Battery module and energy storage device

Abstract

The embodiment of the utility model relates to a battery module and an energy storage device, the battery module comprises a battery pack, two oppositely arranged fixing blocks and two oppositely arranged cover plates, and the battery pack comprises a plurality of battery cells stacked side by side; the two oppositely arranged fixing blocks are pressed on the two oppositely arranged sides of the battery pack; the two fixing blocks are arranged between the two cover plates, and each cover plate comprises a main body part and two folded edges formed by bending two opposite edges of the main body part; the two fixed edges are formed by bending the other two opposite edges of the main body part; the two fixed edges of each cover plate are respectively fixed on the two fixed blocks, and the two folded edges of each cover plate are respectively folded and buckled at the top and the bottom of the battery pack, so that the folded edges limit the top and the bottom of the battery pack along the length direction of the battery cell; the risk that the battery cells are easy to displace and even fall in the length direction of the battery cells in the prior art is overcome, and the structural stability of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to energy storage technical field, especially, relate to a battery module and energy storage device. BACKGROUND

[0002] With the popularity of electronic equipment and the rapid development of electric vehicle industry, the demand for high-performance battery module is increasing. As the core component of energy storage and power supply, the performance of the battery module directly affects the use efficiency and safety performance of the equipment. The battery module includes a plurality of battery cells. Along the thickness direction of the battery cells, the plurality of battery cells are stacked, and the steel belt is wound around the side of the whole formed by the stacked plurality of battery cells, so that the plurality of battery cells can be bundled.

[0003] The applicant of the utility model found that the existing technology has the problem of insufficient structural strength by winding the side of the battery pack with the steel belt. When the thickness of the battery cells in the battery pack is thin or when the battery module is vibrated, the battery cells are easy to displace or even fall off, affecting the structural stability of the battery module. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model embodiment provides a battery module and an energy storage device, which overcomes the above problems or at least partially solves the above problems.

[0005] According to an aspect of the utility model embodiment, a battery module is provided, which includes a battery pack, a plurality of battery cells arranged side by side and stacked, two fixed blocks pressed on the two sides of the battery pack, and two cover plates arranged oppositely, the two fixed blocks are arranged between the two cover plates, each cover plate includes a main body, two folded edges formed by bending two opposite edges of the main body, and two fixed edges formed by bending the other two opposite edges of the main body, the two fixed edges of each cover plate are fixed on the two fixed blocks respectively, and the two folded edges of each cover plate are folded on the top of the battery pack and the bottom of the battery pack respectively.

[0006] In an optional manner, the battery module further includes two first insulating sheets, each first insulating sheet is arranged between the main body of one cover plate and the battery pack, the two folded edges of one cover plate are respectively folded on the two folds of one first insulating sheet, and the two folded edges of the other cover plate are respectively folded on the two folds of the other first insulating sheet.

[0007] In an alternative mode, the battery module further comprises two second insulating sheets and a plurality of heat insulation cottons, each of the second insulating sheets is arranged between one of the fixing blocks and the battery pack, and the heat insulation cottons are arranged between two adjacent battery cells.

[0008] In an alternative mode, the battery module further comprises an insulating column arranged corresponding to each of the fixing blocks and a conductive connection assembly arranged on one side of the battery cells and the fixing blocks; each of the fixing blocks is provided with a limiting slot, each of the insulating columns comprises a limiting portion arranged in the limiting slot and a supporting portion arranged above and below the limiting portion and connected to the fixing block, and the supporting portion is used for supporting the conductive connection assembly.

[0009] In an alternative mode, the supporting portion comprises a supporting bottom plate arranged above and below the limiting portion and two supporting side plates arranged on both sides of the supporting bottom plate, and the two supporting side plates are oppositely arranged to form a groove; the conductive connection assembly comprises an insulating plate arranged corresponding to the battery pack and a total positive conductive member and a total negative conductive member respectively connected to both ends of the insulating plate; one end of the total positive conductive member and one end of the total negative conductive member are electrically connected to the battery cells, and the other end of the total positive conductive member and the other end of the total negative conductive member are respectively arranged in one of the grooves and supported by the supporting bottom plate.

[0010] In an alternative mode, the conductive connection assembly further comprises a plurality of connection conductive members and a plurality of signal sampling members arranged on the insulating plate, and the plurality of connection conductive members and the plurality of signal sampling members are electrically connected one by one; the total positive conductive member, the total negative conductive member, each of the connection conductive members, and each of the signal sampling members are all in an arc structure for bearing deformation force.

[0011] In an alternative mode, the total positive conductive member and the total negative conductive member each comprise a first conductive connection end, a second conductive connection end, and a first conductive arc-shaped portion, the first conductive connection end and the second conductive connection end are respectively connected to one of the supporting bottom plates and one of the connection conductive members, the two ends of the first conductive arc-shaped portion are respectively connected to the first conductive connection end and the second conductive connection end, and the middle part of the first conductive arc-shaped portion is away from the first conductive connection end and the second conductive connection end to form an arch bridge for wrapping the insulating plate; the connection conductive member comprises a third conductive connection end, a fourth conductive connection end, and a second conductive arc-shaped portion; the third conductive connection end and the fourth conductive connection end are respectively connected to the pole columns of two adjacent battery cells; the two ends of the second conductive arc-shaped portion are respectively connected to the third conductive connection end and the fourth conductive connection end, and the middle part of the second conductive arc-shaped portion is away from the third conductive connection end and the fourth conductive connection end to form an arch bridge.

