Battery module, energy storage system and electric device

Abstract

The utility model belongs to the technical field of batteries, and relates to a battery module, an energy storage system and an electric device. The battery module comprises a main body provided with an accommodating cavity; the plurality of battery cells comprise tabs, and the plurality of battery cells are distributed in the accommodating cavity at intervals; each connecting piece comprises a mounting part and a connecting part protruding out of the mounting part; the multiple connecting pieces are connected to the fixing piece, and the connecting parts penetrate through the fixing piece; the fixing piece is connected to the main body and seals the accommodating cavity, and the tab is connected to the connecting part at the opposite position. Due to the fact that the multiple connecting pieces are connected to the fixing piece, when the battery module is assembled, the connecting pieces and the battery cells can be in one-to-one correspondence only by connecting the fixing piece and the main body, the step of aligning the single connecting piece and the battery cells is omitted, and the installation efficiency of the battery module is improved; the fixing piece and the connecting piece of the battery module can be independently detached, so that only the connecting piece at the corresponding position of the battery cell needs to be detached when the battery cell is independently replaced, and the maintenance and replacement efficiency of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery module, an energy storage system, and an electrical device. Background Art

[0002] In the prior art, the core of electrical devices such as electric vehicles and portable charging piles lies in their energy system, that is, the energy storage system or battery module, which usually includes multiple battery modules. The battery module needs to have high energy density, stability and heat dissipation performance to meet the use requirements of the electrical devices.

[0003] For one thing, the existing battery module usually includes a plurality of single cells. Before forming the battery module, the plurality of single cells need to be assembled into a single cell by a battery core and a shell, and then the plurality of single cells and a battery box are assembled, thus resulting in low production efficiency of the battery module.

[0004] On the other hand, in the battery module, after the single battery is installed in the battery box, it is necessary to connect multiple battery top covers to the battery box one by one, so as to connect the single battery to the battery box one by one and seal the battery box. Therefore, the installation of the battery top cover and the battery box takes a long time, and it is easy to cause the battery top covers to be misaligned due to assembly errors, which in turn causes the batteries to be misaligned, affecting the stability of the battery module. If an integral top cover and battery box are connected, that is, multiple battery cells are connected to an integral top cover with multiple connection points, as long as one of the battery cells has a problem, the integral top cover needs to be completely dismantled, resulting in a significant increase in the cost of repairing the battery module and replacing the battery cells.

[0005] In summary, existing battery modules have low production efficiency, poor stability and high maintenance costs. Utility Model Content

[0006] The technical problem to be solved by the embodiments of the present application is the low production efficiency, poor stability and high maintenance cost of the existing battery modules.

[0007] In order to solve the above technical problems, the embodiment of the present application adopts the following solution:

[0008] A battery module, comprising:

[0009] A main body, wherein the main body is provided with a receiving cavity;

[0010] A plurality of battery cells, each of which comprises a tab, and the plurality of battery cells are distributed in the accommodating cavity at intervals;

[0011] A plurality of connectors, wherein the connectors and the battery cells are arranged in one-to-one correspondence, the connectors include a mounting portion and a connecting portion protruding from the mounting portion, and the tabs are connected to the connecting portions at relative positions thereof;

[0012] A fixing member is connected to the main body and seals the accommodating cavity. A plurality of connecting members are connected to the fixing member, and the connecting portion passes through the fixing member.

[0013] Furthermore, the battery module further comprises a fastener, the fastener is used to connect the main body and the fixing member, and the fastener comprises a pressing part and a fastening part connected to each other;

[0014] A first groove and a first through hole are provided on a side of the fixing member away from the accommodating cavity, the first through hole is located at the bottom of the first groove, the mounting portion is located in the first groove, and the connecting portion is passed through the first through hole;

[0015] Among them, the fastening portion is penetrated through the fixing member and the main body to connect the main body and the fixing member, the pressing portion is located on the side of the fixing member where the first groove is provided, and at least part of the pressing portion is located within the groove depth range of the first groove, which is used to limit the movement of the connecting member.

