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 battery pack, the battery pack comprises a plurality of batteries, a first pole and a second pole are arranged on the two opposite sides of each battery respectively, the direction from the first pole to the second pole is the first direction, the batteries are arranged and distributed in the first direction, and a mounting gap is formed between every two adjacent batteries; and at least part of the first connecting piece is located in the mounting gap, one end of the first connecting piece is connected to the first pole of one battery, and the other end of the first connecting piece is connected to the second pole of the other battery. As the battery is provided with the first pole and the second pole which are opposite to each other along the first direction, the battery can be arranged along the first direction, and the battery module or the battery pack in the battery module can be stacked along the direction vertical to the first direction, the distribution optionality of the batteries in the battery module is more, and the battery efficiency is improved. And the first connecting piece can be prevented from being collided and damaged by the upper-layer battery module or the battery pack when the battery packs are stacked.

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] The core of electrical devices like electric vehicles and portable charging stations lies in their energy systems, namely, battery modules. Battery modules must simultaneously possess high energy density, stability, and heat dissipation performance to meet the demands of these devices. Therefore, battery modules typically include multiple single cells to maximize their energy density.

[0003] In the prior art, battery modules generally use connectors to connect adjacent single cells in series and / or in parallel, thereby increasing the total capacity and / or voltage of the battery module and making the battery module adapt to the energy requirements of electrical devices.

[0004] However, in conventional battery modules, the battery poles are located on the same side of the battery, resulting in the battery modules being arranged only on one side, along the direction of the pole protrusion. Connectors can also only be located on the side of the battery with the poles. When multiple battery modules are stacked along the protruding pole direction to form an energy storage system, the bottom of the upper battery module must be considered to prevent the connectors from being squeezed or bumped by the current battery module. Therefore, additional structures are often required to create a certain gap between the upper and current battery modules. This results in low energy density, complex structure, and high production costs for the battery modules and energy storage systems. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the present application is the problem that existing battery modules have limited layout, low energy density and high production cost.

[0006] In order to solve the above technical problems, an embodiment of the present application provides a battery module, wherein the battery module comprises:

[0007] A battery pack, the battery pack comprising a plurality of batteries, wherein a first pole and a second pole are respectively provided on opposite sides of the battery, the direction from the first pole to the second pole being a first direction, the plurality of batteries being arranged and distributed along the first direction, with installation gaps formed between adjacent batteries;

[0008] A first connector, at least a portion of which is located in the installation gap, and one end of which is connected to the first pole of one of the batteries, and the other end of which is connected to the second pole of the other battery.

[0009] Furthermore, the battery module also includes a second connecting member, the battery pack has multiple, and the multiple battery packs are arranged in sequence. The second connecting member is located on both sides of the battery pack and connects the first pole or the second pole of the adjacent battery packs on the same side.

[0010] Furthermore, the first connecting member includes two connecting portions and a bending portion, the two connecting portions are connected to the same side of the bending portion, and a deformation gap is defined between the two connecting portions, and the two connecting portions are respectively connected to the first pole and the second pole in the same installation gap.

[0011] Furthermore, the battery module also includes a plurality of liquid cooling plates arranged in sequence along a direction perpendicular to the first direction. The battery pack has multiple groups, and the battery packs are arranged on both sides of the liquid cooling plates. A cooling gap is formed between adjacent liquid cooling plates, and two groups of battery packs are arranged in the cooling gap.

[0012] Furthermore, along the arrangement direction of the liquid cooling plates, the bent portions of two adjacent first connectors in the same installation gap abut against each other, and the bent portions are elastic members.

[0013] Furthermore, at least one set of positioning components is provided in the two bending parts abutting each other, and the positioning components include positioning protrusions and positioning grooves that cooperate with each other, and the positioning protrusions and the positioning grooves are respectively arranged on the abutting surfaces of the two bending parts abutting each other.

[0014] Furthermore, both ends of the bending portion are bent to form a first sub-bending portion and a second sub-bending portion, an adjustable gap is provided between the first sub-bending portion and the second sub-bending portion, and in the same first connecting member, the connecting portions are respectively provided on the first sub-bending portion and the second sub-bending portion;

[0015] The battery module is further provided with an adjustment component, which is used to drive the first sub-bending portion and the second sub-bending portion to move relative to or apart from each other to adjust the size of the adjustment gap.

