Battery module and energy storage device

Abstract

The utility model discloses a battery module and an energy storage device, the battery module comprises a battery cell, an integrated cover plate and a collection wire harness, the battery cell is provided with an explosion venting valve, the integrated cover plate is provided with an explosion venting through hole opposite to the explosion venting valve, and the collection wire harness is located at one side, far away from the battery cell, of the integrated cover plate; the battery module further comprises at least one of a first fireproof thermal insulation layer and a second fireproof thermal insulation layer; the first fireproof heat insulation layer is arranged on one side, far away from the battery cell, of the integrated cover plate, the first fireproof heat insulation layer covers the explosion venting through hole, and the collection wire harness is laid on the first fireproof heat insulation layer; the second fireproof heat insulation layer is arranged on the side, away from the integrated cover plate, of the collection wire harness. According to the battery module, through at least one of the first fireproof heat-insulating layer and the second fireproof heat-insulating layer, the probability of short-circuit fire caused by a battery cell spraying valve is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly to a battery module and an energy storage device. BACKGROUND

[0002] At present, the capacity of the battery cell of the battery module is increasing, and the battery cells of the battery module are arranged more compactly, and the risk of thermal runaway is more likely to occur.

[0003] After the battery module is in thermal runaway, the battery cell sprays the valve, that is, the battery cell sprays the electrolyte. The sprayed electrolyte can contact the collection harness, causing a short circuit and fire.

[0004] In summary, how to reduce the probability of a short circuit and fire caused by the battery cell spraying the valve is a problem that needs to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the purpose of the present application is to provide a battery module and an energy storage device to reduce the probability of a short circuit and fire caused by the battery cell spraying the valve.

[0006] In order to achieve the above purpose, the present application provides the following technical solutions:

[0007] A battery module, comprising: a battery cell, an integrated cover plate, and a collection harness, the battery cell having a pressure relief valve, the integrated cover plate being provided with a pressure relief through hole opposite the pressure relief valve, and the collection harness being located on a side of the integrated cover plate away from the battery cell;

[0008] The battery module further comprises at least one of a first fireproof and heat insulation layer and a second fireproof and heat insulation layer; the first fireproof and heat insulation layer is arranged on a side of the integrated cover plate away from the battery cell, the first fireproof and heat insulation layer covers the pressure relief through hole, and the collection harness is laid on the first fireproof and heat insulation layer; and the second fireproof and heat insulation layer is arranged on a side of the collection harness away from the integrated cover plate.

[0009] In some possible embodiments, the battery module further comprises a tab, the tab being arranged on the cover plate, the tab being used for electrically connecting with an electrode of the battery cell, and the collection harness is electrically connected with the tab.

[0010] In some possible embodiments, the integrated cover plate corresponds to at least two rows of battery cells, and the tab is at least four rows, and each two rows of tabs are used for corresponding to one row of battery cells.

[0011] At least one row of tabs is a first tab, at least one row of tabs is a second tab, the first tab and the second tab are adjacent and used for corresponding to different rows of battery cells.

[0012] The integrated cover plate is provided with a partition structure distributed between the first pole piece and the second pole piece, and the partition structure separates the first pole piece and the second pole piece.

[0013] In some possible embodiments, the partition structure is a partition hole capable of being opposite and communicating with the first gap between the two adjacent rows of the battery cells.

[0014] In some possible embodiments, the battery module further comprises a liquid cooling plate located at an end of the battery cell away from the integrated cover plate, and the liquid cooling plate is provided with a liquid cooling plate through hole located between the two adjacent rows of the battery cells and communicating with the first gap and the partition hole.

[0015] In some possible embodiments, the partition structure is a partition groove.

[0016] In some possible embodiments, the partition structure is a partition component, which is a fireproof and heat insulation component, and the partition component penetrates through the integrated cover plate or is fixed to one side of the integrated cover plate provided with the pole piece.

[0017] In some possible embodiments, any two rows of the pole pieces are sequentially distributed along a first direction; in each row of the pole pieces, any two pole pieces are sequentially distributed along a second direction; in the second direction, the partition structure is at least two; and in the second direction, a second gap is present between the two adjacent partition structures.

[0018] In some possible embodiments, the second fireproof and heat insulation layer covers the collection harness.

[0019] In some possible embodiments, the first fireproof and heat insulation layer comprises at least one of a mica paper layer, an aerogel layer or a ceramicized silicone rubber layer, and the second fireproof and heat insulation layer comprises at least one of a mica paper layer, an aerogel layer or a ceramicized silicone rubber layer.

