Battery module and battery pack

Abstract

The utility model discloses a battery module. The battery module comprises a positive pole fixing bracket, a negative pole fixing bracket, at least one battery pack and at least one end part fixing piece, the battery pack comprises a plurality of cylindrical single batteries which are sequentially connected in series, at least one of the positive pole fixing bracket and the negative pole fixing bracket is provided with a multilateral mounting hole, the positive pole end of the battery pack is arranged on the positive pole fixing bracket, and the negative pole end of the battery pack is arranged on the negative pole fixing bracket; the end fixing piece is provided with a polygonal part matched with the polygonal mounting hole, the end fixing piece is arranged at the end of the battery pack in a sleeving mode, and the polygonal part is embedded in the polygonal mounting hole. The problem that a cylindrical battery circumferentially rotates on a fixing support is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially relates to a battery module and battery package. BACKGROUND

[0002] Battery as energy storage carrier is widely used in each field, and the existing battery package usually includes a shell and a battery module arranged in the shell. In particular, in the battery module composed of cylindrical batteries, the battery module usually includes a plurality of single batteries connected in sequence, and a group of battery packs is formed by a row of battery cells connected in sequence. Fixed supports are arranged at least at the two ends of the battery pack along the axial direction of the battery pack. The two ends of the battery pack are directly inserted into the mounting holes of the fixed supports.

[0003] Because the single battery of the battery pack is a cylindrical structure, the battery pack inserted into the mounting hole is prone to rotation, thereby causing the problem of low installation stability. UTILITY MODEL CONTENTS

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a battery module and a battery package to solve the problem of circumferential rotation of cylindrical batteries on the fixed support.

[0005] A battery module includes a positive fixed support, a negative fixed support, at least one group of battery packs, and at least one end fixed part.

[0006] The battery pack includes a plurality of cylindrical single batteries connected in sequence. At least one of the positive fixed support and the negative fixed support is provided with a multi-edge mounting hole. The positive end of the battery pack is arranged on the positive fixed support, and the negative end of the battery pack is arranged on the negative fixed support.

[0007] The end fixed part is provided with a multi-edge part matched with the multi-edge mounting hole. The end fixed part is sleeved on the end of the battery pack, and the multi-edge part is embedded in the multi-edge mounting hole.

[0008] Further, the end fixed part is arranged at the positive end of the battery pack. The positive fixed support is provided with at least one multi-edge mounting hole. The negative fixed support is provided with at least one support mounting hole.

[0009] The end fixed part of the positive end is inserted into the multi-edge mounting hole of the positive fixed support, and the negative end of the battery pack is inserted into the support mounting hole of the negative fixed support.

[0010] Further, the two opposite outer side walls of the positive fixed support are defined as positive fixed side surfaces, and at least one positive fixed block is arranged on the positive fixed side surface.

[0011] Or, two opposite outer side walls of the positive electrode fixed support are defined as positive electrode fixed side surfaces, at least one positive electrode fixed block is arranged on the positive electrode fixed side surfaces, two opposite outer side walls of one of the negative electrode fixed supports are defined as negative electrode fixed side surfaces, and at least one negative electrode fixed block is arranged on one of the negative electrode fixed side surfaces.

[0012] Or, the intermediate fixed support is further arranged with a middle mounting hole, and the middle part of the group of battery groups is arranged to pass through the middle mounting hole.

[0013] Two opposite outer side walls of the positive electrode fixed support are defined as positive electrode fixed side surfaces, at least one positive electrode fixed block is arranged on the positive electrode fixed side surfaces, two opposite outer side walls of one of the negative electrode fixed supports are defined as negative electrode fixed side surfaces, and at least one negative electrode fixed block is arranged on one of the negative electrode fixed side surfaces, two opposite outer side walls of the intermediate fixed support are defined as intermediate fixed side surfaces, and at least one intermediate fixed block is arranged on the intermediate fixed side surfaces.