[0012] In an alternative mode, the signal sampling member comprises a first sampling end, a second sampling end and a sampling arc-shaped portion; the first sampling end and the second sampling end are respectively connected to a circuit board on the connecting conductive member and the insulating plate; two ends of the sampling arc-shaped portion are respectively connected to the first sampling end and the second sampling end, and a middle portion of the sampling arc-shaped portion is formed as an arch bridge away from the first sampling end and the second sampling end.

[0013] In an alternative mode, at least one through hole is formed in the sampling arc-shaped portion, and an assembly groove for accommodating a temperature sampler is formed in the second sampling end.

[0014] According to an aspect of an embodiment of the present application, a battery module is provided.

[0015] The battery module provided by the embodiment of the present application has the following beneficial effects: the battery module comprises a battery pack, a plurality of battery cells arranged side by side and stacked, two fixing blocks arranged on opposite sides of the battery pack, and two cover plates arranged oppositely, the two fixing blocks are arranged between the two cover plates, each cover plate comprises a main body portion, two folded edges formed by bending two opposite edges of the main body portion, and two fixing edges formed by bending two other opposite edges of the main body portion, the two fixing edges of each cover plate are fixed on the two fixing blocks respectively, and the two folded edges of each cover plate are folded on the top of the battery pack and the bottom of the battery pack respectively. When the plurality of battery cells are fixed, even if the thickness of the battery cells is thin or the battery module is vibrated, the folded edges of the cover plate are fixed on the top and the bottom of the battery pack respectively, the folded edges limit the top and the bottom of the battery pack along the length direction of the battery cells, the risk of displacement or falling of the battery cells along the length direction of the battery cells in the prior art is reduced, and the structural stability of the battery module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the drawings that are for illustrative purposes only, and not for the purposes of limiting the embodiments, elements having the same reference numerals in the drawings represent similar elements, unless otherwise specified, the drawings do not constitute a proportional limitation.

[0017] Figure 1 is a schematic view of the battery module provided by the embodiment of the present application;

[0018] Figure 2 is an exploded schematic view of the battery module provided by the embodiment of the present application;

[0019] Figure 3 is a schematic view of the battery cell combination provided by the embodiment of the present application;

[0020] Figure 4 is a schematic view of the insulating column and the fixing block provided by the embodiment of the present application;

[0021] Figure 5 is a schematic view of the cover plate and the first insulating piece provided by the embodiment of the present application;

[0022] Figure 6 is a partial schematic view of the battery module provided by the embodiment of the present application;

[0023] Figure 7 is a schematic view of the battery module provided by the embodiment of the present application along Figure 6 the section view of P;

[0024] Figure 8 is a schematic view of the connecting assembly provided by the embodiment of the present application;

[0025] Figure 9 is a partial exploded view of the battery module provided by the embodiment of the application;

[0026] Figure 10 is another partial exploded view of the battery module provided by the embodiment of the present application;

[0027] Figure 11 is a schematic view of the battery module provided by the embodiment of the present application along Figure 10 the enlarged schematic view of A part;

[0028] Figure 12 is a schematic view of the signal sampling piece provided by the embodiment of the present application;

[0029] Figure 13 is a side schematic view of the signal sampling piece provided by the embodiment of the present application;

[0030] Figure 14 is a schematic view of the signal sampling piece provided by the embodiment of the present application along Figure 10 the enlarged schematic view of B part.

[0031] The reference signs are as follows:

[0032] The battery module 100;

[0033] The battery pack 10, the cover plate 20, the fixing block 30, the first insulating piece 40, the conductive connecting assembly 50, the insulating column 60, the top cover 70, the second insulating piece 80, the heat insulation cotton 90;

[0034] The battery cell 1, the battery cell combination 10a;

[0035] The head part 11, the tail part 12, the pole 13, the explosion-proof valve 14;

[0036] The electrode mark 131;

[0037] Body part 21, folded edge 22, fixed edge 23;

[0038] Limiting groove 31, first mounting hole 32, limiting piece 33, second mounting hole 34, second positioning hole 35, threaded hole 36;

[0039] Screw 30a;

[0040] Bend 40a;

[0041] Insulating plate 51, connecting conductive piece 52, total positive conductive piece 53, total negative conductive piece 54, circuit board 55, signal sampling piece 56, temperature sampler 57, connector 58;

[0042] First avoiding hole 511, second avoiding hole 512, positioning column 513;

[0043] First conductive connecting end 501, second conductive connecting end 502, first conductive arc-shaped part 503;First connecting hole 5011;

[0044] Third conductive connecting end 5201, fourth conductive connecting end 5202, second conductive arc-shaped part 5203;

[0045] Third avoiding hole 551;

[0046] First positioning hole 520;Observation hole 521;

[0047] First sampling end 561, second sampling end 562, sampling arc-shaped part 563;Through hole 5631;Assembly groove 5621;Nickel layer 5601, copper layer 5602;

[0048] Limiting part 61, supporting part 62;Supporting bottom plate 621, supporting side plate 622;Groove 622a;Second connecting hole 6211;

[0049] Thickness direction D1, length direction D2, width direction D3. DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or one or more intervening elements can be present therebetween. When an element is described as "connected" to another element, it can be directly connected to another element, or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the specification are only for the purpose of illustration.