[0016] Furthermore, the adjustment assembly includes a first adjustment member and a second adjustment member, the second adjustment member is sleeved on the first adjustment member; the first adjustment member includes a penetration portion and an abutment portion connected to each other, the abutment portion abuts against a side of the second sub-bend portion away from the first sub-bend portion, and the second adjustment member abuts against a side of the first sub-bend portion away from the second sub-bend portion;

[0017] Wherein, the penetration portion penetrates the bending portion and the second adjusting member, and is at least threadedly connected to the second adjusting member.

[0018] Correspondingly, the present application also provides an energy storage system, which includes multiple battery modules described in any one of the above embodiments.

[0019] Correspondingly, the present application also provides an electrical device, which includes the energy storage system described in the above embodiment.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] The battery of the present application has a first pole and a second pole opposite to each other along a first direction. The batteries can be arranged along the first direction, and the battery module or the battery pack in the battery module can be stacked in a direction perpendicular to the first direction. Therefore, the distribution of the batteries inside the battery module of this embodiment has many options and can prevent the first connecting member from being damaged by the upper battery module or battery pack when the battery packs are stacked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction will be 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 any creative work.

[0023] Figure 1 1 is a schematic structural diagram of a battery module according to an embodiment of the present application;

[0024] Figure 2 yes Figure 1 A schematic diagram of the connection structure between the middle battery pack and the first connecting member;

[0025] Figure 3 yes Figure 2 A schematic diagram of another connection structure between the battery pack and the first connector;

[0026] Figure 4 yes Figure 1 Another structural diagram of the battery module;

[0027] Figure 5 yes Figure 4 A magnified schematic diagram of point A in the middle;

[0028] Figure 6 is a schematic structural diagram of two first connecting members in an embodiment of the present application;

[0029] Figure 7 It is a structural schematic diagram of another first connecting member of an embodiment of the present application.

[0030] Reference numerals:

[0031] Battery module 10, installation gap 20, battery 100, first pole 110, second pole 120, first connector 200, connecting portion 210, bending portion 220, first sub-bending portion 221, second sub-bending portion 222, positioning protrusion 223, positioning groove 224, second connector 300, liquid cooling plate 400, bottom plate 500, adjustment assembly 600, first adjustment member 610, penetration portion 611, abutment portion 612, second adjustment member 620. DETAILED DESCRIPTION

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] Please refer to Figures 1 to 3 , Figure 1 The X direction is a first direction. The embodiment of the present application provides a battery module 10, which includes:

[0035] A battery pack includes a plurality of batteries 100, with a first pole 110 and a second pole 120 respectively provided on opposite sides of the battery 100. The direction from the first pole 110 to the second pole 120 is a first direction. The plurality of batteries 100 are arranged and distributed along the first direction, and an installation gap 20 is formed between adjacent batteries 100;

[0036] The first connector 200 , at least a portion of which is located in the installation gap 20 , has one end connected to the first pole 110 of one of the batteries 100 and the other end connected to the second pole 120 of the other battery 100 .

[0037] In this embodiment, please refer to Figure 1The battery 100 has a first terminal 110 and a second terminal 120 arranged opposite to each other along the X direction. Therefore, the battery 100 can be arranged along the X direction. Therefore, the distribution of the battery 100 inside the battery module 10 of this embodiment is not limited to a single-side arrangement, and there are many options. At the same time, because the first connecting member 200 is located in the installation gap 20, even if the battery pack or the battery pack in the battery module 10 is arranged in a direction perpendicular to the first direction ( Figure 1 The stacking arrangement (in the Z-axis direction) can also prevent the first connector 200 from being damaged by the upper battery module 10 or the battery pack when the battery packs are stacked. In summary, firstly, the arrangement of the batteries 100 within the battery module 10 of this embodiment is highly plannable, with more battery 100 distribution options, thereby adapting to energy storage systems with different space requirements. Secondly, when the battery packs in the battery module 10 of this embodiment are stacked along the Z-axis direction, no additional structure is required to separate two adjacent layers of battery packs. Therefore, the battery module 10 has a high energy density and low production cost.

[0038] It should be understood that the first connector 200 is used to electrically connect adjacent batteries 100 and includes components such as busbars and wires. The connection between the first connector 200 and the first and second electrodes 110, 120 includes welding, overlapping, interference fit, and other methods. The first connector 200 can be completely located within the installation gap 20 shown, thereby preventing damage to two adjacent first connectors 200 along the Y direction when the battery packs are stacked along the Y direction. It can also prevent the remaining structures of the battery module 10 from colliding with the first connector 200 during production. The first electrode 110 can be an anode or a cathode, and the polarity of the second electrode 120 can be opposite to or the same as that of the first electrode 110.