[0016] Furthermore, a surface of the connecting member away from the main body is a contact surface, and the contact surface contacts the pressing portion;

[0017] Wherein, the abutting surface is flush with the notch of the first groove; or,

[0018] The abutting surface extends beyond the notch of the first groove.

[0019] Furthermore, the first groove is interference fit with the mounting portion.

[0020] Further, a cross section parallel to the notch of the first groove is a cross section, and the cross section gradually increases along the direction from the notch to the groove bottom;

[0021] Wherein, the shape and size of the mounting portion are both compatible with the first groove.

[0022] Furthermore, the notch of the first groove is provided with a guiding arc surface, and the guiding arc surface connects the inner wall of the first groove and the side of the fixing member on which the first groove is provided.

[0023] Furthermore, the battery module further comprises a first sealing member, the main body is provided with a second groove, the second groove is located at the periphery of the accommodating cavity and encloses the accommodating cavity;

[0024] The first sealing component is located in the second groove and abuts against the fixing component and the groove bottom of the second groove.

[0025] Furthermore, the main body further comprises a plurality of separators, each of which is provided with a sub-accommodating cavity and a third groove surrounding the sub-accommodating cavity, the plurality of separators are distributed in the accommodating cavity at intervals, and the plurality of battery cells are located in the sub-accommodating cavity in a one-to-one correspondence;

[0026] The battery module further includes a plurality of second sealing members, wherein the second sealing members are disposed in the third groove, and the second sealing members abut against the connecting member and the bottom of the third groove.

[0027] Correspondingly, the present application also provides an energy storage system, which includes the battery module described in any one of the above embodiments.

[0028] Furthermore, the energy storage system includes a plurality of battery modules, and the plurality of battery modules are stacked;

[0029] The main body further comprises a plurality of partitions, wherein the partitions are provided with a plurality of sub-accommodation cavities, the plurality of partitions are distributed in the accommodation cavity at intervals, and the plurality of battery cells are located in the sub-accommodation cavities in a one-to-one correspondence;

[0030] Wherein, the partition and the inner wall of the accommodating cavity define a first gap and two oppositely arranged second gaps;

[0031] The second gap is located in the arrangement direction of the separators, the first gap is located in the stacking direction of the battery module, and the first gap is larger than the second gap.

[0032] Correspondingly, the present application also provides an electrical device, which includes the energy storage system described in any one of the above embodiments.

[0033] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0034] Since there are multiple connectors connected to the fixing part, when assembling the battery module, it is only necessary to connect the fixing part and the main body so that the connectors can correspond to the battery cell positions one by one, thereby omitting the step of aligning a single connector and a battery cell and improving the installation efficiency of the battery module; the fixing part and the connector of the battery module can be disassembled separately, so when replacing a battery cell separately, it is only necessary to disassemble the connector at the corresponding position of the battery cell, thereby improving the efficiency of battery cell maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a schematic diagram of the explosion of the battery module;

[0037] Figure 2 yes Figure 1 A magnified schematic diagram of the middle battery module;

[0038] Figure 3 This is another exploded diagram of the battery module;

[0039] Figure 4 yes Figure 3 An enlarged schematic diagram of the battery module at point C;

[0040] Figure 5 It is a structural diagram of a battery module;

[0041] Figure 6 yes Figure 5 An enlarged schematic diagram of the D portion of the middle battery module;

[0042] Figure 7 yes Figure 3 A schematic cross-sectional view of the fixing member after cutting along the XY plane;

[0043] Figure 8 yes Figure 3 A magnified schematic diagram of the battery module at point B;

[0044] Fig. 9 This is another exploded diagram of the battery module;

[0045] Fig.10 yes Fig. 9 Enlarged schematic diagram of point E of the middle battery module.