[0014] Further, the positive electrode fixed support is arranged with at least one positive electrode heat dissipation channel.

[0015] Or, the positive electrode fixed support is arranged with at least one positive electrode heat dissipation channel, and the negative electrode fixed support is arranged with at least one negative electrode heat dissipation channel.

[0016] Along the axial direction of the group of battery groups, one of the positive electrode heat dissipation channels and one of the negative electrode heat dissipation channels are arranged in alignment.

[0017] Or, one of the positive electrode fixed supports is arranged with at least one positive electrode heat dissipation channel, one of the negative electrode fixed supports is arranged with at least one negative electrode heat dissipation channel, and one of the intermediate fixed supports is arranged with at least one intermediate heat dissipation channel, and along the axial direction of the battery groups, the positive electrode heat dissipation channel, the negative electrode heat dissipation channel, and the intermediate heat dissipation channel are arranged in alignment.

[0018] Further, two opposite outer side walls of one of the intermediate fixed supports are defined as intermediate fixed side surfaces, at least one first connecting part is arranged on the intermediate fixed support, and a second connecting part is adapted to the first connecting part.

[0019] The second connecting part and at least one of the first connecting parts are respectively arranged at one end of the intermediate fixed side surface.

[0020] Further, the end fixed part is screwed to the positive electrode end and / or the negative electrode end of the battery group.

[0021] A battery pack, comprising a shell and the battery module according to any one of the preceding claims.

[0022] The housing includes a top cover and a body, the battery module is placed in the body, and the top cover is closed onto the body.

[0023] Furthermore, it also includes a cooling fan along the axial direction of the battery pack, the cooling fan being disposed at the end of the battery module to guide heat dissipation in the axial direction of the battery pack;

[0024] Along the axial direction of the battery module, an air outlet is provided on the side plate at at least one end of the main body.

[0025] Furthermore, a first positioning part is provided at the inner bottom of the housing, and the bottom of the battery module is positioned and installed on the first positioning part;

[0026] And / or, a second positioning part is provided on one side of the top cover, and when the top cover is closed on the body, the second positioning part is engaged and positioned on the top of the battery module.

[0027] Furthermore, it also includes conductive connecting pieces;

[0028] The number of battery modules is multiple, and the conductive connecting piece is used to interconnect the positive electrodes of the multiple battery modules and to interconnect the negative electrodes of the multiple battery modules.

[0029] In summary, the battery module and battery pack provided by this utility model have the following technical effects:

[0030] The battery pack is connected to the multi-sided mounting holes on the end fixing parts. The multi-sided connection method simply and effectively restricts the rotation of the battery pack, improves the stability of the battery pack installation in the battery module, avoids problems such as falling or circuit breakage caused by the displacement of the battery pack during use, and improves the safety of the battery pack. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a single battery module according to an embodiment of the present invention;

[0032] Figure 2 This is an exploded view of a single battery module according to an embodiment of the present invention;

[0033] Figure 3 for Figure 2 A schematic diagram of the positive electrode fixing bracket;

[0034] Figure 4 for Figure 2 A schematic diagram of the negative electrode fixing bracket;

[0035] Figure 5 for Figure 2 A schematic diagram of the structure of the intermediate fixed bracket;

[0036] Figure 6 for Figure 5 enlarged view of part A;

[0037] Figure 7 for Figure 5 enlarged view of part B;

[0038] Figure 8 for Figure 2 structure diagram of end fixing member;

[0039] Figure 9 for Figure 2 structure diagram of stringing member;

[0040] Figure 10 for first structure diagram of multiple battery modules of the embodiment of the utility model;

[0041] Figure 11 for second structure diagram of multiple battery modules of the embodiment of the utility model;

[0042] Figure 12 for assembly structure diagram of battery module and cooling fan of the embodiment of the utility model;

[0043] Figure 13 for structure diagram of battery pack of the embodiment of the utility model;

[0044] Figure 14 for explosion diagram of battery pack of the embodiment of the utility model.