[0039] For further information, please refer to Figure 1 and Figure 4 The battery module 10 further includes a second connector 300. The battery pack has multiple battery packs, and the multiple battery packs are arranged in sequence. The second connector 300 is located on both sides of the battery pack and connects the first pole 110 or the second pole 120 of the adjacent battery packs on the same side.

[0040] In this embodiment, since the first pole 110 and the second pole 120 are respectively provided at both ends of the first direction of the battery 100, the first pole 110 or the second pole 120 on the leftmost and rightmost sides of the battery pack are not within the installation gap 20 and cannot be connected through the first connector 200. In this embodiment, the second connector 300 is provided to electrically connect the multiple battery packs on the leftmost side of the battery module 10 and / or connect the multiple battery packs on the rightmost side, thereby realizing series connection and / or parallel connection between the multiple battery packs, thereby further improving the capacity of the battery module 10. It is understandable that the direction in which the battery packs are arranged in sequence can be Figure 1 Any straight line in the YZ plane can also be the Y axis or the Z axis.

[0041] For further information, please refer to Figure 2 and Figure 3 The first connecting member 200 includes two connecting portions 210 and a bending portion 220. The two connecting portions 210 are connected to the same side of the bending portion 220, and a deformation gap is defined between the two connecting portions 210. The two connecting portions 210 are respectively connected to the first pole 110 and the second pole 120 in the same installation gap 20.

[0042] During the installation process of the battery module 10, it is usually necessary to arrange the batteries 100 according to the preset position first, and then use the first connecting member 200 to insert it into the installation gap 20. Therefore, if the arrangement position of the batteries 100 does not match the preset position, the first connecting member 200 will not be able to be inserted into the installation gap 20 due to assembly errors. It is necessary to manually adjust the spacing between the batteries 100 or replace the first connecting member 200, which affects the production efficiency of the battery module 10.

[0043] In this embodiment, because the two connecting portions 210 are located on the same side of the bent portion 220 and a deformable gap is formed between the two connecting portions 210, the connecting portions 210 can slightly deform to accommodate installation gaps 20 of varying sizes, thereby eliminating assembly errors caused by the spacing between adjacent batteries 100 not meeting a preset value, thereby improving the production efficiency of the battery module 10. It is understood that the first connecting member 200 can have a U-shaped, concave-shaped, or other structure.

[0044] For further information, please refer to Figure 1 、 Figure 4 and Figure 5 The battery module 10 also includes a plurality of liquid cooling plates 400 arranged in sequence along a direction perpendicular to the first direction. The battery packs include multiple groups, and battery packs are arranged on both sides of the liquid cooling plates 400. A cooling gap is formed between adjacent liquid cooling plates 400, and two groups of battery packs are arranged in the cooling gap.

[0045] In this embodiment, in order to further improve the energy density of the battery module 10, the battery pack of this embodiment can also be connected along the Figure 1 The battery modules 10 are stacked and distributed sequentially in the Y direction. In this case, the cooling gap formed by adjacent liquid cooling plates 400 in the battery module 10 can clamp at least two groups of battery modules 10 and ensure that each group of battery modules is cooled by the liquid cooling plates 400. In summary, the battery module 10 of this embodiment can achieve heat dissipation while not requiring additional structure. Multiple battery groups are secured solely by the liquid cooling plates 400, thereby reducing the production cost of the battery module 10.

[0046] It should be understood that the battery module 10 may further include a base plate 500 , and the liquid cooling plates 400 are perpendicular to the base plate 500 , and the base plate 500 is used to support the battery pack.

[0047] For further information, please refer to Figure 1 、 Figure 4 and Figure 5 Along the arrangement direction of the liquid cooling plates 400 , the bending portions 220 of two adjacent first connectors 200 in the same installation gap 20 abut against each other, and the bending portions 220 are elastic members.

[0048] In this embodiment, since the bent portions 220 of the first connecting member 200 abut against each other, there is a certain gap between adjacent batteries 100, which can prevent the side surfaces of adjacent batteries 100 in the installation gap 20 from heating up and swelling and contacting each other, thereby effectively improving the service life of the battery module 10; at the same time, since the bent portions 220 are elastic parts, when the two bent portions 220 just come into contact, both bent portions 220 can be elastically deformed to prevent the first pole 110 and the second pole 120 of the battery 100 from being broken under rigid stress, thereby effectively improving the assembly efficiency of the battery module 10.