[0020] Based on the above-provided battery module, the application further provides a power storage device, which comprises the battery module according to any one of the above embodiments.

[0021] In the battery module provided by the application, when the battery module comprises a first fireproof and heat insulation layer and the battery cell spray valve, the electrolyte sprayed from the pressure relief valve is sprayed onto the first fireproof and heat insulation layer through the pressure relief through hole, so that the first fireproof and heat insulation layer reduces the probability of electrolyte spraying onto the collection harness, and the first fireproof and heat insulation layer has fireproof and heat insulation performance, isolates the electrolyte, and thus protects the collection harness and reduces the probability of short circuit and fire of the collection harness caused by the battery cell spray valve, i.e., reduces the probability of short circuit and fire caused by the battery cell spray valve.

[0022] In the battery module provided in this application, when the battery module includes a second fireproof and heat-insulating layer and a cell spray valve, the electrolyte sprayed from the explosion relief valve is sprayed through the explosion relief hole onto the acquisition harness adjacent to the explosion relief valve. The second fireproof and heat-insulating layer has fireproof and heat-insulating properties. The second fireproof and heat-insulating layer isolates the electrolyte, which can prevent the electrolyte from spreading to other locations and reduce the probability of the electrolyte reaching other acquisition harnesses. This allows the second fireproof and heat-insulating layer to protect other acquisition harnesses and reduces the probability of the acquisition harnesses short-circuiting and catching fire due to the cell spray valve, that is, it reduces the probability of short-circuiting and catching fire caused by the cell spray valve.

[0023] In the battery module provided in this application, when the battery module includes a first fireproof and heat-insulating layer and a second fireproof and heat-insulating layer, and a cell spray valve, both the first fireproof and heat-insulating layer and the second fireproof and heat-insulating layer reduce the probability of short circuit fire caused by the cell spray valve.

[0024] As can be seen from the above, the battery module provided in this application reduces the probability of short circuit fire caused by the cell spray valve by at least one of the first fireproof and heat-insulating layer and the second fireproof and heat-insulating layer. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a battery module provided in an embodiment of this application;

[0027] Figure 2 An exploded view of a structure for integrating a busbar assembly in a battery module provided in this application embodiment;

[0028] Figure 3 This is a schematic diagram of the structure of the integrated cover plate in the battery module provided in the embodiments of this application;

[0029] Figure 4 An exploded view of another structure of the integrated busbar assembly in the battery module provided in the embodiments of this application;

[0030] Figure 5 A schematic diagram of a partition structure in a battery module provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of another structure of the partition structure in the battery module provided in the embodiment of this application;

[0032] Figure 7 Another structural schematic view of the partition structure in the battery module provided by the embodiment of the present application is provided.

[0033] Figure 8 Another structural schematic view of the partition structure in the battery module provided by the embodiment of the present application is provided.

[0034] Explanation of reference signs:

[0035] 100 is a battery module, 10 is an integrated busbar assembly, 20 is an electric core, 30 is a first gap, and 40 is a liquid cooling plate.

[0036] 11 is a collection wire harness, 12 is a pole piece, 12a is a first pole piece, 12b is a second pole piece, 13 is an integrated cover plate, 131 is a blast venting through hole, 132 is a first mounting position, 133 is a second mounting position, 14 is a first fireproof and heat insulation layer, 15 is a second fireproof and heat insulation layer, 16 is a first hot riveting column, 17 is a second hot riveting column, 18 is a partition structure, 18a is a partition hole, 18b is a partition component, and 18c is a partition groove.

[0037] 41 is a liquid cooling plate through hole. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing the specific embodiments, and are not intended to be limiting on the present application. As used in the specification and the appended claims of the present application, the singular forms “a,” “an,” “said,” “the,” “above,” “this,” and “that” are intended to include, for example, the expression “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the embodiments of the present application, “one or more” means one, two, or more than two; “and / or” describes the association relationship of the associated objects, which means that there can be three relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, wherein A and B can be singular or plural. The character “ / ” generally represents an “or” relationship between the associated objects.

[0040] Reference within the specification to "one embodiment" or "an embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" within the specification are not necessarily all referring to the same embodiment, however, it is contemplated that the features, structures, or characteristics of one embodiment can be combined with those of another embodiment.