[0046] Reference numerals:

[0047] Battery module 10, main body 100, separator 110, sub-accommodating cavity 111, first gap 120, second gap 130, connector 200, positive electrode column 201, negative electrode column 202, injection hole 203, abutment surface 204, mounting portion 210, connecting portion 220, fixing member 300, first groove 310, first through hole 320, mounting hole 330, guide arc surface 340, fastener 400, pressing portion 410, battery cell 500, pole ear 510, first seal 600, second seal 700. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0049] In this application, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. In addition, in the description of this application, the term "including" means "including but not limited to". The terms first, second, third, etc. are used only as labels and do not impose numerical requirements or establish an order.

[0050] In this application, "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.

[0051] In the present application, "at least one" means one or more, and "plurality" means two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively.

[0052] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0053] Please refer to Figures 1 to 4The present embodiment provides a battery module 10, the battery module 10 comprising:

[0054] The main body 100 is provided with a receiving cavity (not marked in the figure);

[0055] A plurality of battery cells 500, each of which includes a tab 510, and the plurality of battery cells 500 are spaced apart and distributed in the receiving cavity;

[0056] A plurality of connectors 200, the connectors 200 and the battery cells 500 are arranged one by one, the connector 200 comprises a mounting portion 210 and a connecting portion 220 protruding from the mounting portion 210, and the tab 510 is connected to the connecting portion 220 at a relative position thereof;

[0057] The fixing member 300 is connected to the main body 100 and seals the accommodating cavity. The plurality of connecting members 200 are connected to the fixing member 300 , and the connecting portion 220 passes through the fixing member 300 .

[0058] In this embodiment, first, the fixing member 300 can gather a plurality of connecting members 200, and when the fixing member 300 is connected to the main body 100 and the accommodating cavity is sealed, each connecting member 200 corresponds to the battery cell 500 one by one, and the tab 510 of the battery cell 500 is connected to the connecting portion 220 at a relative position thereof;

[0059] Secondly, since there is a certain interval between the battery cells 500 and the tabs 510 of the battery cells 500 are connected to the connector 200, the battery cells 500 are fixed in position by means of the tabs 510 and the connector 200, and the structural stability is relatively high;

[0060] Then, in the battery module 10, the main body 100 serves as the outer shell of the battery cell 500 and protects the battery cell 500, and the connection between the main body 100 and the fixing member 300 and the connecting member 200 seals the accommodation cavity where the battery cell 500 is located to prevent water and oxygen from entering the battery cell 500;

[0061] Next, since a plurality of connectors 200 are provided on one fixing member 300, when assembling the battery module 10, it is not necessary to separately install the connectors 200 and the battery cells 500. Instead, the fixing member 300 and the main body 100 only need to be connected according to a preset position, so that the connectors 200 and the battery cells 500 can be automatically aligned one by one. Therefore, the battery module 10 of this embodiment omits the step of aligning a single connector 200 and a battery cell 500, thereby effectively improving the installation efficiency of the battery module 10.

[0062] Finally, compared with the connection method of the integral top cover in the prior art, the fixing member 300 and the connecting member 200 of the battery module 10 of this embodiment are not integrally formed, but can be disassembled separately. Therefore, when a battery cell 500 needs to be maintained or replaced separately, it can be removed as shown in the figure. Figure 3As shown, only the connector 200 at the corresponding position of the battery cell 500 needs to be removed, thereby improving the efficiency of maintaining and replacing the battery cell 500 of the battery module 10.

[0063] In summary, the battery module 10 of this embodiment has high production efficiency and reduces the maintenance and replacement costs of the battery module 10 while ensuring battery stability.

[0064] It can be understood that the connector 200 can be a top cover, the connecting portion 220 can be a pole, and the pole can include a positive pole 201 and / or a negative pole 202. When the connecting portion 220 includes a positive pole 201 and a negative pole 202, a single battery cell 500 has at least two tabs 510, and the two tabs 510 are respectively connected to the positive pole 201 and the negative pole 202. The connector 200 may also include a liquid injection hole 203, which can be used to inject liquid into the battery cell 500 and / or the accommodating cavity.