[0049] For further information, please refer to Figure 1 、 Figure 4 and Figure 5 and Figure 6 At least one set of positioning components is provided in the two bending parts 220 abutting each other, and the positioning components include positioning protrusions 223 and positioning grooves 224 that cooperate with each other. The positioning protrusions 223 and the positioning grooves 224 are respectively arranged on the abutting surfaces of the two bending parts 220 abutting each other.

[0050] In this embodiment, please refer to Figure 6 The two bent portions 220 are each provided with a set of positioning components, and the two abut against each other. At this time, the positioning groove 224 and positioning protrusion 223 of one bent portion 220 are respectively interlocked with the positioning protrusion 223 and positioning groove 224 of the other bent portion 220. Both battery groups are restricted in the first direction by the positioning protrusion 223 and positioning groove 224, thereby effectively preventing the two adjacent battery groups from moving relative to each other in the first direction, effectively improving the stability of the battery module 10. At the same time, when aligning two adjacent battery groups, only one pair of the abutting bent portions 220 of the adjacent battery groups needs to be interlocked, and the remaining bent portions 220 will also automatically interlock, effectively improving the assembly efficiency of the battery module 10.

[0051] It can be understood that in a group of positioning components, the positioning protrusion 223 and the positioning groove 224 can be respectively located on two bending parts 220 that abut each other. At this time, one of the bending parts 220 is provided with a positioning protrusion 223, and the other bending part 220 is provided with a positioning groove 224, and the positioning protrusion 223 and the positioning groove 224 are embedded with each other.

[0052] For further information, please refer to Figure 3 and Figure 7 The two ends of the bending portion 220 are bent to form a first sub-bending portion 221 and a second sub-bending portion 222. There is an adjustable gap between the first sub-bending portion 221 and the second sub-bending portion 222. In the same first connecting member 200, the connecting portion 210 is respectively provided at the first sub-bending portion 221 and the second sub-bending portion 222.

[0053] The battery module 10 is further provided with an adjustment component 600 , which is used to drive the first sub-bending portion 221 and the second sub-bending portion 222 to move relative to or apart from each other, so as to adjust the size of the adjustment gap.

[0054] In this embodiment, the adjustment assembly 600 drives the first sub-bend portion 221 and the second sub-bend portion 222, thereby driving the two connecting portions 210 to move closer to or further apart from each other. Therefore, the first connector 200 can adjust the distance between the two connecting portions 210 at any time, thereby allowing the first connector 200 to connect the first and second terminals 110 and 120 in installation gaps 20 of different sizes, thereby improving the assembly efficiency of the battery module 10. It is understood that the adjustment assembly 600 includes structures such as clips and movable clamps.

[0055] For further information, please refer to Figure 3 and Figure 7 The adjustment assembly 600 includes a first adjustment member 610 and a second adjustment member 620 , wherein the second adjustment member 620 is sleeved on the first adjustment member 610 ;

[0056] The first adjusting member 610 includes a penetrating portion 611 and an abutting portion 612 connected to each other. The abutting portion 612 abuts against a side of the second sub-bending portion 222 away from the first sub-bending portion 221 . The second adjusting member 620 abuts against a side of the first sub-bending portion 221 away from the second sub-bending portion 222 .

[0057] The penetration portion 611 penetrates the bending portion 220 and the second adjusting member 620 and is at least threadedly connected to the second adjusting member 620 .

[0058] In this embodiment, because the abutting portion 612 and the second adjusting member 620 abut against the first sub-bend portion 221 and the second sub-bend portion 222, respectively, when the penetration portion 611 is threadedly connected to the second adjusting member 620 and the penetration portion 611 rotates, the distance between the second adjusting member 620 and the abutting portion increases or decreases with the thread, thereby driving the first sub-bend portion 221 and the second sub-bend portion 222 to move closer to or further away from each other, thereby achieving control of the gap formed between adjacent connecting portions 210. Compared to using structures such as clips and movable clamps to drive the first sub-bend portion 221 and the second sub-bend portion 222 to move closer to or further away from each other, the adjusting assembly 600 of this embodiment has a simple structure and is easy to operate, which can effectively reduce the production cost of the battery module 10.

[0059] It can be understood that when the penetration portion 611 and the first sub-bending portion 221 and the second sub-bending portion 222 are threadedly connected, the connection stability between the adjustment component 600 and the bending portion 220 is higher.

[0060] Accordingly, the present application also provides an energy storage system, which includes a plurality of battery modules 10 according to any one of the above embodiments.