[0051] Unless otherwise defined, all technical and scientific terms used in the present disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application solely for the purpose of describing a specific embodiment of the present application, and is not intended to limit the present application. The term "and / or" used in the present application includes any and all combinations of one or more of the associated listed items.

[0052] Referring to Figure 1 and Figure 2 The embodiment of the present application provides a battery module 100, the battery module 100 includes a battery pack 10, two cover plates 20, two fixing blocks 30, two first insulating sheets 40, a conductive connection assembly 50, two insulating columns 60, a top cover 70, two second insulating sheets 80 and a plurality of heat insulation cottons 90.

[0053] The battery pack 10 includes a plurality of battery cells 1 arranged side by side and stacked.

[0054] Referring to Figure 3 The battery cell 1 has six surfaces, the surface where the pole 13 of the battery cell 1 is located is the top 11 of the battery cell 1, the bottom 12 of the battery cell 1 corresponds to the top 11 of the battery cell 1, and the direction from the top 11 to the bottom 12 of the battery cell 1 is the length direction D2 of the battery cell 1; the six surfaces of the battery cell 1 are the surface where the top 11 of the battery cell 1 is located, the surface where the bottom 12 of the battery cell 1 is located, and four side surfaces, two of the four side surfaces are arranged opposite to each other, and the other two are arranged opposite to each other, the distance between the two side surfaces arranged opposite to each other is smaller than the distance between the other two side surfaces arranged opposite to each other, and the direction in which the two side surfaces arranged opposite to each other are arranged opposite to each other is the thickness direction D1 of the battery cell 1, that is, the direction in which the plurality of battery cells 1 are stacked, and the direction in which the other two side surfaces arranged opposite to each other are arranged opposite to each other is the width direction D3 of the battery cell 1. The thickness direction D1, the length direction D2 and the width direction D3 of the battery cell 1 are perpendicular to each other.

[0055] It is worth noting that the top 11 of the plurality of stacked battery cells 1 forms the top of the battery pack 10, and the bottom 12 of the plurality of stacked battery cells 1 forms the bottom of the battery pack 10.

[0056] In the battery module 100 provided in the embodiment of the utility model, two first insulating sheets 40 are arranged on both sides of the plurality of battery cells 1 along the width direction D3 of the battery cell 1, two cover plates 20 are arranged on both sides of the plurality of battery cells 1 along the width direction D3 of the battery cell 1, one of the first insulating sheets 40 is arranged between one of the cover plates 20 and the plurality of battery cells 1, and the other first insulating sheet 40 is arranged between the other cover plate 20 and the plurality of battery cells 1. Two fixing blocks 30 are arranged on the other two sides of the plurality of battery cells 1 along the thickness direction D1 of the battery cell 1, so that the plurality of battery cells 1 are limited along the thickness direction D1 of the battery cell 1. The conductive connection assembly 50 is electrically connected with the battery cell 1 and is used for input or output of the circuit in the battery cell 1. The insulating column 60 is arranged on the fixing block 30, and the insulating column 60 is used for bearing part of the conductive connection assembly 50. The top cover 70 is arranged on the conductive connection assembly 50. The second insulating sheet 80 is arranged between the end of the plurality of stacked battery cells 1 and the fixing block 30. The heat insulation cotton 90 is used for heat insulation between the plurality of battery cells 1. Through the battery module 100, the battery module 100 can be externally supplied with power or charged as a whole.

[0057] It is worth noting that in the embodiment of the utility model, the battery module 100 can also not be provided with the first insulating sheet 40, the conductive connection assembly 50, the insulating column 60, the top cover 70, the second insulating sheet 80 and the heat insulation cotton 90, and the application target of reducing the risk of displacement or even falling of the battery cell 1 along the length direction D2 of the battery cell 1 in the prior art and the application target of improving the structural stability of the battery module 100 can also be achieved.

[0058] For the battery pack 10 and the heat insulation cotton 90, the top 11 of the battery cell 1 in the battery pack 10 is provided with a pole 13 and an explosion-proof valve 14, the pole 13 can be used to supply power to the outside or charge the battery cell 1. Through the arrangement of the explosion-proof valve 14, when the battery cell 1 is in thermal runaway, the explosion-proof valve 14 has a space to pop open, so that the battery cell 1 releases pressure and reduces the risk of fire and explosion of the battery cell 1.

[0059] It is worth noting that in some embodiments, an electrode mark 131 is arranged on the pole 13, the electrode mark 131 indicates the polarity of the pole 13, and the arrangement of the electrode mark 131 facilitates the series and parallel connection between the battery cells 1.