[0065] For further information, please refer to Figures 3 to 6 The battery module 10 further includes a fastener 400, which is used to connect the main body 100 and the fixing member 300, and the fastener 400 includes a pressing portion 410 and a fastening portion (not marked in the figure) connected to each other;

[0066] A first groove 310 and a first through hole 320 are provided on a side of the fixing member 300 away from the accommodating cavity. The first through hole 320 is located at the bottom of the first groove 310 . The mounting portion 210 is located in the first groove 310 . The connecting portion 220 is passed through the first through hole 320 .

[0067] The fastening portion is provided through the fixing member 300 and the main body 100 to connect the main body 100 and the fixing member 300, the pressing portion 410 is located on the side of the fixing member 300 provided with the first groove 310, and at least part of the pressing portion 410 is located at the groove depth of the first groove 310 (the groove depth direction is Figure 3 The range of the connecting member 200 is used to limit the movement of the connecting member 200.

[0068] In this embodiment, first, the fixing member 300 and the main body 100 need to be connected, and the fastener 400 can play the role of connecting the fixing member 300 and the main body 100;

[0069] Secondly, the fastener 400 realizes the connection between the main body 100 and the fixing member 300 by means of the fastening part penetrating the main body 100 and the fixing member 300. The groove depth range of the first groove 310 can be understood as the projection range of the groove opening of the first groove 310 along the groove depth direction. Since at least part of the pressing part 410 is located within the groove depth range, when the pressing part 410 is pressed on the side of the fixing member 300 provided with the first groove 310, the pressing part 410 can prevent the connector 200 located in the first groove 310 from falling out.

[0070] In summary, the present embodiment uses a simple fastener 400 to achieve the effect of simultaneously fixing the connecting member 200, the fastener 400 and the main body 100, avoiding the need for each connecting member 200 to be individually connected to the fixing member 300, which would reduce the assembly efficiency of the battery module 10, and also omits the required connection structure between the connecting member 200 and the fixing member 300, thereby effectively improving the production efficiency and battery energy density of the battery module 10, while reducing the production cost and space occupancy.

[0071] It should be understood that the fastener 400 includes a screw, in which the nut of the screw serves as the pressing portion 410, and the screw rod of the screw serves as the fastening portion, and the screw rod is at least threadedly connected to the main body 100, and may also be threadedly connected to the main body 100 and the fixing member 300. The fixing member 300 and the main body 100 may be provided with mounting holes 330 located opposite to each other, so that the fastening portion can be inserted and connected.

[0072] For further information, please refer to Figures 3 to 6 , a side of the connecting member 200 away from the main body 100 is abutting surface 204, and the abutting surface 204 abuts against the pressing portion 410;

[0073] The abutting surface 204 is flush with the notch of the first groove 310; or,

[0074] The abutting surface 204 extends beyond the notch of the first groove 310 .

[0075] In this embodiment, if the abutment surface 204 is lower than the notch, that is, the abutment surface 204 is located in the first groove 310, the pressing portion 410 on the side facing the abutment surface 204 cannot be pressed on the abutment surface 204, and the pressing portion 410 can only prevent the connecting member 200 from falling off the first groove 310.

[0076] However, since the abutting surface 204 of the present embodiment is flush with or exceeds the notch of the first groove 310, the pressing portion 410 can abut against the abutting surface 204, thereby providing a force from the connecting member 200 to the main body 100, so that the mounting portion 210 of the connecting member 200 is pressed against the bottom of the first groove 310, thereby preventing the connecting member 200 from moving along the groove. Figure 3 The battery module 10 can be shaken in the X direction, thereby improving the stability and structural strength of the battery module 10.

[0077] For further information, please refer to Figures 3 to 6 , the first groove 310 is interference fit with the mounting portion 210 .