[0061] In this embodiment, because the energy storage system includes multiple battery modules 10 according to any of the above embodiments, the arrangement of the energy storage system is highly plannable, with more battery module 10 distribution schemes, thereby adapting to energy storage systems with different space requirements. Secondly, when the battery modules 10 in the energy storage system of this embodiment are stacked along the Z-axis direction, there is no need to add additional structures to separate two adjacent layers of battery modules 10, so the energy storage device has a high energy density and low production cost.

[0062] Correspondingly, the present application also provides an electrical device, which includes the energy storage system in the above embodiment.

[0063] In this embodiment, because the electrical device includes the energy storage system described in the above embodiment, the electrical device has high energy density and low production cost. It is understood that the electrical device includes but is not limited to electric vehicles, charging stations, solar power generation equipment, wind power generation equipment, emergency lighting devices, etc.

[0064] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0065] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the 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 has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

[0066] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, combinations, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module (10), characterized in that: The battery module (10) comprises: A battery pack, comprising a plurality of batteries (100), wherein a first pole (110) and a second pole (120) are respectively provided on opposite sides of the battery (100), wherein a direction from the first pole (110) to the second pole (120) is a first direction, and the plurality of batteries (100) are arranged and distributed along the first direction, and an installation gap (20) is formed between adjacent batteries (100); A first connector (200), at least a portion of which is located within the installation gap (20), and one end of which is connected to the first pole (110) of one of the batteries (100), and the other end of which is connected to the second pole (120) of the other battery (100).

2. The battery module (10) according to claim 1, characterized in that: The battery module (10) further includes a second connecting member (300), the battery pack has a plurality of battery packs, the plurality of battery packs are arranged in sequence, and the second connecting member (300) is located on both sides of the battery pack and connects adjacent battery packs on the same side.

3. The battery module (10) according to claim 1, characterized in that: The first connecting member (200) comprises two connecting portions (210) and a bending portion (220), wherein the two connecting portions (210) are connected to the same side of the bending portion (220), and a deformation gap is defined between the two connecting portions (210), and the two connecting portions (210) are respectively connected to the first pole (110) and the second pole (120) within the same installation gap (20).

4. The battery module (10) according to claim 3, characterized in that: The battery module (10) further comprises a plurality of liquid cooling plates (400) sequentially arranged in a direction perpendicular to the first direction, the battery packs comprising a plurality of groups, the battery packs being arranged on both sides of the liquid cooling plates (400), a cooling gap being formed between adjacent liquid cooling plates (400), and two groups of the battery packs being arranged in the cooling gap.

5. The battery module (10) according to claim 4, characterized in that: Along the arrangement direction of the liquid cooling plates (400), the bent portions (220) of two adjacent first connecting members (200) in the same installation gap (20) abut against each other, and the bent portions (220) are elastic members.

6. The battery module (10) according to claim 5, characterized in that: At least one set of positioning components is provided in the two mutually abutting bent portions (220), and the positioning components include mutually cooperating positioning protrusions (223) and positioning grooves (224), and the positioning protrusions (223) and the positioning grooves (224) are respectively provided on the abutting surfaces of the two mutually abutting bent portions (220).

7. The battery module (10) according to claim 3, characterized in that: The two ends of the bending portion (220) are bent to form a first sub-bending portion (221) and a second sub-bending portion (222); an adjustable gap is provided between the first sub-bending portion (221) and the second sub-bending portion (222); in the same first connecting member (200), the connecting portion (210) is respectively provided on the first sub-bending portion (221) and the second sub-bending portion (222); The battery module (10) is further provided with an adjustment component (600), and the adjustment component (600) is used to drive the first sub-bending portion (221) and the second sub-bending portion (222) to move relative to or apart from each other, so as to adjust the size of the adjustment gap.

8. The battery module (10) according to claim 7, characterized in that: The adjusting assembly (600) comprises a first adjusting member (610) and a second adjusting member (620), wherein the second adjusting member (620) is sleeved on the first adjusting member (610); the first adjusting member (610) comprises a penetrating portion (611) and an abutting portion (612) connected to each other, wherein the abutting portion (612) abuts against a side of the second sub-bending portion (222) away from the first sub-bending portion (221), and the second adjusting member (620) abuts against a side of the first sub-bending portion (221) away from the second sub-bending portion (222); The penetration portion (611) is penetrated by the bending portion (220) and the second adjusting member (620), and is at least threadedly connected to the second adjusting member (620).

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

10. An electrical device, characterized in that: The electrical device includes the energy storage system described in claim 9 above.

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