematic diagram of the three-dimensional structure of a positioning member provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of an exploded structure of a battery box with two layers of boxes provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the assembly structure of the control panel on the battery box provided in an embodiment of the present application;

[0038] Fig.13A schematic diagram of the three-dimensional structure of a counterweight device provided in an embodiment of the present application;

[0039] Fig.14 A schematic diagram of the explosion structure of the counterweight device provided in an embodiment of the present application;

[0040] Fig.15 A schematic diagram of the assembly structure of the counterweight block and the limiting member provided in an embodiment of the present application.

[0041] Among them, the reference numerals in the figure are:

[0042] 100-battery module; 101-battery cell; 102-battery cell unit;

[0043] 200-battery box;

[0044] 300-Counterweight device;

[0045] 1-first connecting row; 11-first connecting ear;

[0046] 2-second connecting row; 21-second connecting ear;

[0047] 3-parallel row; 31-straight row; 32-concave row; 321-concave;

[0048] 4-tandem rows;

[0049] 5-Insulation board;

[0050] 6-box; 61-bottom plate; 62-side plate; 621-first side plate; 622-second side plate; 623-fixing hole; 624-wire hole;

[0051] 63-positioning member; 631-three frames; 632-concave plate; 633-first mounting hole;

[0052] 64-top cover; 641-control panel;

[0053] 65-fixing bar; 651-second mounting hole;

[0054] 66-third connecting row;

[0055] 7-end plate; 71-enclosure plate; 72-connection block; 721-screw hole; 73-total positive electrode; 74-total negative electrode; 75-weight reduction hole;

[0056] 8-container; 80-gap; 81-weight block; 811-third mounting hole; 82-hanging hole;

[0057] 9-limiting member; 91-through hole; 92-gusset plate; 93-reinforcement plate. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0059] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0060] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as a limitation on the present application.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] The industry generally designs the structure of battery packs independently according to the technical requirements and optional materials of various models, resulting in the commonality of the main structural parts on the battery pack with other models of battery packs. The degree of integration is high, and when the basic materials such as the battery cell are changed, the material commonality of the original structural parts is low and cannot be used interchangeably.

[0063] In view of the above situation, the inventor has conducted painstaking research and considered the universal design of battery modules, battery boxes assembled with battery modules, and battery boxes on specific carriers, and creatively proposed a new type of battery module, battery box and counterweight device to solve the technical problem that the structural parts on traditional battery packs have a high degree of integration and are difficult to use universally. They are now described in detail.

[0064] In the first embodiment of the present application, the battery module is improved, and square cells of commonly used specifications in the industry are used for versatility. It should be noted that since the battery module composed of cells has various forms, as an example, the embodiment of the present application is a special case of changing the original 2-parallel 8-series module to a 4-parallel 4-series module by changing the connection order of the original connection row.

[0065] Please also read Figure 1 and Figure 2 ( Figure 1 The + sign in the figure is the connection part on the positive electrode, and the - sign is the connection part on the negative electrode). The battery module 100 is mainly composed of a plurality of square cells 101 arranged in an array. Two adjacent cells 101 form a cell unit 102. The positive electrodes and negative electrodes on the two cells 101 in the same cell unit 102 are respectively located on the same side. The positive electrodes and negative electrodes on the two adjacent cell units 102 are arranged opposite to each other.

[0066] like Figure 1 and Figure 2 As shown, the battery module 100 includes a first connection row 1, a second connection row 2 and a parallel row 3. The first connection row 1 is used to be arranged on the positive electrodes of the two battery cells 101 in the battery cell unit 102, and the second connection row 2 is used to be arranged on the negative electrodes of the two battery cells 101 in the battery cell unit 102. The first connection row 1 and the second connection row 2 are both provided with connection ears for connecting with the parallel row 3, and the first connection ear 11 on the first connection row 1 and the second connection ear 21 on the second connection row 2 in the same battery cell unit 102 are arranged facing each other.

[0067] The parallel row 3 is used to selectively connect to the first connection row 1 or the second connection row 2 in two adjacent battery cell units 102 .

[0068] Compared with the prior art, the battery module 100 provided in the embodiment of the present application does not need to be disassembled into battery cells 101 and then reassembled. The number of series and parallel connections of the original module can be changed by only milling off the original connection rows on the module and re-soldering them, which effectively saves a lot of modification time and modification costs, and avoids the risk of damage to the battery cells 101 during the process of disassembling and assembling the module.