[0041] The plurality of embodiments of the present application refers to greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating or implying order.

[0042] The "parallel" and "perpendicular" referred to in the present application are "substantially parallel" and "substantially perpendicular" in actual operation. "Substantially parallel" can be understood as parallel with some error, and similarly, "substantially perpendicular" can be understood as perpendicular with some error.

[0043] The embodiments of the present application provide a battery module and an energy storage device to reduce the probability of short circuit and fire caused by valve jumping of battery cells.

[0044] The structure of the battery module will be described in detail below.

[0045] As shown in Figure 1 The battery module 100 provided by the embodiments of the present application includes an integrated busbar assembly 10 and a battery cell 20.

[0046] The battery cell 20 is a plurality of battery cells 20, which are distributed along two rows. The two rows of battery cells 20 are distributed along a first direction in turn, and the plurality of battery cells 20 in each row are distributed along a second direction in turn. It should be noted that the first direction and the second direction have an included angle. In the case of a square battery cell 20, the first direction is perpendicular to the second direction.

[0047] In actual situations, the plurality of battery cells 20 can also be distributed along one row or more than three rows, and the distribution direction can refer to the direction of the two rows of distribution.

[0048] As shown in Figures 5-8As shown, in the case where the battery cells 20 are distributed in multiple rows, there is a first gap 30 between two adjacent rows of battery cells 20. The size of the first gap 30 is selected according to actual conditions, and embodiments of the present application do not limit this. In actual conditions, the two adjacent rows of battery cells 20 can also be in direct contact, which can be understood as that there is no first gap 30 between the two adjacent rows of battery cells 20.

[0049] One end of the battery cell 20 is provided with a vent valve (not shown in the figure) and two electrodes (not shown in the figure), and the vent valve is located between the two electrodes. As shown in Figure 5 and Figure 7 As shown, the other end of the battery cell 20 can be provided with a liquid cooling plate 40, which exchanges heat with the battery cell 20 to dissipate heat of the battery cell 20. Of course, the other end of the battery cell 20 can also not be provided with the liquid cooling plate 40, and the battery cell 20 can dissipate heat in other ways.

[0050] As shown in Figure 1 The integrated busbar assembly 10 is arranged at the end of the battery cell 20 with the electrodes and the vent valve. Exemplarily, the integrated busbar assembly 10 is welded to the battery cell 20.

[0051] The specific structure of the integrated busbar assembly 10 will be described below.

[0052] As shown in Figure 2 The integrated busbar assembly 10 provided by the embodiments of the present application includes a collection wire harness 11, a pole piece 12, and an integrated cover plate 13. It should be noted that the battery module 100 can also be understood as including the collection wire harness 11, the pole piece 12, and the integrated cover plate 13.

[0053] The integrated cover plate 13 is laid on the end of all the battery cells 20, and the integrated cover plate 13 is provided with a vent hole 131 corresponding to the vent valve. It should be noted that the vent valve and the vent hole 131 correspond one-to-one.

[0054] The pole piece 12 is arranged on the integrated cover plate 13, and the pole piece 12 is electrically connected with the electrodes of the battery cell 20 to realize electrical connection of the pole piece 12 with two adjacent battery cells 20, thereby realizing series and parallel connection of all the battery cells 20.

[0055] As shown in Figure 3 The integrated cover plate 13 has a first mounting position 132, the first mounting position 132 corresponds to the pole piece 12 one-to-one, and the pole piece 12 is arranged in the first mounting position 132.

[0056] In actual conditions, therefore, the battery cells 20 can also be electrically connected by other conductive components, and are not limited to the pole piece 12.

[0057] The collection wire harness 11 and the pole piece 12 are electrically connected to collect signals of the battery cell 20. The collection wire harness 11 can be a flexible printed circuit (FPC), a flexible flat cable (FFC), or a printed circuit board (PCB). The embodiments of the present application do not limit the type of the collection wire harness 11.

[0058] It should be noted that, in the case where the pole piece 12 is replaced by other conductive components, the collection wire harness 11 is electrically connected to the conductive components replacing the pole piece 12.

[0059] The collection wire harness 11 is arranged on the integrated cover plate 13, as shown in Figure 3 The integrated cover plate 13 has a second mounting position 133, and the collection wire harness 11 is arranged on the second mounting position 133.

[0060] As described above, one end of the battery cell 20 is provided with a valve and two electrodes, the valve is located between the two electrodes, in order to facilitate the arrangement of the pole piece 12, the pole piece 12 is opposite to the electrodes of the battery cell 20, and the collection wire harness 11 is opposite to the valve.