[0045] Among them, the meaning of the reference sign is as follows:

[0046] 10, battery pack; 11, cylindrical single battery; 20, positive electrode fixed support; 21, multiple edge mounting hole; 22, positive electrode fixed block; 23, positive electrode heat dissipation channel; 30, negative electrode fixed support; 31, support mounting hole; 32, negative electrode fixed block; 33, negative electrode heat dissipation channel; 40, end fixing member; 41, plug-in protrusion; 42, base; 50, intermediate fixed support; 51, middle mounting hole; 52, intermediate fixed block; 53, intermediate heat dissipation channel; 54, first connecting part; 55, second connecting part; 60, shell; 61, top cover; 62, body; 621, air outlet; 70, stringing member; 80, cooling fan; 90, positive electrode terminal post; 12, negative electrode terminal post; 13, conductive connecting piece; 14, power port. DETAILED DESCRIPTION

[0047] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below by combining the drawings in the embodiment of the utility model.

[0048] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0050] The battery pack provides the functions of storing electric energy and supplying power supply power in electronic equipment. It is usually formed by connecting one or more battery modules, and a battery module is composed of a plurality of battery monomers in series or parallel connection to meet the demand of the equipment for electric quantity and voltage. In addition, the battery pack also includes a battery management system (BMS) connected with the battery, which is used to monitor the state of the battery and ensure the safety of the battery pack.

[0051] Referring to Figure 1 and Figure 2 The utility model discloses a kind of battery module, including positive fixed support 20, negative fixed support 30, at least one group battery 10 and at least one end fixed part 40;Battery 10 includes a plurality of sequentially connected cylindrical monomer battery 11, and the at least one of positive fixed support 20 and negative fixed support 30 is provided with polygon mounting hole 21, and the positive end of battery 10 is arranged in positive fixed support 20, and the negative end of battery 10 is arranged in negative fixed support 30;End fixed part 40 is provided with polygonal part adapted to polygon mounting hole 21, and end fixed part 40 is sleeved on the end of battery, and polygonal part is embedded in polygon mounting hole 21.

[0052] Among them, five cylindrical monomer batteries 11 are included in single battery 10, and five cylindrical monomer batteries 11 are sequentially connected to form a battery 10, and the cylindrical monomer batteries 11 can be connected by welding or the like.

[0053] Positive fixed support 20 and negative fixed support 30 are preferably square plates, and positive fixed support 20 is preferably provided with a through-type polygon mounting hole 21 at the center position, and negative fixed support 30 is preferably provided with a through-type support mounting hole 31 at the center position. In particular, polygon mounting hole 21 can be selected as a three-edge hole, a four-edge hole and the like, and the polygon mounting hole 21 of the embodiment is a regular hexagonal hole, and the support mounting hole 31 is selected as a circular hole.

[0054] Referring to Figure 8 Correspondingly, the end fixing member 40 comprises a hexagonal insertion protrusion 41 matched with the multi-sided mounting hole 21, the insertion protrusion 41 protrudes from the positive end of the battery pack 10, and during assembly, the insertion protrusion 41 is inserted into the multi-sided mounting hole 21, and the last cylindrical single battery 11 at the other end of the battery pack 10 is inserted into the support mounting hole 31. In this way, after the insertion protrusion 41 and the multi-sided mounting hole 21 are inserted, the insertion protrusion 41 cannot rotate in the multi-sided mounting hole 21, thereby avoiding the circumferential rotation of the battery pack 10.

[0055] Other realizable modes further include, first, the positive fixed support 20 is provided with the support mounting hole 31, the negative fixed support 30 is provided with the multi-sided mounting hole 21, and the corresponding end fixing member 40 is arranged at the negative end of the battery pack 10. Second, the positive fixed support 20 and the negative fixed support 30 are both provided with the multi-sided mounting hole 21, and the corresponding positive end and negative end of the battery pack 10 are respectively provided with the end fixing member 40.