[0069] The battery module 100 of the present application only changes the connection order of the connection rows between the battery cells 101 on the original module. The fixing structure on the battery module 100 for fixing on the battery box does not change. The fixing structural parts on the original battery module 100 can be used to fix the battery module 100 on the battery box.

[0070] By adopting the connection row connection structure on the battery module 100 of the present application, this type of battery module 100 can also be changed into modules with other series or parallel numbers, effectively improving the versatility of the battery module 100.

[0071] Please also read Figure 2 and Figure 3 The battery module 100 also includes a series row 4, which is formed by integrally connecting a first connection row 1 and a second connection row 2 adjacent to each other, so that adjacent battery cell units 102 can be connected in series with each other, thereby increasing the connection combination mode of the battery cells 101 in the battery module 100 and improving the connection flexibility between the battery cells 101.

[0072] In this embodiment, if Figure 3 As shown, the first connection ear 11 on the first connection row 1 and the second connection ear 21 on the second connection row 2 are arranged close together, that is, the two adjacent connection ears are close to each other. In other embodiments (not shown), the first connection ear 11 on the first connection row 1 and the second connection ear 21 on the second connection row 2 can also be separated, that is, the two adjacent connection ears are far away from each other. It can be seen that the connection ears on the two connection rows in the series row 4 can be arranged close together or separately according to actual use conditions, and are not specifically limited here.

[0073] Please also read Figure 1 , Figure 2 and Figure 4 The parallel row 3 includes a straight row 31 and a concave row 32. The concave row 32 has a concave portion 321. The concave row 32 crosses and overlaps with the straight row 31 through the concave portion 321. The concave row 32 can be formed by bending the straight row 31 to form a concave structure, so that the concave row 32 has the concave portion 321, thereby reducing the production cost.

[0074] The recessed portion 321 on the concave row 32 is conducive to space avoidance, so that the straight row 31 and the concave row 32 can cross and overlap in the same space, so that each straight row 31 and each concave row 32 can form a group of connection units connected between the connection rows on both sides, thereby improving the connection flexibility between the battery cells 101.

[0075] In addition to the above, please also refer to Figure 3 and Figure 5 The battery module 100 also includes an insulating plate 5, which is disposed between the upper and lower positions of the straight line row 31 and the concave row 32 to play a role of blocking and insulating to prevent the crossed and overlapped straight line row 31 and concave row 32 from interfering with each other.

[0076] In this embodiment, the insulating plate 5 is a slat structure, and the length of the insulating plate 5 is similar to the sum of the thicknesses of the plurality of square cells 101 after being arranged, so as to ensure the coverage of the insulating plate 5. The insulating plate 5 is disposed between the positive and negative electrodes on the same end surface of the plurality of square cells 101, and is simultaneously embedded in the concave portions 321 of the plurality of concave rows 32, so as to save space.

[0077] In the second embodiment of the present application, a universal design is made for the structure of installing the battery module 100 in the battery box 200. Figure 6 and Figure 7 The battery box 200 includes a rectangular box body 6 and the above-mentioned battery module 100. The box body 6 includes at least a bottom plate 61 and four side plates 62. One or more battery modules 100 can be arranged in an array on the bottom plate 61. The side plates 62 on the four sides of the box body 6 are respectively and detachably arranged on the four side edges of the bottom plate 61, thereby circumferentially surrounding the battery module 100.

[0078] In this way, the size of the bottom plate 61 and the side plates 62 on the four sides of the box body 6 can be adjusted according to the number or size of the battery modules 100. The main structural parts of the battery box 200, such as the battery module 100, the bottom plate 61, and the side plates 62, are arranged separately, and the size of each structural part can be changed independently without affecting the compatibility with other parts, thereby improving the versatility of the structural parts in the battery box 200 and effectively solving the versatility and adaptability problems of the structural parts of battery packs of different models and versions.

[0079] like Figure 7 As shown, the box body 6 in this embodiment can be divided into three parts: a bottom plate 61, two first side plates 621, and two second side plates 622. Among them, the first side plate 621 can be a plate on the long side of the box body 6, and the second side plate 622 can be a plate on the wide side of the box body 6. A total of five structural parts constitute a modular box structure, and the five structural parts can be cut according to size requirements to obtain suitable sizes for individual adjustment, thereby improving adaptability.

[0080] Please also read Figure 2 , Figure 3 and Figure 5 End plates 7 are respectively provided at both ends of the battery module 100 , and a plurality of battery cells 101 are arranged between the end plates 7 at both ends in the length direction of the battery module 100 .