[0061] After the battery module 100 is in thermal runaway, the valve of the battery cell 20 is opened, the battery cell 20 sprays electrolyte, and the sprayed electrolyte can contact the collection wire harness 11 to cause short circuit and fire.

[0062] In order to reduce the probability of short circuit and fire caused by the valve of the battery cell 20, the above-mentioned integrated busbar assembly 10 further comprises a first fireproof and heat insulation layer 14, and it can be understood that the battery module 100 further comprises the first fireproof and heat insulation layer 14.

[0063] The first fireproof and heat insulation layer 14 is arranged on the integrated cover plate 13, and the first fireproof and heat insulation layer 14 is located on the side of the integrated cover plate 13 away from the battery cell 20. The first fireproof and heat insulation layer 14 covers the valve through hole 131, and the collection wire harness 11 is arranged on the first fireproof and heat insulation layer 14. It should be noted that the first fireproof and heat insulation layer 14 and the collection wire harness 11 are both arranged on the second mounting position 133 of the integrated cover plate 13.

[0064] In the case where the valve of the battery cell 20 is opened, the electrolyte sprayed from the valve is sprayed onto the first fireproof and heat insulation layer 14 through the valve through hole 131, the first fireproof and heat insulation layer 14 reduces the probability of the electrolyte being sprayed onto the collection wire harness 11, and the first fireproof and heat insulation layer 14 has fireproof and heat insulation performance, the first fireproof and heat insulation layer 14 isolates the electrolyte, so that the first fireproof and heat insulation layer 14 protects the collection wire harness 11, and reduces the probability of short circuit and fire of the collection wire harness 11 caused by the valve of the battery cell 20, that is, reduces the probability of short circuit and fire caused by the valve of the battery cell 20.

[0065] The material of the first fireproof and heat-insulating layer 14 is selected according to the actual situation. For example, the first fireproof and heat-insulating layer 14 includes at least one of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer. When the first fireproof and heat-insulating layer 14 includes at least two of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer, at least two of the mica paper layer, aerogel layer, or ceramicized silicone rubber layer can be selected and distributed sequentially along the thickness direction of the first fireproof and heat-insulating layer 14.

[0066] The thickness of the first fireproof and heat-insulating layer 14 can be selected according to the actual situation, and this application embodiment does not limit it.

[0067] Combination Figure 2 and Figure 3 As shown, to facilitate the installation of the first fireproof and heat-insulating layer 14 and the data acquisition harness 11, the first fireproof and heat-insulating layer 14 can be bonded to the integrated cover plate 13. Both the data acquisition harness 11 and the first fireproof and heat-insulating layer 14 are then heat-riveted to the integrated cover plate 13 using the first hot-riveting post 16. In this way, the first fireproof and heat-insulating layer 14 is first bonded to the integrated cover plate 13, then the data acquisition harness 11 is laid flat on top of the first fireproof and heat-insulating layer 14, and finally, the data acquisition harness 11, the first fireproof and heat-insulating layer 14, and the integrated cover plate 13 are heat-riveted together using the first hot-riveting post 16. Because the first fireproof and heat-insulating layer 14 is bonded to the integrated cover plate 13, movement of the first fireproof and heat-insulating layer 14 during subsequent hot-riveting is avoided, improving installation reliability and efficiency.

[0068] The first fireproof and heat-insulating layer 14 may have an adhesive backing for bonding to the integrated cover plate 13. Alternatively, adhesive may be applied to the back of the first fireproof and heat-insulating layer 14 for bonding to the integrated cover plate 13.

[0069] In the above embodiments, in order to facilitate the installation of the electrode 12, the electrode 12 can be fixed by hot riveting the second hot riveting post 17 and the integrated cover plate 13.

[0070] In practice, the first fireproof and heat-insulating layer 14, the acquisition wire harness 11, and the electrode 12 can also be fixed to the integrated cover plate 13 in other ways, such as welding or bonding. This application embodiment does not limit this.

[0071] In this embodiment, the portion of the data acquisition harness 11 on the integrated cover plate 13 is entirely on the first fireproof and heat-insulating layer 14, or the portion of the data acquisition harness 11 on the integrated cover plate 13 is partially on the first fireproof and heat-insulating layer 14. To improve the protective effect of the first fireproof and heat-insulating layer 14, the portion of the data acquisition harness 11 on the integrated cover plate 13 can be entirely on the first fireproof and heat-insulating layer 14.