[0078] In this embodiment, since the first groove 310 and the mounting portion 210 are interference fit, that is, the side wall of the mounting portion 210 will abut against the inner wall of the first groove 310, even if no other structure is provided to strengthen the stability of the connecting member 200 and the fixing member 300, the interference fit relationship between the connecting member 200 and the first groove 310 can also give it a certain structural strength and is not easy to slip out of the first groove 310.

[0079] For further information, please refer to Figure 3 , Figure 4 and Figure 7 , the cross section parallel to the notch of the first groove 310 is the cross section, and the cross section gradually increases from the notch to the groove bottom;

[0080] The shape and size of the mounting portion 210 are matched with the first groove 310 .

[0081] In this embodiment, since the cross section gradually increases from the groove opening to the groove bottom, the shape of the first groove 310 includes: Figure 7 Because the shape and size of the mounting portion 210 are compatible with the first groove 310, and the mounting portion 210 and the first groove 310 are interference fit, after the mounting portion 210 is assembled into the first groove 310, Figure 3 The inner wall of the first groove 310 exerts pressure in the middle X direction, thereby making the connection member 200 and the fixing member 300 more stable. It should be understood that the shape of the first groove 310 may also include various shapes such as a flask shape and an arc shape.

[0082] For further information, please refer to Figure 7 The notch of the first groove 310 is provided with a guide arc surface 340 , and the guide arc surface 340 connects the inner wall of the first groove 310 and the side of the fixing member 300 provided with the first groove 310 .

[0083] In this embodiment, since the cross section gradually increases from the notch to the bottom of the groove, and the shape of the mounting portion 210 matches the shape of the first groove 310, the area of ​​the end of the mounting portion 210 facing the first groove 310 is also large. Therefore, when the mounting portion 210 is inserted into the first groove 310, the installation force required for the interference fit is large, the installation efficiency is low, and it may even cause wear of the fixing member 300. In this embodiment, a guide arc surface 340 is provided, so when the mounting portion 210 enters the first groove 310, the friction coefficient can be reduced under the guiding effect of the guide arc surface 340, thereby improving the assembly efficiency of the connecting member 200 and the fixing member 300.

[0084] For further information, please refer to Figure 1 , Figures 8 to 10The battery module 10 further includes a first sealing member 600, and the main body 100 is provided with a second groove (not marked in the figure), the second groove is located at the periphery of the accommodating cavity and encloses the accommodating cavity;

[0085] The first sealing member 600 is located in the second groove and abuts against the fixing member 300 and the bottom of the second groove.

[0086] In the present embodiment, in order to ensure the sealing of the battery box to the single cell, the existing battery module usually uses welding and other methods to connect the top cover of the sealed single cell and the battery box. However, welding and other connection methods may cause welding slag to appear inside the battery box or outside the battery module 10, thereby reducing the stability of the battery. In addition, melt-through problems may occur during the welding process, leading to production safety problems.

[0087] The first sealing member 600 of the present embodiment is located in the second groove, and after the fixing member 300 is connected to the main body 100, it abuts against the bottom of the fixing member 300 and the second groove. Therefore, it can replace welding to achieve welding, thereby preventing substances such as water and oxygen from entering the battery box through the joint between the fixing member 300 and the main body 100, thereby avoiding production safety problems and improving the stability of the battery.

[0088] It should be understood that the first seal 600 can be an elastic member, so that when the fixing member 300 is pressed against the first seal 600, the first seal 600 can be deformed to fill the second groove, thereby avoiding a gap between the first seal 600 and the groove or the fixing member 300, thereby further improving the stability of the battery module 10 and the water-oxygen isolation effect.

[0089] For further information, please refer to Figures 8 to 10 The main body 100 further includes a plurality of separators 110, each separator 110 is provided with a sub-accommodating cavity 111 and a third groove (not marked in the figure) surrounding the sub-accommodating cavity 111, the plurality of separators 110 are distributed in the accommodating cavity at intervals, and the plurality of battery cells 500 are located in the sub-accommodating cavity 111 in a one-to-one correspondence;

[0090] The battery module 10 further includes a plurality of second sealing members 700 . The second sealing members 700 are disposed in the third grooves, and the second sealing members 700 abut against the connecting member 200 and the bottom of the third grooves.