[0081] like Figure 2 As shown, enclosures 71 are provided on both sides of the multiple battery cells 101 , and the two ends of the enclosure 71 are respectively connected to the end plates 7 at both ends of the battery module 100 , thereby forming a surrounding structure for the multiple battery cells 101 to ensure protection and insulation of the battery cells 101 .

[0082] Please also read Figure 8 and Fig. 9 The bottom plate 61 is provided with positioning members 63 for defining the installation position of the battery module 100, and the positioning members 63 are respectively installed and connected to the end plates 7 at both ends of the battery module 100. In this embodiment, one or more installation positions for the array battery module 100 can be set on the bottom plate 61, and every two positioning members 63 arranged opposite to each other define the installation position of a battery module 100 on the bottom plate 61.

[0083] Therefore, when the size of the battery module 100 changes, only the positioning member 63 that matches the size needs to be replaced, and other structural members such as the bottom plate 61 and the side plates 62 on the four sides of the box body 6 do not need to be modified, thereby achieving efficient adaptation and improving versatility.

[0084] For the structure of the positioning member 63, please refer to Fig. 9 and Fig.10 The positioning member 63 can preferably be a sheet metal member made of sheet metal material, and the positioning member 63 includes three side frames 631 and a concave plate 632 connected to the three side frames 631, and a first mounting hole 633 is provided on the concave plate 632. The three side frames 631 and the concave plate 632 of the positioning member 63 are manufactured and formed separately, so that the three side frames 631 and the concave plate 632 can be replaced or directly cut and adjusted according to size requirements.

[0085] Correspondingly, symmetrically arranged connecting blocks 72 are respectively provided on both sides of the end plate 7. The connecting blocks 72 are provided with screw holes 721, which correspond to the positions of the first mounting holes 633 on the positioning member 63 so as to be installed with fasteners such as screws for threading and fixing.

[0086] When the model of the battery cell 101 in the battery module 100 changes, or the size of other structural parts on the battery module 100 changes slightly, it is only necessary to adjust the size of the three sides 631 and / or the concave plate 632 of the positioning member 63 to achieve efficient adaptation without adjusting other structural parts.

[0087] Therefore, in practical application, Figure 6 , Figure 7 and Figure 8 As shown, when the height change of the battery module 100 exceeds the redundant range, it is only necessary to adjust the width dimensions of the first side plate 621 and the second side plate 622 to adapt, and other structural parts such as the bottom plate 61 can be used universally without adjustment.

[0088] When the width of the battery module 100 changes beyond the redundant range, only the width dimensions of the first side plate 621 (or the positioning member 63) and the bottom plate 61 need to be adjusted to adapt, and other structural members such as the second side plate 622 can be used universally without adjustment.

[0089] When the length of the battery module 100 changes beyond the redundant range, only the width of the second side plate 622 (or the positioning member 63) and the bottom plate 61 need to be adjusted to adapt, and other structural parts such as the first side plate 621 can be used universally without adjustment.

[0090] Therefore, by adjusting a few structural parts, while maintaining the commonality of most structural parts, universal adaptation to various battery cells 101 and battery modules 100 is achieved, which is conducive to reuse.

[0091] In this embodiment, if Figure 3 As shown, the end plates 7 at both ends of the battery module 100 are respectively provided with a total positive electrode 73 and a total negative electrode 74 for external connection of the entire battery module 100, so as to be connected to an external connection bar to achieve electrical connection with other modules or electrical components.

[0092] Preferably, if Figure 5 As shown, weight-reducing holes 75 are provided on the end plates 7 at both ends of the battery module 100 . A plurality of weight-reducing holes 75 are arranged in a grid on the outer side of the end plates 7 to achieve a weight-reducing effect.

[0093] In the battery box 200 of the present application, the battery box 200 can also be divided into a single-layer, double-layer or multi-layer box structure according to actual conditions such as voltage capacity requirements and external size restrictions. Each layer of the box 6 can place a PDU and one or more battery modules 100 as needed. These battery modules 100 can be battery modules 100 composed of the same or different battery cells.

[0094] As an example, see also Figure 7 and Fig.11 Taking a certain type of 80V forklift power battery as an example, the battery box 200 adopts a double-layer box structure, and the battery box 200 includes two boxes 6 stacked up and down. Among them, the lower box can hold three 4-in-4 battery modules 100, and the upper box can hold two 4-in-4 battery modules 100 and one 4-in-2 battery module 100 and a PDU.