[0072] In this embodiment, if the pressure relief of the battery cell 20 is too high, the amount of electrolyte ejected will be excessive. This will cause some electrolyte to bypass the first fireproof and heat-insulating layer 14 and spray onto the data collection harness 11 from the end of the first fireproof and heat-insulating layer 14 away from the integrated cover plate 13 and from the side of the first fireproof and heat-insulating layer 14, which may still cause a short circuit and fire. Figure 4 As shown, in order to further reduce the probability of short circuit fire caused by the spray valve of the battery cell 20, the integrated busbar assembly 10 also includes a second fireproof and heat-insulating layer 15, which can be understood as: the battery module 100 also includes a second fireproof and heat-insulating layer 15.

[0073] The second fireproof and heat-insulating layer 15 is located on the side of the data acquisition harness 11 away from the integrated cover plate 13. This can be understood as the second fireproof and heat-insulating layer 15 being located on the side of the data acquisition harness 11 away from the first fireproof and heat-insulating layer 14. When the battery cell 20 is depressurized and the pressure relief of the battery cell 20 is excessive, the electrolyte sprayed from the depressurization valve will bypass the first fireproof and heat-insulating layer 14 and spray onto the second fireproof and heat-insulating layer 15, preventing the electrolyte from directly spraying onto the data acquisition harness 11. Furthermore, the second fireproof and heat-insulating layer 15 has fireproof and heat-insulating properties, isolating the electrolyte and thus protecting the data acquisition harness 11. This further reduces the probability of the data acquisition harness 11 short-circuiting and catching fire due to the battery cell 20 depressurization valve, i.e., reduces the probability of a short circuit and fire caused by the battery cell 20 depressurization valve.

[0074] Meanwhile, if the first fireproof and heat-insulating layer 14 fails or other reasons cause the acquisition harness 11 on the first fireproof and heat-insulating layer 14 to come into contact with the electrolyte, the second fireproof and heat-insulating layer 15, which has fireproof and heat-insulating properties, isolates the electrolyte and prevents it from spreading to other locations. This reduces the probability of the electrolyte reaching other acquisition harnesses 11, thus protecting other acquisition harnesses 11 and reducing the probability of the acquisition harness 11 short-circuiting and catching fire due to the cell spray valve, i.e., reducing the probability of short-circuiting and catching fire caused by the cell 20 spray valve.

[0075] The material of the second fireproof and heat-insulating layer 15 is selected according to the actual situation. For example, the second fireproof and heat-insulating layer 15 includes at least one of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer. When the second fireproof and heat-insulating layer 15 includes at least two of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer, at least two of the mica paper layer, aerogel layer, or ceramicized silicone rubber layer can be selected and distributed sequentially along the thickness direction of the second fireproof and heat-insulating layer 15.

[0076] The materials of the first fireproof and heat-insulating layer 14 and the second fireproof and heat-insulating layer 15 can be the same or different, and this application embodiment does not limit this.

[0077] The thickness of the second fireproof and thermal insulation layer 15 is selected according to actual conditions, and embodiments of the present application do not limit this.

[0078] In order to facilitate the installation of the first fireproof and thermal insulation layer 14, the second fireproof and thermal insulation layer 15 and the collection wire harness 11, the first fireproof and thermal insulation layer 14 can be selected to be bonded to the integrated cover plate 13, the second fireproof and thermal insulation layer 15 can be selected to be bonded to the collection wire harness 11, and the second fireproof and thermal insulation layer 15, the collection wire harness 11 and the first fireproof and thermal insulation layer 14 can all be fixed by the first hot riveting column 16 and the integrated cover plate 13. In this way, the first fireproof and thermal insulation layer 14 is first bonded to the integrated cover plate 13, the collection wire harness 11 is then laid on the first fireproof and thermal insulation layer 14, the second fireproof and thermal insulation layer 15 is then bonded to the collection wire harness 11, and finally the second fireproof and thermal insulation layer 15, the collection wire harness 11 and the first fireproof and thermal insulation layer 14 are fixed by the first hot riveting column 16 and the integrated cover plate 13. Since the first fireproof and thermal insulation layer 14 is bonded to the integrated cover plate 13 and the second fireproof and thermal insulation layer 15 is bonded to the collection wire harness 11, the first fireproof and thermal insulation layer 14 and the second fireproof and thermal insulation layer 15 are prevented from moving during subsequent hot riveting and fixing, installation reliability is improved, and installation efficiency is also improved.