[0060] It is worth mentioning that in some embodiments, the positive pole 13 of the two battery cells 1 is matched with the positive pole 13, the negative pole 13 is matched with the negative pole 13, and the middle of the two battery cells 1 is matched with the high-temperature double-sided adhesive, so as to facilitate the subsequent parallel connection of the two battery cells 1. The two battery cells 1 form a battery cell combination 10a, and a plurality of battery cell combinations 10a are stacked along the thickness direction D1 of the battery cell 1. The heat insulation cotton 90 is arranged between any two battery cells 1. The heat insulation cotton 90 has high temperature resistance and low thermal conductivity, and the thermal conductivity is usually between 0.02-0.04 W / m.k, which is an excellent material for heat insulation of the battery module 100, and the heat insulation cotton 90 also has elasticity. Through the arrangement of the heat insulation cotton 90, on the one hand, the battery module 100 will generate a certain amount of heat during charging and discharging, and if the temperature is too high, it may cause the battery cell 1 to swell, and even cause a safety accident; the heat insulation cotton 90 has good heat insulation performance, can effectively isolate the heat conduction between the battery cells 1, avoid heat accumulation and cause the battery cell 1 to lose control, so as to achieve temperature balance of each string of battery cell combinations 10a; on the other hand, the elastic heat insulation cotton 90 can also play a role in buffering and fixing the battery module 100. In the process of assembling the battery module 100, if the size of the battery cell 1 along the thickness direction D1 is thin or thick, the elasticity of the heat insulation cotton 90 can be used to compensate for the size. Specifically, through the arrangement of the heat insulation cotton 90, if the size of the battery cell 1 along the thickness direction D1 is thin, the elasticity of the heat insulation cotton 90 can compensate for the size of the battery cell 1, so as to meet the size design requirements of the assembled structure; in addition, if the size of the battery cell 1 along the thickness direction D1 is thick, the elasticity of the heat insulation cotton 90 can be used to absorb the excess size of the battery cell 1, thereby reducing the size requirements of the battery cell 1; in addition, since the battery module 100 may encounter vibration, impact and other situations during use, the heat insulation cotton 90 can absorb and disperse these stresses, reduce the shaking and collision of the battery module 100, and thus improve the stability and reliability of the battery module 100.

[0061] For the above two fixing blocks 30 and two second insulating sheets 80, the two fixing blocks 30 are arranged on the other two sides of the plurality of battery cells 1 along the thickness direction D1 of the battery cell 1, and the fixing block 30 is used to limit the plurality of battery cells 1 along the thickness direction D1 of the battery cell 1. A second insulating sheet 80 is arranged between the fixing block 30 and the end of the stacked plurality of battery cells 1. Through the arrangement of the second insulating sheet 80, the second insulating sheet 80 isolates the battery cell 1 from the fixing block 30, preventing contact short circuit between the battery cell 1 and the fixing block 30.

[0062] It is worth mentioning that in some embodiments, please refer to Figure 4The fixing block 30 is provided with a limiting groove 31 and a first mounting hole 32 communicating with the groove wall of the limiting groove 31, the limiting groove 31 is used for mounting the insulating column 60, and the first mounting hole 32 is used for fixing the insulating column 60 to the fixing block 30.

[0063] It is worth noting that in some embodiments, a plurality of limiting members 33 are further arranged in the limiting groove 31, the plurality of limiting members 33 are distributed, and when the insulating column 60 is mounted in the limiting groove 31, the plurality of limiting members 33 are used for limiting the insulating column 60, which not only can improve the standardization of the installation of the limiting column, but also can improve the convenience of the installation of the insulating column 60 and provide production efficiency.

[0064] It is worth noting that in some embodiments, the fixing block 30 is further provided with a second mounting hole 34, and the second mounting hole 34 is used for connecting the battery module 100 and external equipment.

[0065] It is worth noting that in some embodiments, the fixing block 30 is further provided with a second positioning hole 35, and the second positioning hole 35 is used for jig positioning when the battery module 100 is assembled in groups, so as to prevent the fixing block 30 from being skewed and left / right / up / down displaced, and at the same time, the second positioning hole 35 can also be used as a lifting and carrying hole and a lifting and mounting hole of the battery module 100 (since the battery module 100 is too heavy, lifting equipment is needed for auxiliary work), which ensures the rationality and safety of the work.

[0066] It is worth noting that in some embodiments, the fixing block 30 is further provided with a screw hole 36, and the screw hole 36 is used for connecting the fixing block 30 and the cover plate 20.

[0067] It is worth noting that in some embodiments, the fixing block 30 is made of aluminum alloy.

[0068] For the above two cover plates 20, please refer to Figure 2 and Figure 5The cover plate 20 comprises a main body 21, two folded edges 22 formed by bending two opposite edges of the main body 21, and two fixing edges 23 formed by bending two other opposite edges of the main body 21. The main body 21 of the two cover plates 20 is arranged on both sides of the plurality of battery cells 1 along the width direction D3 of the battery cell 1; the two folded edges 22 are arranged opposite to each other along the length direction D2 of the battery cell 1, one of the folded edges 22 is buckled on the top of the plurality of battery packs 10, and the other folded edge 22 is buckled on the bottom of the plurality of battery packs 10; and the two fixing edges 23 are arranged opposite to each other along the thickness direction D1 of the battery cell 1, and one of the fixing edges 23 is fixed to the threaded hole 36 of the fixing block 30. Specifically, the fixing edge 23 is fixed to the threaded hole 36 of the fixing block 30. By arranging the cover plate 20, when the plurality of battery cells 1 are further fixed, even if the thickness of the battery cell 1 is thin or when the battery module 100 is vibrated, since the cover plate 20 has two folded edges 22 buckled on the top of the battery pack 10 and the bottom of the battery pack 10 respectively, the folded edges 22 limit the top of the battery pack 10 and the bottom of the battery pack 10 along the length direction D2 of the battery cell 1, and the folded edges 22 limit the top 11 and the bottom 12 of the battery cell 1, thereby reducing the risk of displacement or even falling of the battery cell 1 along the length direction D2 of the battery cell 1 in the prior art, and improving the structural stability of the battery module 100. In addition, since the cover plate 20 further comprises the fixing edge 23, and the fixing edge 23 is fixed to the fixing block 30, the plurality of battery cells 1 are limited along the thickness direction D1 of the battery cell 1, thereby reducing the risk of displacement or even falling of the battery cell 1 along the thickness direction D1 of the battery cell 1.