[0095] The upper and lower boxes can be fixed by fasteners such as screws, and can be easily disassembled, replaced, and assembled. The upper and lower boxes may differ only in the structure of the bottom plate 61 surface for setting the battery module 100, and the side plates 62 on the other four sides are universal.

[0096] like Fig.11As shown, the battery box 200 further includes a top cover 64 and a plurality of fixing strips 65, and the top cover 64 covers the topmost box body 6. In this embodiment, since the box body 6 is a box structure with an upper opening composed of a bottom plate 61 and four side plates 62, and the upper box body is stacked on the lower box body, the top cover 64 only needs to cover the upper opening of the upper box body to close the entire battery box 200.

[0097] Please also read Fig.11 and Fig.12 A detachable control panel 641 is provided on the top cover 64, so that the control panel 641 can be removed separately without removing the top cover 64, and the opening M installed on the control panel 641 can be used as an inspection window to inspect the PDU part inside the battery box 200.

[0098] Each fixing strip 65 is fixed to the side panels 62 of the upper box and the lower box respectively. Fig.11 As shown, the upper and lower side panels 62 are provided with corresponding fixing holes 623, and the fixing strip 65 is provided with a second mounting hole 651, which can be fixed by installing fasteners such as screws. In this embodiment, two fixing strips 65 are provided on opposite sides of the upper and lower boxes to ensure overall balance.

[0099] Preferably, each fixing bar 65 is provided with a hanging screw (not shown) on the top to facilitate hanging during transportation. When installed on a carrier such as a counterweight device, the hanging screw can be removed and fixed to the actual carrier by passing fasteners such as screws through the fixing bar 65, thereby effectively improving installation flexibility.

[0100] In addition, in addition to connecting and fixing the upper and lower boxes, the fixing strip 65 can also serve as an installation guide when installed on a carrier such as a counterweight device, which is beneficial for guiding and aligning during the installation process.

[0101] In this example, see Fig.11 The battery box 200 also includes a third connecting row 66. The side panels 62 of the two adjacent boxes 6 are respectively provided with adjacent wire holes 624. The third connecting row 66 is connected to the battery modules 100 inside the two adjacent boxes 6 through the wire holes 624, so that the battery modules 100 in each box 6 are connected in series.

[0102] In the third embodiment of the present application, for application scenarios with weight requirements such as forklifts and logistics vehicle power batteries, the battery box 200 can be placed in a weight balancing device 300 that meets the corresponding requirements according to the weight and size requirements.

[0103] Please also read Fig.13 and Fig.14 The counterweight device 300 includes a container 8 and the above-mentioned battery box 200. The container 8 can preferably be a box structure with an upper opening. The battery box 200 is arranged in the container 8 and is sealed with a cover plate.

[0104] The outer wall of the battery box 200 and the inner wall of the container 8 are spaced apart to form a gap 80 around the outer circumference of the battery box 200 inside the container 8, and a counterweight 81 can be selectively arranged in the gap 80. The "selective" here means that the counterweight 81 can be added to any part of the gap 80, for example: the counterweight 81 can be arranged on opposite sides of the battery box 200 for balance consideration; or, a circle of counterweights 81 can be arranged on the outer circumference of the entire battery box 200. The arrangement of the counterweight 81 in the gap 80 can be arranged in accordance with the actual use requirements, and is not specifically limited here.

[0105] Preferably, a lifting hole 82 may be provided on the side wall of the container 8, and the lifting hole 82 may be used for overall lifting when the container 8 is installed on a vehicle.

[0106] When the battery box 200 needs to be returned to the factory for repair, the battery box 200 can be removed alone without the need to transport the heavy counterweight device 300 together, which effectively reduces the requirements for on-site lifting equipment and saves transportation costs.

[0107] The counterweight block 81 can be fixed in a separate manner or welded to the container 8. In this embodiment, a separate installation structure is preferably adopted. Fig.14 and Fig.15 A stopper 9 for fixing the counterweight 81 is also provided in the container 8, and the stopper 9 is fixed on the top of the counterweight 81. Specifically, a third mounting hole 811 is provided on the top surface of the counterweight 81, and a through hole 91 is provided on the stopper 9 for fasteners such as screws to pass through and fix.

[0108] One end of the limiting member 9 is connected to the inner wall of the container 8, and can be fixed by perforation using fasteners such as screws, or by snap-fitting, which is not specifically limited here.

[0109] A buckle plate 92 is provided on the other end of the limiting member 9 , which abuts against the outer wall of the battery box 200 and is buckled on the side wall of the counterweight block 81 , thereby fixing the counterweight block 81 between the battery box 200 and the inner wall of the container 8 .