[0079] The second fireproof and thermal insulation layer 15 itself can have adhesive on the back side to bond with the integrated cover plate 13. Of course, the back side of the second fireproof and thermal insulation layer 15 can also be coated with adhesive to bond with the integrated cover plate 13.

[0080] In actual conditions, the second fireproof and thermal insulation layer 15 can also be fixed on the integrated cover plate 13 by other means, such as welding or bonding, and embodiments of the present application do not limit this.

[0081] In embodiments of the present application, the second fireproof and thermal insulation layer 15 can cover the collection wire harness 11, or part of the second fireproof and thermal insulation layer 15 and part of the collection wire harness 11 overlap, and part of the second fireproof and thermal insulation layer 15 and part of the collection wire harness 11 do not overlap. It should be noted that "cover" means complete coverage. In order to improve the protection effect of the second fireproof and thermal insulation layer 15, the second fireproof and thermal insulation layer 15 covers the collection wire harness 11.

[0082] As described above, the integrated cover plate 13 is laid at the end of all the battery cells 20. In the case of at least two rows of battery cells 20, the integrated cover plate 13 corresponds to at least two rows of battery cells 20, and the pole piece 12 is at least four rows, and each two rows of pole pieces 12 are used to correspond to one row of battery cells 20.

[0083] It should be noted that the distance between the two rows of pole pieces 12 corresponding to the same row of battery cells 20 is far (because there is a collection wire harness 11 between the two rows of pole pieces 12), and the distance between the two rows of pole pieces 12 corresponding to different rows of battery cells 20 and adjacent to each other is close. For ease of description, at least one row of pole pieces 12 is a first pole piece 12a, at least one row of pole pieces 12 is a second pole piece 12b, and the first pole piece 12a and the second pole piece 12b are adjacent and used to correspond to different rows of battery cells 20. In this way, the distance between the first pole piece 12a and the second pole piece 12b is close.

[0084] Since the distance between the first pole piece 12a and the second pole piece 12b is close, the first pole piece 12a and the second pole piece 12b are more likely to be shorted by the electrolyte sprayed out, which can also cause a short circuit fire. As shown in Figure 3 、 Figure 5 and Figure 6 To solve this technical problem, the integrated cover plate 13 is provided with a partition structure 18, the partition structure 18 is distributed between the first pole piece 12a and the second pole piece 12b, and the partition structure 18 separates the first pole piece 12a and the second pole piece 12b. In this way, by separating the first pole piece 12a and the second pole piece 12b through the partition structure 18, the partition structure 18 can block the electrolyte from flowing from the first pole piece 12a to the second pole piece 12b and from the second pole piece 12b to the first pole piece 12a, thereby avoiding the first pole piece 12a and the second pole piece 12b being shorted by the electrolyte and causing a fire.

[0085] As shown in Figure 5 In some embodiments, the partition structure 18 is a partition hole 18a, and the partition hole 18a can be opposite and communicate with the first gap 30 between the two adjacent rows of battery cells 20. In this way, by guiding the electrolyte during thermal runaway through the partition hole 18a and into the first gap 30, the accumulation of electrolyte on the integrated cover plate 13 is avoided, thereby avoiding the electrolyte flowing from the first pole piece 12a to the second pole piece 12b and from the second pole piece 12b to the first pole piece 12a, and thereby avoiding the first pole piece 12a and the second pole piece 12b being shorted by the electrolyte and causing a fire.

[0086] In the case where the battery module 100 includes a liquid cooling plate 40, the liquid cooling plate 40 is located at the end of the battery cell 20 away from the integrated cover plate 13, the liquid cooling plate 40 is provided with a liquid cooling plate through hole 41, the liquid cooling plate through hole 41 is located between the two adjacent rows of battery cells 20, and the liquid cooling plate through hole 41 is communicated through the first gap 30 and the partition hole 18a. In this way, the electrolyte can be discharged through the liquid cooling plate through hole 41, and the accumulation of electrolyte on the liquid cooling plate 40 can be avoided, thereby reducing the probability of the electrolyte causing a short circuit of the shell of the battery cell 20.