[0069] It is worth noting that in some embodiments, the material of the cover plate 20 is aluminum alloy.

[0070] For the above two first insulating sheets 40, please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 7 The first insulating sheet 40 is arranged between the main body 21 of the cover plate 20 and the battery pack 10 along the width direction D3 of the battery cell 1. By arranging the first insulating sheet 40, the battery pack 10 and the cover plate 20 are isolated to prevent contact short circuit between the battery pack 10 and the cover plate 20.

[0071] It is worth noting that in some embodiments, the first insulating sheet 40 is bent and extended to form two bends 40a, and the two bends 40a are oppositely arranged along the length direction D2 of the battery cell 1; one of the bends 40a is buckled on the top of the battery pack 10, and the folded edge 22 of one of the cover plates 20 is buckled on the bend 40a; the other bend 40a is buckled on the bottom of the battery pack 10, and the folded edge 22 of the other cover plate 20 is buckled on the other bend 40a. Through this arrangement, when assembling the battery module 100, the extrusion equipment can be used to apply pressure to the two ends of the fixed block 30 to compress the battery cells 1 in the battery pack 10, and then the first insulating sheet 40 is added on both sides of the battery pack 10, and the two bends 40a formed by the extension of the first insulating sheet 40 are buckled on the top of the battery pack 10 and the bottom of the battery pack 10, and then the cover plate 20 is buckled on the first insulating sheet 40, and the fixed edge 23 of the cover plate 20 is fixed with the fixed block 30 through the screw 30a. Through this arrangement, the side surface of the battery cell 1 along the width direction D3 is fixed by the main body 21 of the cover plate 20, the top of the battery pack 10 and the bottom of the battery pack 10 are fixed by the bends 40a of the first insulating sheet 40 and the folded edge 22 of the cover plate 20, and the side surface of the battery pack 10 along the thickness direction D1 of the battery cell 1 is fixed by the fixed edge 23 of the cover plate 20 and the fixed block 30, realizing the fixation of the battery pack 10 in three directions and six surfaces, and improving the structural stability of the battery module 100.

[0072] For the above-mentioned conductive connection assembly 50, please refer to Figure 8 and Figure 9 , the conductive connection assembly 50 is used to electrically connect with a plurality of battery cells 1 respectively, and realizes the charging and discharging of the battery cell 1 through the conductive connection assembly 50.

[0073] It is worth noting that in some embodiments, the conductive connection assembly 50 includes an insulating plate 51 arranged above and below the battery pack 10, and a total positive conductive part 53 and a total negative conductive part 54 respectively connected to both ends of the insulating plate 51; one end of the total positive conductive part 53 and one end of the total negative conductive part 54 are electrically connected with the battery cell 1, and the other end of the total positive conductive part 53 and the other end of the total negative conductive part 54 are respectively supported on the insulating column 60.

[0074] It is worth mentioning that in some embodiments, the conductive connection assembly 50 further comprises a plurality of connection conductive pieces 52; the insulating plate 51 is provided with a first avoiding hole 511, the insulating plate 51 is arranged on the top 11 of the plurality of battery cells 1, and the pole 13 of the battery cell 1 is exposed to the first avoiding hole 511; the total positive conductive piece 53 and the total negative conductive piece 54 are oppositely arranged along the thickness direction D1 of the battery cell 1, the total positive conductive piece 53 and the total negative conductive piece 54 are respectively electrically connected with the pole 13 of the battery cell 1 located at the end, and the connection conductive piece 52 is electrically connected with the pole 13 of the battery cell 1 located in the middle, so that the plurality of battery cells 1 are connected in parallel or series. Wherein, the number of the connection conductive piece 52 can be reasonably arranged according to the actual situation, for example, one connection conductive piece 52 connects four battery cells 1.

[0075] It is worth mentioning that in some embodiments, the insulating plate 51 is further provided with a second avoiding hole 512, when the insulating plate 51 is arranged on the top 11 of the plurality of battery cells 1, the explosion-proof valve 14 of the battery cell 1 is exposed to the second avoiding hole 512, so that the battery cell 1 can be pressure released when thermal runaway occurs.

[0076] It is worth mentioning that in some embodiments, the insulating plate 51 is further provided with a plurality of positioning columns 513, the connection conductive piece 52 is provided with a plurality of first positioning holes 520, each positioning column 513 penetrates through a first positioning hole 520, so as to realize the positioning of the connection conductive piece 52 arranged on the insulating plate 51.

[0077] It is worth mentioning that in some embodiments, the connection conductive piece 52 is provided with an observation hole 521, when the connection conductive piece 52 is electrically connected with the pole 13 of the battery cell 1 located in the middle, the electrode mark 131 on the pole 13 is exposed to the observation hole 521, so as to facilitate the series and parallel connection of the battery cell 1.