[0091] In this embodiment, the separator 110 can further separate the battery cells 500, thereby preventing the battery cells 500 from contacting each other after the battery module 10 is shaken or bumped, thereby improving the stability of the battery. When the fixing member 300 is connected to the main body 100, the second sealing member 700 seals the single sub-accommodating cavity 111, thereby improving the stability of a single battery cell 500 in the battery module 10, and similarly, it can also reduce production safety issues.

[0092] Correspondingly, the present application also provides an energy storage system, which includes the battery module 10 of any one of the above embodiments.

[0093] In this embodiment, since the energy storage system includes the battery module 10 of any one of the above embodiments, when assembling the energy storage system, it is not necessary to install the connector 200 and the battery cell 500 separately one by one, which effectively improves the installation efficiency of the electrical device; at the same time, when it is necessary to maintain or replace a certain battery cell 500 separately, it is only necessary to remove the connector 200 at the corresponding position of the battery cell 500, thereby improving the maintenance and replacement efficiency of the battery cell 500 of the energy storage system.

[0094] Furthermore, the energy storage system includes a plurality of battery modules 10, and the plurality of battery modules 10 are stacked;

[0095] The main body 100 further includes a plurality of partitions 110, the partitions 110 are provided with a plurality of sub-accommodation cavities 111, the plurality of partitions 110 are distributed in the accommodation cavity at intervals, and the plurality of battery cells 500 are located in the sub-accommodation cavities 111 in a one-to-one correspondence;

[0096] The partition 110 and the inner wall of the accommodating cavity define a first gap 120 and two oppositely disposed second gaps 130;

[0097] The second gap 130 is located in the arrangement direction of the separators 110 , and the first gap 120 is located in the stacking direction of the battery module 10 . The first gap 120 is larger than the second gap 130 .

[0098] In this embodiment, the first gap 120 and the second gap 130 can be used to allow the main body 100 to deform slightly to avoid direct breakage when the main body 100 is subjected to excessive force. Figure 3 The pressure in the Z direction is greater, and Figure 3 The pressure in the Y direction is smaller. If the first gap 120 and the second gap 130 are the same size, then under the premise that the first gap 120 meets the deformation requirements of the main body 100, the second gap 130 will lead to low space utilization and low energy density of the energy storage system. Therefore, in this embodiment, the first gap 120 is designed to be larger than the second gap 130, so that the battery module 10 in the energy storage system can reduce the space occupancy in the Y direction while the main body 100 fully deforms in the Z and Y directions, thereby improving the energy density of the energy storage system.

[0099] Correspondingly, the present application also provides an electrical device, which includes the energy storage system of any one of the above embodiments.

[0100] In this embodiment, because the electrical device includes the energy storage system of any one of the above embodiments, when assembling the electrical device, there is no need to install the connector 200 and the battery cell 500 separately one by one, which effectively improves the installation efficiency of the electrical device; at the same time, when a certain battery cell 500 needs to be maintained or replaced separately, it is only necessary to remove the connector 200 at the corresponding position of the battery cell 500, thereby improving the maintenance and replacement efficiency of the battery cell 500 of the electrical device.

[0101] It is understandable that electrical devices include but are not limited to electric vehicles, charging piles, solar power generation equipment, wind power generation equipment, emergency lighting devices, etc.

[0102] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A battery module (10), characterized in that: The battery module (10) comprises: A main body (100), wherein the main body (100) is provided with a receiving cavity; A plurality of battery cells (500), each of the battery cells (500) comprising a tab (510), and the plurality of battery cells (500) are distributed in the accommodation cavity at intervals; A plurality of connectors (200), wherein the connectors (200) and the battery cells (500) are arranged in a one-to-one correspondence, the connectors (200) comprising a mounting portion (210) and a connecting portion (220) protruding from the mounting portion (210), and the tabs (510) are connected to the connecting portion (220) at a relative position thereof; A fixing member (300) is connected to the main body (100) and seals the accommodating cavity; a plurality of connecting members (200) are connected to the fixing member (300); and the connecting portion (220) passes through the fixing member (300).