[0087] As shown in Figure 6As shown in some other embodiments, the partition structure 18 can also be a partition groove 18c, so that the electrolyte in thermal runaway is accommodated by the partition groove 18c, thereby avoiding the electrolyte flowing from the first pole piece 12a to the second pole piece 12b and the electrolyte flowing from the second pole piece 12b to the first pole piece 12a, thereby avoiding the first pole piece 12a and the second pole piece 12b being short-circuited by the electrolyte and catching fire.

[0088] As shown in some other embodiments, the partition structure 18 can also be a partition groove 18c, so that the electrolyte in thermal runaway is accommodated by the partition groove 18c, thereby avoiding the electrolyte flowing from the first pole piece 12a to the second pole piece 12b and the electrolyte flowing from the second pole piece 12b to the first pole piece 12a, thereby avoiding the first pole piece 12a and the second pole piece 12b being short-circuited by the electrolyte and catching fire. Figure 7 Figure 8 As shown in some other embodiments, the partition structure 18 can also be a partition groove 18c, so that the electrolyte in thermal runaway is accommodated by the partition groove 18c, thereby avoiding the electrolyte flowing from the first pole piece 12a to the second pole piece 12b and the electrolyte flowing from the second pole piece 12b to the first pole piece 12a, thereby avoiding the first pole piece 12a and the second pole piece 12b being short-circuited by the electrolyte and catching fire.

[0089] The partition member 18b can penetrate the integrated cover plate 13. As shown in some other embodiments, Figure 7 The partition member 18b penetrates the integrated cover plate 13, and can be connected with the liquid cooling plate 40 or not connected with the liquid cooling plate 40, which is selected according to actual conditions. The battery module 100 can also not include the liquid cooling plate 40.

[0090] In actual conditions, the partition member 18b can not penetrate the integrated cover plate 13. As shown in some other embodiments, Figure 8 The partition member 18b is fixed to one side of the integrated cover plate 13 where the pole piece 12 is arranged. In this case, the partition member 18b can be a partition plate or a partition protrusion.

[0091] The partition member 18b and the integrated cover plate 13 are in an integrated structure or a split structure, which is selected according to actual conditions, and the embodiments of the present application do not limit this.

[0092] ​As described above, any two rows of the electrode pieces 12 are arranged in the first direction in sequence; in each row of the electrode pieces 12, any two electrode pieces 12 are arranged in the second direction in sequence. The separation structure 18 between a row of the first electrode pieces 12a and a row of the second electrode pieces 12b can be one or more than two. In the case of one separation structure 18, the separation structure 18 extends from one end to the other end of the integrated cover plate 13 in the second direction. In the case of more than two separation structures 18, there is a second gap between adjacent two separation structures 18 in the second direction. Since the thickness of the integrated cover plate 13 is small, in order to ensure the strength of the integrated cover plate 13, the separation structure 18 can be more than two in the second direction; there is a second gap between adjacent two separation structures 18 in the second direction. Further, the separation structures 18 arranged in the second direction in sequence are referred to as a row of the separation structures 18; the separation structures 18 in a row of the separation structures 18 and the first electrode pieces 12a in a row of the first electrode pieces 12a correspond to each other one by one; the separation structures 18 in a row of the separation structures 18 and the second electrode pieces 12b in a row of the second electrode pieces 12b correspond to each other one by one.

[0093] In order to improve the separation effect of the separation structure 18, the length of the separation structure 18 in the second direction is not less than the length of the electrode piece 12 adjacent to the separation structure 18. Further, the length of the separation structure 18 is equal to the length of the electrode piece 12 adjacent to the separation structure 18.

[0094] It should be noted that in the case that there is a second gap between adjacent two separation structures 18 in the second direction, this embodiment is applicable to the case that the separation structure 18 is the separation hole 18a, the separation component 18b or the separation groove 18c.

[0095] The integrated busbar assembly 10 provided by the embodiment of the present application can further include the second fireproof and heat insulation layer 15 and does not include the first fireproof and heat insulation layer 14; in this case, the electrolyte sprayed from the explosion venting valve is sprayed onto the collection wire harness 11 adjacent to the explosion venting valve through the explosion venting through hole 131; the second fireproof and heat insulation layer 15 has the fireproof and heat insulation performance, the second fireproof and heat insulation layer 15 isolates the electrolyte, can prevent the electrolyte from spreading to other positions, can reduce the probability of the electrolyte reaching other collection wire harnesses 11, so that the second fireproof and heat insulation layer 15 protects other collection wire harnesses 11, and reduces the probability of the collection wire harness 11 being short-circuited and on fire due to the valve of the battery cell 20, that is, reduces the probability of the short-circuiting and the fire caused by the valve of the battery cell 20.