[0078] It is worth mentioning that in some embodiments, the conductive connection assembly 50 further comprises a circuit board 55, the circuit board 55 is conveniently arranged on the insulating plate 51 through the positioning column 513.

[0079] In some embodiments, the circuit board 55 is provided with a third avoiding hole 551, when the circuit board 55 is arranged on the insulating plate 51, the third avoiding hole 551 corresponds to the second avoiding hole 512, so that the explosion-proof valve 14 of the battery cell 1 is exposed to the second avoiding hole 512 and the third avoiding hole 551, so that the battery cell 1 can be pressure released when thermal runaway occurs.

[0080] It is worth mentioning that in some embodiments, the conductive connection assembly 50 further comprises a plurality of signal sampling members 56, which are in one-to-one conductive connection with the connection conductive members 52. The signal sampling members 56 are also in electrical connection with the circuit board 55.

[0081] In some embodiments, the signal sampling members 56 are voltage sampling members, which are used to collect the voltage of the battery cell 1 connected with the connection conductive members 52. It can be understood that the number of the signal sampling members 56 is equal to the number of the connection conductive members 52.

[0082] It is worth mentioning that in some embodiments, the conductive connection assembly 50 further comprises a temperature sampler 57 connected with the circuit board 55, which is used to collect the temperature of the battery cell 1.

[0083] It is worth mentioning that in some embodiments, the temperature sampler 57 is arranged close to the signal sampling members 56, so that the metallic property of the signal sampling members 56 can be used to absorb the temperature of the connection conductive members 52 and transmit it to the temperature sampler 57.

[0084] It is worth mentioning that in some embodiments, the conductive connection assembly 50 further comprises a connector 58 connected with the circuit board 55, through which the signal sampling members 56 can transmit voltage data and the temperature sampler 57 can transmit temperature data, so as to realize the monitoring of the battery module 100.

[0085] It is worth mentioning that the total positive conductive member 53, the total negative conductive member 54, each of the connection conductive members 52, and each of the signal sampling members 56 are all in an arch structure for bearing deformation force.

[0086] Specifically, the total positive conductive member 53 and the total negative conductive member 54 form the same arch structure. Please refer to Figure 8 (Taking the total positive conductive member 53 as an example), the total positive conductive member 53 and the total negative conductive member 54 both comprise a first conductive connection end 501, a second conductive connection end 502, and a first conductive arc-shaped portion 503. The first conductive connection end 501 and the second conductive connection end 502 are respectively connected with one of the insulating columns 60 and one of the connection conductive members 52. The two ends of the first conductive arc-shaped portion 503 are respectively connected with the first conductive connection end 501 and the second conductive connection end 502, and the middle part of the first conductive arc-shaped portion 503 is away from the first conductive connection end 501 and the second conductive connection end 502 to form an arch bridge for wrapping the insulating plate 51.

[0087] Please refer to Figure 10The connecting conductive piece 52 includes a third conductive connecting end 5201, a fourth conductive connecting end 5202, and a second conductive arc-shaped portion 5203. The third conductive connecting end 5201 and the fourth conductive connecting end 5202 are respectively connected to the pole 13 of two adjacent battery cells 1. The two ends of the second conductive arc-shaped portion 5203 are respectively connected to the third conductive connecting end 5201 and the fourth conductive connecting end 5202, and the middle part of the second conductive arc-shaped portion 5203 is away from the third conductive connecting end 5201 and the fourth conductive connecting end 5202 to form an arch bridge. After the battery cell 1 is used for a plurality of cycles, the battery cell 1 may expand to different degrees. At this time, the battery cell 1 connected to the two ends of the connecting conductive piece 52 can generate a transverse pulling force on the connecting conductive piece 52. The arch bridge structure can effectively buffer the transverse pulling force, so that the connection between the connecting conductive piece 52 and the battery cell 1 is more reliable, and the risk of welding is avoided.

[0088] Please refer to Figure 11 and Figure 12 The signal sampling piece 56 includes a first sampling end 561, a second sampling end 562, and a sampling arc-shaped portion 563. The first sampling end 561 and the second sampling end 562 are respectively connected to the circuit board 55 on the connecting conductive piece 52 and the insulating plate 51. The two ends of the sampling arc-shaped portion 563 are respectively connected to the first sampling end 561 and the second sampling end 562, and the middle part of the sampling arc-shaped portion 563 is away from the first sampling end 561 and the second sampling end 562 to form an arch bridge.

[0089] In some embodiments, at least one through hole 5631 is formed in the sampling arc-shaped portion 563 to weaken the strength of the arch bridge, so that the sampling arc-shaped portion 563 can effectively stretch and resist the impact stress under the influence of vibration or impact stress. The second sampling end 562 is provided with a mounting groove 5621 for accommodating a temperature sampler. The temperature sampler 57 is installed in the mounting groove 5621, so that the temperature sampler 57 can absorb the temperature of the battery cell 1 transmitted by the signal sampling piece 56 at a close distance, thereby ensuring the accuracy of temperature sampling of the battery module 100.