2. The battery module (10) according to claim 1, characterized in that: The battery module (10) further comprises a fastener (400), the fastener (400) being used to connect the main body (100) and the fixing member (300), the fastener (400) comprising a pressing portion (410) and a fastening portion connected to each other; A first groove (310) and a first through hole (320) are provided on a side of the fixing member (300) away from the accommodating cavity, the first through hole (320) is located at the bottom of the first groove (310), the mounting portion (210) is located in the first groove (310), and the connecting portion (220) is passed through the first through hole (320); The fastening portion is provided through the fixing member (300) and the main body (100), the pressing portion (410) is located on a side of the fixing member (300) where the first groove (310) is provided, and at least a portion of the pressing portion (410) is located within the groove depth range of the first groove (310), so as to limit the movement of the connecting member (200).

3. The battery module (10) according to claim 2, characterized in that: A surface of the connecting member (200) away from the main body (100) is a contact surface (204), and the contact surface (204) contacts the pressing portion (410); Wherein, the abutment surface (204) is flush with the notch of the first groove (310); or, The abutment surface (204) extends beyond the notch of the first groove (310).

4. The battery module (10) according to claim 2, characterized in that: The first groove (310) is interference-fitted with the mounting portion (210).

5. The battery module (10) according to claim 4, characterized in that: A cross section parallel to the notch of the first groove (310) is a cross section, and the cross section gradually increases in a direction from the notch to the groove bottom; Wherein, the shape and size of the mounting portion (210) are compatible with the first groove (310).

6. The battery module (10) according to claim 5, characterized in that: The notch of the first groove (310) is provided with a guide arc surface (340), and the guide arc surface (340) connects the inner wall of the first groove (310) and a surface of the fixing member (300) provided with the first groove (310).

7. The battery module (10) according to claim 1, characterized in that: The battery module (10) further comprises a first sealing member (600), the main body (100) is provided with a second groove, the second groove is located at the periphery of the accommodating cavity and surrounds the accommodating cavity; The first sealing member (600) is located in the second groove and abuts against the fixing member (300) and the bottom of the second groove.

8. The battery module (10) according to claim 1, characterized in that: The main body (100) further comprises a plurality of separators (110), each of the separators (110) being provided with a sub-accommodating cavity (111) and a third groove surrounding the sub-accommodating cavity (111), the plurality of separators (110) being distributed in the accommodating cavity at intervals, and the plurality of battery cells (500) being located in the sub-accommodating cavity (111) in a one-to-one correspondence; The battery module (10) further comprises a plurality of second sealing members (700), wherein the second sealing members (700) are arranged in the third groove, and the second sealing members (700) abut against the connecting member (200) and the bottom of the third groove.

9. An energy storage system, characterized in that: The energy storage system comprises the battery module (10) according to any one of claims 1 to 8.

10. The energy storage system according to claim 9, characterized in that: The energy storage system comprises a plurality of battery modules (10), and the plurality of battery modules (10) are stacked; The main body (100) further comprises a plurality of separators (110), the separators (110) being provided with a plurality of sub-accommodation cavities (111), the plurality of separators (110) being distributed in the accommodation cavity at intervals, and the plurality of battery cells (500) being located in the sub-accommodation cavities (111) in a one-to-one correspondence; The partition (110) and the inner wall of the accommodating cavity define a first gap (120) and two oppositely arranged second gaps (130); The second gap (130) is located in the arrangement direction of the separator (110), the first gap (120) is located in the stacking direction of the battery module (10), and the first gap (120) is larger than the second gap (130).

11. An electrical device, characterized in that: The electrical device comprises the energy storage system according to any one of claims 9 to 10.

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