[0096] Based on the above, the integrated busbar assembly 10 includes at least one of the first fireproof and heat insulation layer 14 and the second fireproof and heat insulation layer 15, and can reduce the probability of the short-circuiting and the fire caused by the valve of the battery cell 20.

[0097] It should be noted that the integrated busbar assembly 10 mentioned in the foregoing is a general term of the acquisition harness 11, the pole piece 12, the integrated cover plate 13, the first fireproof and heat insulation layer 14, the second fireproof and heat insulation layer 15, the first hot riveting column 16, the second hot riveting column 17 and other components. The integrated busbar assembly 10 is only for the convenience of description and should not be understood as a limitation on the technical solutions provided by the embodiments of the present application.

[0098] The embodiments of the present application further provide a storage energy device, which comprises the battery module 100 provided by the above embodiments.

[0099] The storage energy device can be a storage energy cabinet, a storage energy container or the like, and the embodiments of the present application do not limit the type of the storage energy device.

[0100] Since the battery module 100 provided by the above embodiments has the above technical effects, the storage energy device provided by the embodiments of the present application comprises the battery module 100 provided by the above embodiments, and the storage energy device provided by the embodiments of the present application also has corresponding technical effects, which will not be described here.

[0101] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery module, characterized in that, include: The battery cell, the integrated cover plate, and the data acquisition harness are provided. The battery cell has an explosion relief valve, the integrated cover plate is provided with an explosion relief through hole opposite to the explosion relief valve, and the data acquisition harness is located on the side of the integrated cover plate away from the battery cell. The battery module further includes at least one of a first fireproof and heat-insulating layer and a second fireproof and heat-insulating layer; the first fireproof and heat-insulating layer is disposed on the side of the integrated cover plate away from the battery cell, the first fireproof and heat-insulating layer covers the explosion vent hole, and the data acquisition harness is laid on the first fireproof and heat-insulating layer; the second fireproof and heat-insulating layer is disposed on the side of the data acquisition harness away from the integrated cover plate.

2. The battery module according to claim 1, characterized in that, It also includes an electrode plate disposed on the cover plate, the electrode plate being used for electrical connection with the electrode of the battery cell, and the acquisition harness being electrically connected to the electrode plate.

3. The battery module according to claim 2, characterized in that, The integrated cover plate corresponds to at least two rows of the battery cells, and the electrode plates are at least four rows, with each two rows of electrode plates corresponding to one row of the battery cells. Wherein, at least one row of the electrode plates is a first electrode plate, at least one row of the electrode plates is a second electrode plate, the first electrode plate and the second electrode plate are adjacent to each other and are used to correspond to different rows of the battery cells; The integrated cover plate is provided with a partition structure, which is distributed between the first electrode and the second electrode, and the partition structure separates the first electrode and the second electrode.

4. The battery module according to claim 3, characterized in that, The partition structure is a partition hole, which is opposite to and connected to the first gap between two adjacent rows of battery cells.

5. The battery module according to claim 4, characterized in that, It also includes a liquid cooling plate, which is located at the end of the battery cell away from the integrated cover plate. The liquid cooling plate is provided with a liquid cooling plate through hole, which is located between two adjacent rows of battery cells, and the liquid cooling plate through hole is connected to the partition hole through the first gap.

6. The battery module according to claim 3, characterized in that, The partition structure is a partition groove.

7. The battery module according to claim 3, characterized in that, The partition structure is a partition component, which is a fireproof and heat-insulating component. The partition component penetrates the integrated cover plate, or the partition component is fixed to the side of the integrated cover plate where the electrode plate is located.

8. The battery module according to any one of claims 3-7, characterized in that, Any two rows of the electrode sheets are distributed sequentially along a first direction; in each row of the electrode sheets, any two electrode sheets are distributed sequentially along a second direction; in the second direction, there are at least two partition structures; and in the second direction, there is a second gap between two adjacent partition structures.

9. The battery module according to claim 1, characterized in that, The second fireproof and heat-insulating layer covers the data acquisition harness.

10. The battery module according to claim 1, characterized in that, The first fireproof and heat-insulating layer includes at least one of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer, and the second fireproof and heat-insulating layer includes at least one of a mica paper layer, an aerogel layer, or a ceramicized silicone rubber layer.

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

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