[0056] In the above, the battery pack 10 is circumferentially limited, and the embodiment further adds the limitation of the axis. Specifically, the support mounting hole 31 is provided as a stepped hole, and the cylindrical single battery 11 at the negative position of the battery pack 10 is inserted into the hole with a large radius of the support mounting hole 31, and the end thereof abuts against the stepped surface. The multi-sided mounting hole 21 itself has the function of axial limitation, and one end of the multi-sided mounting hole 21 is provided with a circular hole, which is used for the insertion of the cylindrical single battery 11 at the positive position of the battery pack 10, thereby providing safe support for the cylindrical single battery 11 at the positive position of the battery pack 10.

[0057] In addition, in order to facilitate the connection of the insertion protrusion 41 and the cylindrical single battery 11, the end fixing member 40 further comprises a base 42, the insertion protrusion 41 is connected to one end of the base 42, the base 42 is provided with external threads, and the end of the cylindrical single battery 11 is provided with internal threads, and the internal and external threads are screwed to realize quick and convenient installation. In addition, the insertion protrusion 41 is provided with a threaded hole, and when the external line is connected to the cylindrical single battery 11 through the insertion protrusion 41, the external line can be screwed to the insertion protrusion 41 through a bolt. Similarly, the negative end of the cylindrical single battery 11 at the negative end of one battery pack 10 can also be provided with an end fixing member 40, which is also used for the connection of the external line.

[0058] Referring to Figure 9Preferably, the cylindrical single battery 11 is provided with a series connecting piece 70, and as mentioned above, the end of the cylindrical single battery 11 is provided with an internal thread, and the two ends of the cylindrical single battery 11 can be provided with the same size internal thread, and the series connecting piece 70 is introduced, and the two ends of the series connecting piece 70 are also provided with external threads, and the two adjacent cylindrical single batteries 11 are screwed to one end of the series connecting piece 70 to achieve electrical connection. In the above, the two ends of the cylindrical single battery 11 are provided with uniform internal threads, so that the uniform connection structure between the plurality of cylindrical single batteries 11 can be achieved, and the convenience of connecting and installing the battery pack 10 is improved. In addition, the series connecting piece 70 is designed as a hollow structure, so as to reduce its own weight.

[0059] In other embodiments, the number of battery packs 10 of one battery module can be four (the four battery packs 10 are connected according to the prior art, which will not be repeated here), and correspondingly, the number of polygonal mounting holes 21 on the positive electrode fixed support 20 is four, and the number of support mounting holes 31 on the negative electrode fixed support 30 is also four. Preferably, the four polygonal mounting holes 21 of the positive electrode fixed support 20 are arranged in pairs, and the line connecting the centers of the two polygonal mounting holes 21 arranged in pairs is parallel to the same side line of the positive electrode fixed support 20. The four support mounting holes 31 of the negative electrode fixed support 30 are arranged with reference to the four polygonal mounting holes 21.

[0060] Referring to Figure 3 Optionally, the two opposite outer side walls of the positive electrode fixed support 20 define the positive electrode fixed side surface, and at least one positive electrode fixed block 22 is arranged on the positive electrode fixed side surface.

[0061] In the height direction of the positive electrode fixed support 20, the top surface and the bottom surface of the positive electrode fixed support 20 are each provided with a strip-shaped positive electrode fixed block 22. Specifically, the positive electrode fixed block 22 extends along the long side of the surface where it is arranged, and the positive electrode fixed block 22 is used for clamping and fixing with a specific slot during installation of the positive electrode fixed support 20.

[0062] More preferably, the number of positive electrode fixed blocks 22 on the same surface of the positive electrode fixed support 20 is two, and the two positive electrode fixed blocks 22 are arranged in sequence along the long side of the positive electrode fixed support 20.

