Battery module and battery box

Abstract

The utility model relates to a battery module and a battery box, and relates to the technical field of new energy batteries. The utility model provides a battery module. The battery module comprises at least two battery cells, the heat insulation pads are arranged between the adjacent battery cells, gaps are formed between the bottoms of the heat insulation pads and the side walls of the adjacent battery cells, and the gaps are filled with first adhesive layers. And a gap is formed between the bottom of the heat insulation pad and the side wall of the adjacent battery cell, so that the colloid coated on the lower box body fills the gap and forms a first glue layer. Through the arrangement, the bonding area between the battery cells is increased, the reliability of fixation between the battery cells is improved, the risk of battery box failure caused by cracking of the heat-conducting structural adhesive is avoided, and meanwhile, the use working condition of a mine truck can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field, specifically, relate to a battery module and battery box. BACKGROUND

[0002] The inventor found that, at present, although the ordinary steel band module scheme in the mine truck battery pack is low in cost, but cannot meet the 3 times intensity 31467.3 vibration test requirement. The bottom structure glue of the ordinary steel band module scheme has the risk of delamination cracking, because the area of the cell bottom of the ordinary steel band module scheme is certain, and the area of the cell that can be bonded is certain, so when the working condition is more severe, the structure glue has the risk of cracking. SUMMARY

[0003] The utility model discloses a battery module and battery box, which can increase the bonding area between cells and avoid the risk of battery box failure caused by cracking of the heat-conducting structure glue.

[0004] The embodiment of the utility model can be realized as follows:

[0005] In a first aspect, the utility model provides a battery module, comprising: at least two cells;

[0006] A heat insulation pad is arranged between adjacent cells, the bottom of the heat insulation pad and the side wall of the adjacent cell form a gap, and the gap is filled with a first glue layer.

[0007] Optionally, the height of the gap is 15-25mm.

[0008] Optionally, the width of the gap is 1-3mm.

[0009] Optionally, the battery module further comprises an end plate, and the at least two cells are clamped between two end plates.

[0010] The battery module further comprises at least one steel band, and the at least two cells and the two end plates are fixed in the at least one steel band.

[0011] Optionally, the battery module further comprises a pressing plate, the pressing plate is arranged on the top surface of the at least two cells, and the two ends of the pressing plate are fixed to the top of the two end plates.

[0012] In a second aspect, the utility model provides a battery box, comprising: at least one battery module as described above; and a lower box body, wherein the at least one battery module is arranged on the lower box body.

[0013] Optionally, a colloid is coated on the lower box, and the at least one battery module is pressed into the lower box so that the colloid fills the gap and forms the first glue layer.

[0014] Optionally, the colloid between the bottom of the at least two battery cells and the lower box forms a second glue layer.

[0015] Optionally, the battery module includes at least two, and the at least two battery modules are fixed and electrically connected.

[0016] The colloid between adjacent battery modules forms a third glue layer.

[0017] Optionally, the amount of the colloid is greater than a conventional usage amount.

[0018] The battery module and the battery box provided by the embodiment of the utility model have the following beneficial effects:

[0019] The colloid coated on the lower box fills the gap and forms a first glue layer by forming a gap between the bottom of the heat insulation pad and the side wall of the adjacent battery cell. By such an arrangement, the bonding area between the battery cells is increased, the reliability of the fixation between the battery cells is improved, the risk of the battery box failure caused by the cracking of the heat-conducting structural glue is avoided, and the use conditions of the mine truck are met. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0021] Figure 1 The exploded view of the battery box provided by the embodiment;

[0022] Figure 2 The structure schematic view of the battery module provided by the embodiment without forming a first glue layer;

[0023] Figure 3 The partial schematic view in the Figure 2

[0024] Figure 4 The structure schematic view of the battery module provided by the embodiment forming a first glue layer;

[0025] Figure 5 The partial sectional view of the battery module provided by the embodiment forming a first glue layer;

[0026] Figure 6 ​A first exploded view of the battery module provided for the embodiment;

[0027] Figure 7 A second exploded view of the battery module provided for the embodiment.