[0110] Preferably, if Fig.15 As shown, triangular reinforcing plates 93 are provided on both sides of the limiting member 9 to improve the structural strength of the limiting member 9 .

[0111] In summary, the battery module 100, battery box 200 and weight counterweight device 300 of the present application have the following advantages:

[0112] (1) The main structural parts of the battery are highly versatile and can be used in batteries of different specifications and models, thus reducing inventory and supply chain pressures;

[0113] (2) The main structural parts of the battery adopt a split design. When the design is partially changed, only a few parts are affected, and the other parts can still be used in common;

[0114] (3) After the battery is put into use, when some of the battery cells 101 have uneven life spans and need to be replaced, battery cells 101 and battery modules 100 of different sizes can be mixed in the same battery pack at a lower cost and time;

[0115] (4) The processing complexity of a single part is lower and the adaptability requirements are less, which improves the part yield and thus reduces production costs;

[0116] (5) When the battery cell 101 in the battery reaches the retirement and scrap age and cannot be reassembled using the same battery cell 101, the structural parts that are still within the service life can be recycled and reused without having to be scrapped together with the original battery cell 101, electrical parts, etc.

[0117] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery module, composed of a plurality of square cells arranged in an array, characterized in that: Two adjacent battery cells form a battery cell unit, and the positive electrodes and negative electrodes on the two battery cells in the same battery cell unit are respectively located on the same side; the positive electrodes and negative electrodes on the two adjacent battery cell units are arranged oppositely; The battery module comprises a parallel row, a first connecting row and a second connecting row, wherein the first connecting row is used to be arranged on the positive electrodes of the two battery cells in the battery cell unit, and the second connecting row is used to be arranged on the negative electrodes of the two battery cells in the battery cell unit; the first connecting row and the second connecting row are both provided with connecting ears for connecting with the parallel row, and the connecting ears on the first connecting row and the connecting ears on the second connecting row in the same battery cell unit are arranged facing each other; The parallel row is used to selectively connect to the first connection row or the second connection row in two adjacent battery core units.

2. The battery module according to claim 1, characterized in that: The battery module further includes a series connection row, and the series connection row is formed by integrally connecting the first connection row and the second connection row that are adjacent to each other.

3. The battery module according to claim 1, characterized in that: The parallel row includes a straight row and a concave row, the concave row has a concave portion, and the concave row crosses and overlaps with the straight row through the concave portion; the battery module also includes an insulating plate, and the insulating plate is arranged between the straight row and the concave row.

4. A battery box, characterized in that: It comprises a box body and a battery module as claimed in any one of claims 1 to 3, wherein the box body comprises a bottom plate and four side plates, the battery module is arranged on the bottom plate, and the four side plates are respectively detachably arranged on the bottom plate.

5. The battery box according to claim 4, characterized in that: End plates are respectively arranged at both ends of the battery module, and a positioning piece for limiting the installation position of the battery module is arranged on the bottom plate of the box body, and the positioning piece is installed and connected with the end plates.

6. The battery box according to claim 5, characterized in that: The positioning member includes three side frames and a concave plate connected to the three side frames, and the concave plate is provided with a first mounting hole; connecting blocks are respectively provided on both sides of the end plate, and screw holes corresponding to the positions of the first mounting holes are provided on the connecting blocks.

7. The battery box according to claim 4, characterized in that: There are multiple boxes, which are stacked up and down; the battery box also includes a top cover and multiple fixing strips, the top cover is covered on the topmost box, and a detachable control panel is provided on the top cover; each of the fixing strips is fixed to the side panels of the multiple boxes respectively and simultaneously.

8. The battery box according to claim 7, characterized in that: The battery box also includes a third connection row. Two adjacent boxes are respectively provided with adjacent wire holes. The third connection row is connected to the battery modules inside the two adjacent boxes through the wire holes.

9. A counterweight device, characterized in that: It comprises a container and a battery box as claimed in any one of claims 4 to 8, wherein the battery box is arranged in the container, and a counterweight block is provided between the outer wall of the battery box and the inner wall of the container.

10. The counterweight device according to claim 9, characterized in that: A limit piece for fixing the counterweight block is also provided in the container. The limit piece is fixed on the counterweight block. One end of the limit piece is installed and connected to the inner wall of the container. A buckle plate is provided on the other end of the limit piece. The buckle plate is abutted against the outer wall of the battery box and buckled on the counterweight block.

Images