[0063] Optionally, the positive electrode fixed support 20 is provided with at least one positive electrode heat dissipation channel 23.

[0064] In this embodiment, the positive electrode heat dissipation channel 23 is preferably a heat dissipation hole, and the axial direction of the positive electrode heat dissipation channel 23 is parallel to the axial direction of the polygonal mounting hole 21. The heat dissipation hole is an open hole, and each of the two opposite side surfaces is provided with one positive electrode heat dissipation channel 23.

[0065] Referring to Figure 4Optionally, the two opposite outer side walls of the negative electrode fixing support 30 are defined as negative electrode fixing side surfaces, and at least one negative electrode fixing block 32 is arranged on the negative electrode fixing side surfaces.

[0066] In the height direction of the negative electrode fixing support 30, one strip-shaped negative electrode fixing block 32 is arranged on the top surface and the bottom surface of the negative electrode fixing support 30 respectively, and specifically, the negative electrode fixing block 32 is arranged along the long side of the surface, and the negative electrode fixing block 32 is used for clamping and fixing with a specific groove during installation of the negative electrode fixing support 30.

[0067] Preferably, the number of negative electrode fixing blocks 32 on the same surface of the negative electrode fixing support 30 is two, and the two negative electrode fixing blocks 32 are arranged along the long side of the negative electrode fixing support 30 in sequence.

[0068] Optionally, the negative electrode fixing support 30 is provided with at least one negative electrode heat dissipation channel 33.

[0069] Along the axial direction of the group of battery packs 10, the positive electrode heat dissipation channel 23 and the negative electrode heat dissipation channel 33 are arranged in alignment.

[0070] Preferably, the negative electrode heat dissipation channel 33 is a heat dissipation hole, and the axial direction of the negative electrode heat dissipation channel 33 is parallel to the axial direction of the supporting and mounting hole 31. In this embodiment, the heat dissipation hole is an open hole, and one negative electrode heat dissipation channel 33 is arranged on each of the two side surfaces.

[0071] Optionally, the two opposite outer side walls of the negative electrode fixing support 30 are defined as negative electrode fixing side surfaces, and at least one negative electrode fixing block 32 is arranged on the negative electrode fixing side surfaces. Figure 5 Optionally, the two opposite outer side walls of the negative electrode fixing support 30 are defined as negative electrode fixing side surfaces, and at least one negative electrode fixing block 32 is arranged on the negative electrode fixing side surfaces.

[0072] Preferably, the number of negative electrode fixing blocks 32 on the same surface of the negative electrode fixing support 30 is two, and the two negative electrode fixing blocks 32 are arranged along the long side of the negative electrode fixing support 30 in sequence.

[0073] Optionally, the two opposite outer side walls of the negative electrode fixing support 30 are defined as negative electrode fixing side surfaces, and at least one negative electrode fixing block 32 is arranged on the negative electrode fixing side surfaces.

[0074] In the height direction of the negative electrode fixing support 30, one strip-shaped negative electrode fixing block 32 is arranged on the top surface and the bottom surface of the negative electrode fixing support 30 respectively, and specifically, the negative electrode fixing block 32 is arranged along the long side of the surface, and the negative electrode fixing block 32 is used for clamping and fixing with a specific groove during installation of the negative electrode fixing support 30.

[0075] Preferably, the number of negative electrode fixing blocks 32 on the same surface of the negative electrode fixing support 30 is two, and the two negative electrode fixing blocks 32 are arranged along the long side of the negative electrode fixing support 30 in sequence.

[0076] Optionally, the intermediate fixed support 50 is provided with at least one intermediate heat dissipation channel 53. Along the axial direction of the battery pack 10, the positive heat dissipation channel 23, the negative heat dissipation channel 33 and the intermediate heat dissipation channel 53 are arranged in alignment.