[0028] Icon: 010-battery box; 100-lower box body; 110-bottom plate; 120-side beam; 130-front wall; 131-mounting port; 140-rear wall; 150-front electrical mounting plate; 200-upper box body; 300-sealing ring; 400-battery module; 410-cell; 420-heat insulation pad; 430-gap; 440-first adhesive layer; 450-second adhesive layer; 460-third adhesive layer; 470-end plate; 480-steel belt; 490-pressing plate. DETAILED DESCRIPTION

[0029] The current mine truck adopts a low-side box battery pack, and the battery module is adhered to the lower box body by a bottom structure adhesive. Such a low-side box battery pack can meet the use conditions of ordinary heavy trucks or buses, but cannot meet the use requirements of mine trucks in mine operations.

[0030] The inventor found that, although the ordinary steel belt module scheme inside the mine truck battery pack is low in cost, it cannot meet the 3 times strength 31467.3 vibration test requirement. The bottom structure adhesive of the ordinary steel belt module scheme has the risk of adhesive cracking; because the area of the cell bottom of the ordinary steel belt module scheme is certain, and the area of the cell that can be adhered is certain, therefore, when the working condition is more severe, the structure adhesive has the risk of cracking.

[0031] In view of the above problems, the utility model provides a battery module 400 and a battery box 010, which can increase the bonding area between the cells 410, avoid the risk of battery box 010 failure caused by cracking of the heat-conducting structure adhesive, and thus can improve the above problems.

[0032] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0034] It should be noted that like reference numerals and letters refer to like items in the several views, and once an item is defined in one view, it should not be further defined and explained in subsequent views.

[0035] In the description of the utility model, it should be explained that if the terms such as ''upper'', ''lower'', ''inner'', ''outer'' and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore it cannot be understood as a limitation on the utility model.

[0036] In addition, if the terms ''first'', ''second'' and the like are used only for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0037] It should be explained that the features in the embodiments of the utility model can be combined with each other without conflict.

[0038] The overall structure, working principle and technical effects of the battery module 400 and the battery box 010 provided by the utility model will be described in detail below through embodiments and in combination with the drawings.

[0039] Please refer to Figure 1 The battery box 010 provided by the utility model is applied to the energy storage equipment of a new energy vehicle.

[0040] Among them, the new energy vehicle can be a large vehicle such as a heavy truck, a mine truck, etc. Of course, the energy storage equipment can also be used in some relatively harsh environments.

[0041] In this embodiment, the energy storage equipment includes a placing rack (not shown in the figure) and a plurality of battery boxes 010, and the battery boxes 010 are fixed on the placing rack.

[0042] Please refer to Figure 1 The battery box 010 provided by the utility model includes at least one battery module 400, and the at least one battery module 400 is arranged on a lower box body 100.

[0043] It can be understood that the lower box body 100 is coated with a glue, and the at least one battery module 400 is pressed into the lower box body 100, so that the glue fills the gap 430 and forms a first glue layer 440. Such arrangement increases the bonding area between the battery cells 410, improves the reliability of the battery cells 410 in the module, avoids the risk of battery box 010 failure caused by cracking of the heat-conducting structural glue, and at the same time can meet the use conditions of the mine truck.

[0044] In the embodiment, the battery box 010 comprises a lower box body 100.

[0045] In the embodiment, referring to Figure 1 , the lower box body 100 comprises a bottom plate 110, two side beams 120, a front wall 130 and a rear wall 140; wherein the bottom plate 110 is a rectangular plate structure, the bottom plate 110 comprises a first side, a second side, a third side and a fourth side, the first side and the third side are oppositely arranged, the second side and the fourth side are oppositely arranged, the two side beams 120 are arranged on the second side and the fourth side respectively, and the first side is arranged opposite to the front wall 130, and the third side is arranged opposite to the rear wall 140.

[0046] Referring to Figure 1 , the front wall 130 is provided with a mounting hole 131, and the mounting hole 131 is used for mounting a front electrical mounting plate 150.

[0047] Wherein, the top of the two side beams 120, the front wall 130 and the rear wall 140 are provided with L-shaped cantilever edges, and the cantilever edges are provided with first fixing holes.

[0048] Optionally, the bottom plate 110 and the two side beams 120 are integrally formed, and the bottom plate 110 is fixed with the front wall 130 and the rear wall 140 by a fixing member; the fixing member can be a threaded fixing member such as a bolt or a screw.

[0049] In the embodiment, the battery box 010 comprises an upper box body 200.