[0090] In some embodiments, please refer to Figure 11 and Figure 13The signal sampling piece 56 includes a nickel layer 5601 and a copper layer 5602 stacked in an up-down manner, and the copper layer 5602 is stacked on the connecting conductive piece 52. In order to improve the heat conduction performance and welding process of the signal sampling piece 56, the copper-nickel composite material is designed, the nickel layer 5601 is designed at the top of the signal sampling piece 56, and the copper layer 5602 is designed at the bottom of the signal sampling piece 56. The nickel layer 5601 has good laser device welding performance, and the copper layer 5602 has good heat conduction performance, which can effectively reduce the temperature difference value of the temperature sampler 57; the accuracy of the battery module 100 sampling temperature data is improved, thereby the risk of fire and explosion caused by thermal runaway of the battery module 100 in use is reduced to the greatest extent.

[0091] For the above two insulating columns 60, please refer to Figure 1 The total positive conductive piece 53 is arranged in one of the insulating columns 60, and the total negative conductive piece 54 is arranged in the other insulating column 60; one of the insulating columns 60 is fixed to one of the fixing blocks 30. The total positive conductive piece 53 and the total negative conductive piece 54 are supported by the insulating columns 60, and the connection stability of the total positive conductive piece 53 and the total negative conductive piece 54 is improved.

[0092] In some embodiments, please refer to Figure 14 Each of the insulating columns 60 includes a limiting portion 61 arranged in the limiting groove 31 of the fixing block 30 and a supporting portion 62 connected to the limiting portion 61 and arranged above and below the fixing block 30, and the supporting portion 62 is used for supporting the conductive connection assembly 50. Specifically, the supporting portion 62 is used for supporting the total positive conductive piece 53 or the total negative conductive piece 54 of the conductive connection assembly 50.

[0093] In some embodiments, the supporting portion 62 includes a supporting bottom plate 621 arranged above and below the limiting portion 61 and two supporting side plates 622 respectively arranged on both sides of the supporting bottom plate 621, the two supporting side plates 622 are arranged oppositely to form a groove 622a, the number of the insulating columns 60 is two, the number of the grooves 622a is two, and the other end of the total positive conductive piece 53 and the other end of the total negative conductive piece 54 are respectively located in one of the grooves 622a and supported by the supporting bottom plate 621. By arranging the insulating columns 60, the total positive conductive piece 53 or the total negative conductive piece 54 is supported, and the use reliability of the total positive conductive piece 53 or the total negative conductive piece 54 extending out of the insulating plate 51 is improved.

[0094] It is worth mentioning that when the total positive conductive part 53 and the total negative conductive part 54 each include the first conductive connecting end 501, the second conductive connecting end 502, and the first conductive arc-shaped part 503, the first conductive connecting end 501 is provided with a first connecting hole 5011, the support bottom plate 621 of the insulating column 60 is provided with a second connecting hole 6211, and the total positive conductive part 53 or the total negative conductive part 54 is installed on the support bottom plate 621 of the insulating column 60 through the first connecting hole 5011 and the second connecting hole 6211.

[0095] For the above-mentioned top cover 70, please refer to Figure 10 The top cover 70 is provided on the side of the conductive connecting assembly 50 away from the battery cell 1, and the top cover 70 is insulated. Through the arrangement of the top cover 70, the risk of short circuit between the battery cell 1 and external equipment is reduced.

[0096] It is worth mentioning that in the embodiment of the utility model, the plurality of battery cells 1 in the battery pack 10 in the battery module 100 are stacked, and the two fixing blocks 30 arranged on opposite sides of the battery pack 10 apply a binding force along the thickness direction D1 of the battery cell 1 to the battery pack 10; the two cover plates 20 arranged oppositely apply a binding force along the width direction D3 of the battery cell 1 to the battery pack 10, the two fixing blocks 30 are arranged between the two cover plates 20, each cover plate 20 includes a main body part 21, two folded edges 22 formed by bending two edges opposite to the main body part 21, and two fixing edges 23 formed by bending other two edges opposite to the main body part 21; the two fixing edges 23 of each cover plate 20 are fixed on the two fixing blocks 30 respectively, and the two folded edges 22 of each cover plate 20 are folded on the top of the battery pack 10 and the bottom of the battery pack 10 respectively. The conductive connecting assembly 50 is electrically connected with the battery cell 1, and is used for input or output of the circuit in the battery cell 1. The insulating column 60 is arranged on the fixing block 30, and the insulating column 60 is used for bearing the total positive conductive part 53 and the total negative conductive part 54 in the conductive connecting assembly 50. The top cover 70 is arranged on the conductive connecting assembly 50. The second insulating sheet 80 is located between the end of the plurality of stacked battery cells 1 and the fixing block 30. The heat insulation cotton 90 is used for heat insulation between the plurality of battery cells 1. Through the battery module 100, the battery module 100 can supply power or charge as a whole.

[0097] In addition, the first insulating sheet 40 of the battery module 100 is bent and extended to form two bends 40a, and the two bends 40a are oppositely arranged along the length direction D2 of the battery cell 1; one of the bends 40a is buckled on the top of the plurality of battery cells 1, and the folded edge 22 of one of the cover plates 20 is buckled on the one of the bends 40a; the other of the bends 40a is buckled on the bottom 12 of the plurality of battery cells 1, and the folded edge 22 of the other of the cover plates 20 is buckled on the other of the bends 40a; the side of the battery cell 1 along the width direction D3 is fixed by the main body 21 of the cover plate 20, the top 11 and the bottom 12 of the battery cell 1 are fixed by the bends 40a of the first insulating sheet 40 and the folded edge 22 of the cover plate 20, and the side of the battery cell 1 along the thickness direction D1 is fixed by the fixed edge 23 of the cover plate 20 and the fixed block 30, so that the battery pack 10 formed by the plurality of stacked battery cells 1 is fixed in three directions and six surfaces, and the structural stability of the battery module 100 is improved.