[0077] Among them, the intermediate heat dissipation channel 53 is preferably a heat dissipation hole, and its axial direction is parallel to the axial direction of the supporting mounting hole 31. The heat dissipation hole of the embodiment is an open hole, and each of the two side surfaces is provided with one intermediate heat dissipation channel 53.

[0078] Importantly, in the embodiment, along the axial direction of the battery pack 10, one positive heat dissipation channel 23, one negative heat dissipation channel 33 and one intermediate heat dissipation channel 53 are aligned to form a wind passage.

[0079] In addition, the aforementioned positive heat dissipation channel 23, negative heat dissipation channel 33 and intermediate heat dissipation channel 53 can be correspondingly arranged at the center or other positions of the positive fixed support 20, negative fixed support 30 and intermediate fixed support 50.

[0080] Referring to Figure 13 and Figure 14 The utility model also relates to a battery pack, including casing 60 and above-mentioned battery module, casing 60 includes top cover 61 and body 62, and battery module is placed in body 62, and top cover 61 is covered in body 62, to encapsulate battery module in body 62.

[0081] Among them, the casing 60 is a cuboid structure, and the top cover 61 is covered on the opening of the casing 60 to complete the covering.

[0082] Referring to Figure 12 Optionally, the battery pack further comprises a heat dissipation fan 80, which is arranged at the end of the battery module along the axial direction of the battery pack 10 and conducts heat dissipation in the axial direction of the battery pack 10. Along the axial direction of the battery module, the side plate of at least one end of the body 62 is provided with an air outlet 621.

[0083] Among them, the battery module is provided with at least one heat dissipation fan 80. In the embodiment with and only one heat dissipation fan 80, the air outlet 621 is arranged on the side plate of the body 62 close to the heat dissipation fan 80, and the heat dissipation fan 80 blows air away from the battery module to conduct heat dissipation. Of course, when the number of heat dissipation fans 80 is two, the two heat dissipation fans 80 can blow air in the same direction at the same time. In addition, the aforementioned wind passage can provide a passage for the airflow flow of the embodiment to accelerate the flow speed of the gas.

[0084] Optionally, the inner bottom of the shell 60 is provided with a first positioning part, and the bottom of the battery module is positioned and installed on the first positioning part. And / or, the side surface of the top cover 61 is provided with a second positioning part, and the second positioning part is clamped and positioned on the top of the battery module when the top cover 61 covers the body 62.

[0085] Among them, the inner bottom of the shell 60 is provided with a first positioning part, specifically, the first positioning part is a first positioning groove, and the aforementioned can limit the consistency of the length, width and height of the positive fixed support 20, the negative fixed support 30 and the intermediate fixed support 50, so that one battery module corresponds to three parallelly arranged first positioning grooves, and the positive fixed support 20, the negative fixed support 30 and the intermediate fixed support 50 can be installed one by one in one first positioning groove when the battery module is installed on the body 62. In addition, the second positioning part of the top cover 61 is a second positioning groove, of course, the second positioning groove can also be arranged by referring to the first positioning groove, the difference is that one is at the top and one is at the bottom.

[0086] Further, the aforementioned also mentioned that the top and bottom of the three of the positive fixed support 20, the negative fixed support 30 and the intermediate fixed support 50 are respectively provided with the positive fixed block 22, the negative fixed block 32 and the intermediate fixed block 52, and the positive fixed block 22, the negative fixed block 32 and the intermediate fixed block 52 are used for inserting and fixing with the first positioning groove and the second positioning groove mentioned above, so that the first positioning groove and the second positioning groove correspond to the three one by one at this time.

[0087] Referring to Figure 10 And Figure 11 Optionally, the battery pack further comprises a conductive connecting piece 13; the number of the battery modules is multiple, and the conductive connecting piece 13 is used for connecting the multiple battery modules.