[0050] In the embodiment, referring to Figure 1 , the upper box body 200 is provided with a fixed edge extending outward around the periphery, and the fixed edge is provided with a plurality of second fixing holes, and the first fixing holes and the second fixing holes are oppositely arranged. Wherein, a plurality of threaded members are oppositely arranged through the first fixing holes and the second fixing holes, so as to fixedly connect the upper box body 200 and the lower box body 100.

[0051] It can be understood that the upper box body 200 and the lower box body 100 are sealingly connected to form an internal mounting cavity, and at least one battery module 400 is installed in the mounting cavity and fixedly connected to the bottom plate 110 of the lower box body 100 by a colloid.

[0052] In the embodiment, referring to Figure 1 , the upper box body 200 and the lower box body 100 are further sealingly connected with a sealing ring 300.

[0053] In the embodiment, referring to Figure 1 , the battery box 010 comprises at least one battery module 400.

[0054] Referring to Figures 2-5The utility model provides a battery module 400, include: at least two electric core 410, heat insulation pad 420, heat insulation pad 420 set up between adjacent electric core 410, the bottom of heat insulation pad 420 and the side wall of adjacent electric core 410 form gap 430, and the gap 430 is filled with first adhesive layer 440.

[0055] It can be understood that by pressing at least one battery module 400 into the lower box body 100, the gap 430 is filled with the adhesive coated on the lower box body 100 to form the first adhesive layer 440. The first adhesive layer 440 thus arranged increases the bonding area between the electric cores 410, improves the reliability of the fixation between the electric cores 410, avoids the risk of battery box 010 failure caused by cracking of the heat-conducting structural adhesive, and at the same time meets the use conditions of the mine truck.

[0056] In the embodiment, please refer to Figures 2-5 The battery module 400 includes at least two electric cores 410.

[0057] Alternatively, a single battery module 400 can include two, three, four, etc. number of electric cores 410, wherein the plurality of electric cores 410 are arranged in a column in sequence and are connected in series by a collection wire harness to form the battery module 400. The actual number of electric cores 410 used is selected according to actual use requirements, which is not limited in the embodiment.

[0058] In the embodiment, please refer to Figure 1 The battery module 400 further includes end plates 470, at least one steel band 480, and a pressing plate 490; wherein the at least two electric cores 410 are arranged in a column in sequence, and the at least two electric cores 410 are clamped between the two end plates 470; the at least two electric cores 410 and the two end plates 470 are bundled and fixed in the at least one steel band 480; the pressing plate 490 is abutted and arranged on the top surface of the at least two electric cores 410, and the two ends of the pressing plate 490 are fixed with the top of the two end plates 470, respectively.

[0059] In the embodiment, the steel band 480 includes two, and the two steel bands 480 bundle and fix the at least two electric cores 410 and the two end plates 470. Of course, in other embodiments, the steel band 480 can also be one, three, etc.

[0060] It can be understood that the end plates 470 are arranged at both ends of the at least two battery cells 410 to fix and limit the front and back movements of the at least two battery cells 410, and then the plastic steel bands 480 are wound around to bind and limit the movements of the at least two battery cells 410 in the four directions of front, back, left and right, and the fixed pressing plates 490 are abutted against the top surfaces of the at least two battery cells 410 to limit the up and down movements of the battery cells 410. In this way, even if the battery module 400 is in a relatively bumpy working environment, the battery cells 410 will not jump upward due to loosening of the steel bands 480, and the overall structure of the battery module 400 is simple and safe to use.

[0061] In this embodiment, the battery module 400 comprises the heat insulation pads 420.

[0062] In this embodiment, please refer to Figure 2 and Figure 3 The heat insulation pads 420 are arranged between the adjacent battery cells 410, the bottom of the heat insulation pad 420 and the side wall of the adjacent battery cell 410 form a gap 430, please refer to Figure 4 and Figure 5 The first glue layer 440 is filled in the gap 430.

[0063] It can be understood that the heat insulation pad 420 has a heat insulation effect, which can effectively insulate the heat transfer between the adjacent battery cells 410, so as to reduce the spread speed of thermal runaway, avoid stress concentration due to expansion of the battery cells 410, cause the battery cells 410 to cycle quickly, prolong the service life of the battery cells 410, and improve the use safety and working reliability of the battery cells 410.

[0064] In this embodiment, please refer to Figure 2 and Figure 3 The length of the bottom of the heat insulation pad 420 is reduced to form the gap 430 between the bottom of the heat insulation pad 420 and the side wall of the adjacent battery cell 410.