[0098] The utility model embodiment further provides an embodiment of an energy storage device, and the energy storage device comprises the battery module 100. For the specific structure and function of the battery module 100, refer to the above embodiment, and details will not be repeated here.

[0099] It should be noted that the specification and drawings of the utility model give the preferred embodiments of the utility model, but the utility model can be realized by many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not as additional limitation to the content of the utility model, and the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Furthermore, the above technical features continue to combine, form various embodiments not listed above, and are regarded as the range of the specification of the utility model; further, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the claims of the utility model.

Claims

1. A battery module, characterized in that, include: A battery pack, comprising multiple battery cells stacked side-by-side; Two fixing blocks are pressed together on opposite sides of the battery pack; as well as Two cover plates are arranged opposite each other, and two fixing blocks are disposed between the two cover plates. Each cover plate includes a main body and two folded edges formed by bending from two opposite edges of the main body. as well as Two fixed edges are formed by bending from the other two opposite edges of the main body; The two fixed edges of each cover plate are respectively fixed to the two fixed blocks, and the two folded edges of each cover plate are respectively folded to the top and bottom of the battery pack.

2. The battery module according to claim 1, characterized in that, The battery module further includes two first insulating sheets, each of which is disposed between the main body of one of the cover plates and the battery pack; the two folds of one of the cover plates are respectively folded over the two bends of one of the first insulating sheets; the two folds of the other cover plate are respectively folded over the two bends of the other first insulating sheet.

3. The battery module according to claim 1 or 2, characterized in that, The battery module also includes two second insulating sheets and multiple heat insulation cottons. Each second insulating sheet is disposed between a fixing block and the battery pack, and the heat insulation cottons are sandwiched between two adjacent battery cells.

4. The battery module according to claim 1, characterized in that, The battery module also includes insulating posts that correspond one-to-one with the fixing blocks and conductive connection components located on one side of the battery cells and the fixing blocks arranged side by side. Each of the fixed blocks has a limiting groove, and each of the insulating columns includes a limiting part disposed in the limiting groove and a supporting part connected to the limiting part and disposed vertically with the fixed block. The supporting part is used to support the conductive connection assembly.

5. The battery module according to claim 4, characterized in that, The support portion includes a support base plate disposed above and below the limiting portion and two support side plates disposed on both sides of the support base plate, the two support side plates being disposed opposite each other to form a groove; The conductive connection assembly includes an insulating plate disposed above and below the battery pack, and a total positive conductive component and a total negative conductive component respectively connected to both ends of the insulating plate; One end of the total positive conductive component and one end of the total negative conductive component are both electrically connected to the battery cell. The other ends of the total positive conductive component and the other ends of the total negative conductive component are respectively located in the groove and supported by the supporting base plate.

6. The battery module according to claim 5, characterized in that, The conductive connection assembly further includes multiple connecting conductive elements and multiple signal sampling elements, all disposed on the insulating plate, with each of the multiple connecting conductive elements and multiple signal sampling elements being conductively connected in a one-to-one manner; the total positive conductive element, the total negative conductive element, each of the connecting conductive elements, and each of the signal sampling elements are all arched structures for bearing deformation forces.

7. The battery module according to claim 6, characterized in that, Both the total positive conductive component and the total negative conductive component include a first conductive connection end, a second conductive connection end, and a first conductive arc portion. The first conductive connection end and the second conductive connection end are respectively in contact with and connected to a supporting base plate and a connecting conductive component. The two ends of the first conductive arc portion are respectively connected to the first conductive connection end and the second conductive connection end, and the middle part of the first conductive arc portion forms an arch bridge for wrapping the insulating plate, facing away from the first conductive connection end and the second conductive connection end. The conductive connecting component includes a third conductive connecting end, a fourth conductive connecting end, and a second conductive arc-shaped portion; the third conductive connecting end and the fourth conductive connecting end are respectively in contact with the poles of two adjacent battery cells; the two ends of the second conductive arc-shaped portion are respectively connected to the third conductive connecting end and the fourth conductive connecting end, and the middle part of the second conductive arc-shaped portion forms an arch bridge facing away from the third conductive connecting end and the fourth conductive connecting end.

8. The battery module according to claim 6, characterized in that, The signal sampling device includes a first sampling end, a second sampling end, and a sampling arc-shaped portion; the first sampling end and the second sampling end are respectively in contact with a circuit board on a connecting conductive element and an insulating plate, the two ends of the sampling arc-shaped portion are respectively connected to the first sampling end and the second sampling end, and the middle part of the sampling arc-shaped portion forms an arch bridge facing away from the first sampling end and the second sampling end.

9. The battery module according to claim 8, characterized in that, The sampling arc-shaped portion has at least one through hole, and the second sampling end has an assembly slot for accommodating the temperature sampler.

10. An energy storage device, characterized in that, Includes the battery module as described in any one of claims 1-9.

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