[0088] Among them, taking two battery modules as an example, one battery module comprises four battery groups 10. The four battery groups 10 of the same battery module are two by two as a group, two battery groups 10 arranged up and down in the height direction of the battery module are as a group, and the negative terminals of the battery groups 10 of the same group are connected through one conductive connecting piece 13; in the width direction of the battery module, two battery groups 10 arranged left and right are as a group, and the positive terminals of the two battery groups 10 of a selected group are connected through one conductive connecting piece 13, and the other two groups of battery groups 10 of the two battery modules, the two positive terminals of the two groups of battery groups 10 close to each other are connected through one conductive connecting piece 13, so that the multiple battery modules are connected to form a multi-module battery pack. It can be realized that the conductive connecting piece 13 is a rectangular plate, and the aforementioned positive terminal and negative terminal of each battery group 10 are provided with an end fixing piece 40, and a through hole is arranged on the conductive connecting piece 13, and a screw or the like is screwed in the threaded hole of the inserting protrusion 41 through the through hole.

[0089] In particular, in addition to being connected by the conductive connecting piece 13, the two battery modules are connected between the two intermediate fixed supports 50 of the adjacent two battery modules.

[0090] Referring to Figure 6 and Figure 7 Optionally, the two opposite outer side walls of one intermediate fixed support 50 define intermediate fixed side surfaces, and the intermediate fixed support 50 is provided with at least one first connecting part 54 and a second connecting part 55 matched with the first connecting part 54; the second connecting part 55 and the first connecting part 54 are respectively arranged on the two intermediate fixed side surfaces.

[0091] Among them, as mentioned above, one of the left and right sides of the intermediate fixed support 50 is provided with the first connecting part 54, and the other is provided with the second connecting part 55, and the first connecting part 54 of one of the two adjacent intermediate fixed supports 50 and the second connecting part 55 of the other intermediate fixed support 50 are detachably connected, thereby improving the connection tightness of the middle part of the two adjacent battery modules.

[0092] Preferably, the first connecting part 54 includes an L-shaped claw hook, and the two opposite side walls of the intermediate fixed support 50 are respectively provided with a claw hook at a position with a consistent height, so as to form a clamping position therebetween. Similarly, the two opposite side walls provided with the claw hook are respectively provided with a clamping groove, and one claw hook is clamped in one clamping groove, thereby completing the connection of the two adjacent intermediate fixed supports 5. One first connecting part 54 can be arranged at the middle position of the side wall. In the embodiment, the two first connecting parts 54 are respectively arranged at the two ends of the side wall (the upper end and the lower end of the side wall). Figure 5

[0093] Alternatively, one of the two opposite side walls is provided with a T-shaped block, and the other is provided with a T-shaped groove, and the connection between the two intermediate fixed supports 50 can also be achieved by the clamping of the T-shaped block and the T-shaped groove.

[0094] In addition, it can be known that the battery pack usually also includes a battery management system (BMS), a positive terminal 90 and a negative terminal 12, the battery management system (BMS) is arranged in the shell 60 and electrically connected with the battery module, one end of the positive terminal 90 and the negative terminal 12 is respectively electrically connected with the battery module, and the other end extends out of the body 62 through the side plate of one end of the body 62. Otherwise, the side plate of the same end of the body 62 can also be provided with a power port 14 electrically connected with the cooling fan 80, and the power port 14 is used as an input port of an external power supply to provide power for the normal operation of the cooling fan 80. Of course, the side plate can also be provided with various signal detection wire holes, and various wire holes are connected to the battery management system (BMS) through corresponding lines.