[0065] The length of the bottom of the heat insulation pad 420 is reduced to form the gap 430 between the bottom of the heat insulation pad 420 and the side wall of the adjacent battery cell 410.

[0066] The length of the bottom of the heat insulation pad 420 is reduced to form the gap 430 between the bottom of the heat insulation pad 420 and the side wall of the adjacent battery cell 410.

[0067] In this embodiment, the battery module 400 comprises one; wherein the glue is coated on the lower box body 100, and the battery module 400 is pressed into the lower box body 100, so that the glue fills the gap 430 and forms the first glue layer 440. At the same time, the glue between the bottom of the at least two battery cells 410 and the lower box body 100 forms the second glue layer 450.

[0068] In the embodiment, referring to Figure 4 and Figure 5 , the battery module 400 includes at least two, at least two battery modules 400 are fixed and electrically connected;Wherein, the glue is coated on the lower box 100, and the at least two battery modules 400 are pressed into the lower box 100, so that the glue fills the gap 430 and forms the first glue layer 440. Meanwhile, referring to Figure 6 and Figure 7 , the glue between the bottom of the at least two battery modules 400 and the lower box 100 forms the second glue layer 450. Meanwhile, referring to Figure 6 and Figure 7 , the glue between the adjacent battery modules 400 forms the third glue layer 460.

[0069] It is worth mentioning that the amount of glue coating of the glue is greater than the conventional amount, so that the gap 430 can be filled with the glue layer to form the first glue layer 440.

[0070] Wherein, the glue can be structural glue, heat-conducting structural glue, etc.

[0071] The manufacturing process of the battery module 400 and the battery box 010 provided by the embodiment of the utility model is as follows: in the embodiment, three groups of battery modules 400 are taken as an example, referring to Figure 1 .

[0072] The glue is coated on the lower box 100, the amount of glue coating of the coated glue is greater than the conventional amount, and the three groups of battery modules are pressed into the lower box 100, so that the glue fills the gap 430 between the adjacent battery modules 400 and forms the first glue layer 440. Meanwhile, the glue between the bottom of the battery module 400 and the lower box 100 forms the second glue layer 450. Meanwhile, the glue between the adjacent battery modules 400 forms the third glue layer 460.

[0073] In summary, the battery module 400 and the battery box 010 provided by the embodiment of the utility model, by forming the gap 430 between the bottom of the heat insulation pad 420 and the side wall of the adjacent battery module 410, the glue coated on the lower box 100 fills the gap 430 and forms the first glue layer 440. By such setting, the bonding area between the battery modules 400 is increased, the reliability of the fixed battery modules 400 is improved, the risk of the battery box 010 failure caused by the cracking of the heat-conducting structural glue is avoided, and the use working condition of the mine truck can be met.

[0074] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A battery module, characterized by, The battery module comprises: at least two battery cells; a thermal insulation pad arranged between adjacent battery cells, a gap being formed between the bottom of the thermal insulation pad and the side wall of the adjacent battery cells, and the gap being filled with a first adhesive layer.

2. The battery module of claim 1, wherein, The height of the gap is in the range of 15-25mm.

3. The battery module of claim 1, wherein, The width of the gap is in the range of 1-3mm.

4. The battery module of claim 1, wherein, The battery module further comprises end plates, and the at least two battery cells are sandwiched between the two end plates. The battery module further comprises at least one steel band, and the at least two battery cells and the two end plates are fixed in the at least one steel band.

5. The battery module of claim 4, wherein, The battery module further comprises a pressing plate abutting the top surface of the at least two battery cells, and the two ends of the pressing plate are fixed to the top of the two end plates.

6. A battery box characterized by The battery module comprises: at least one battery module according to any one of claims 1-5; a lower box, and at least one battery module is arranged on the lower box.

7. The battery pack of claim 6, wherein, An adhesive is coated on the lower box, and at least one battery module is pressed into the lower box, so that the adhesive fills the gap and forms the first adhesive layer.

8. The battery pack of claim 7, wherein, The adhesive between the bottom of the at least two battery cells and the lower box forms a second adhesive layer.

9. The battery pack of claim 7, wherein, The battery module comprises at least two battery modules, and the at least two battery modules are fixed and electrically connected. The adhesive between adjacent battery modules forms a third adhesive layer.

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