[0095] ​The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A battery module, characterized by, The battery pack (10) comprises a plurality of cylindrical single batteries (11) connected in series, at least one of the positive electrode fixing support (20) and the negative electrode fixing support (30) is provided with a polygonal mounting hole (21), the positive electrode end of the battery pack (10) is arranged on the positive electrode fixing support (20), and the negative electrode end of the battery pack (10) is arranged on the negative electrode fixing support (30). The end fixing part (40) is arranged at the positive electrode end of the battery pack (10), the positive electrode fixing support (20) is provided with at least one polygonal mounting hole (21), and the negative electrode fixing support (30) is provided with at least one supporting mounting hole (31). The end fixing part (40) of the positive electrode end is inserted into the polygonal mounting hole (21) of the positive electrode fixing support (20), and the negative electrode end of the battery pack (10) is inserted into the supporting mounting hole (31) of the negative electrode fixing support (30).

2. The battery module of claim 1, wherein, The two opposite outer side walls of the positive electrode fixing support (20) are defined as positive electrode fixing sides, and at least one positive electrode fixing block (22) is arranged on the positive electrode fixing sides. Or, the two opposite outer side walls of the positive electrode fixing support (20) are defined as positive electrode fixing sides, at least one positive electrode fixing block (22) is arranged on the positive electrode fixing sides, the two opposite outer side walls of one of the negative electrode fixing supports (30) are defined as negative electrode fixing sides, and at least one negative electrode fixing block (32) is arranged on one of the negative electrode fixing sides.

3. The battery module according to claim 1 or 2, characterized in that, Or, the positive electrode fixing support (20) is provided with at least one positive electrode heat dissipation channel (23). Or, the positive electrode fixing support (20) is provided with at least one positive electrode heat dissipation channel (23), and the negative electrode fixing support (30) is provided with at least one negative electrode heat dissipation channel (33). Along the axial direction of a group of the battery pack (10), one of the positive electrode heat dissipation channel (23) and the negative electrode heat dissipation channel (33) is arranged in alignment. ​ 4. The battery module of claim 3, wherein, ​ ​ ​ Or, one of the positive fixed support (20) is provided with at least one positive heat dissipation channel (23), one of the negative fixed support (30) is provided with at least one negative heat dissipation channel (33), one of the intermediate fixed support (50) is provided with at least one intermediate heat dissipation channel (53), along the axial direction of the battery pack (10), the positive heat dissipation channel (23), the negative heat dissipation channel (33) and the intermediate heat dissipation channel (53) are arranged in alignment.

5. The battery module of claim 3, wherein, Two opposite outer side walls of one of the intermediate fixed support (50) are defined as intermediate fixed side, at least one first connecting part (54) is arranged on the intermediate fixed support (50), and a second connecting part (55) is matched with the first connecting part (54); The second connecting part (55) and at least one first connecting part (54) are arranged at one end of the intermediate fixed side respectively.

6. The battery module of claim 3, wherein, The end fixed part (40) is screwed to the positive end and / or negative end of the battery pack (10).

7. A battery pack, characterized by, The battery module comprises a shell (60) and the battery module as claimed in any one of claims 1-6; The shell (60) comprises a top cover (61) and a body (62), the battery module is placed in the body (62), and the top cover (61) covers the body (62).

8. The battery pack of claim 7, wherein, Further comprising a heat dissipation fan (80), along the axial direction of the battery pack (10), the heat dissipation fan is arranged at the end of the battery module, and conducts flow and dissipates heat in the axial direction of the battery pack (10); Along the axial direction of the battery module, the side plate of at least one end of the body (62) is provided with an air outlet (621).

9. The battery pack of claim 7, wherein, The inner bottom of the shell (60) is provided with a first positioning part, and the bottom of the battery module is positioned and installed on the first positioning part; And / or, one side of the top cover (61) is provided with a second positioning part, when the top cover (61) covers the body (62), the second positioning part is clamped and positioned on the top of the battery module.

10. The battery pack of claim 7, wherein, Further comprising a conductive connecting sheet (13); The number of the battery module is multiple, and the conductive connecting sheet (13) is used for interconnecting the positive electrodes of the multiple battery modules and interconnecting the negative electrodes of the multiple battery modules.

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