Output electrode base of battery module and battery module

Abstract

The utility model discloses an output pole base of a battery module and the battery module, the battery module comprises a battery cell group and an end plate, the peripheries of the battery cell group and the end plate are sleeved with a locking belt, and the battery cell group is provided with an output pole piece; the output electrode base comprises a base body, a rear isolation plate and a side isolation plate are arranged on the base body, a clamping plate is arranged on the periphery of the side isolation plate, the rear isolation plate, the side isolation plate and the clamping plate are integrally formed with the base body, and the clamping plate abuts against the end plate and the battery cell set for limiting; a mounting groove is formed in the end plate, the base body is clamped with the mounting groove in a limiting mode, a positioning column is arranged in the mounting groove, a positioning hole is formed in the lower end face of the base body, and the positioning column is fixed with the positioning hole in an inserted mode. According to the utility model, an integrated structure is adopted, so that the assembly difficulty is reduced; and meanwhile, the base body is matched with the end plate in an inserted mode, the installation stability of the output pole base on the end plate can be improved, the clamping plate abuts against the end plate and the battery cell set for limiting, and the installation stability of the output pole base is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery modules, in particular to an output pole base of a battery module and a battery module. Background Art

[0002] In the energy storage battery module, the output pole base is installed on the end plate and is used to fix the output pole aluminum sheet. The output pole base is made of insulating material and has both insulating and fixing functions. The insulation function is determined by the characteristics of the material itself, and the structure must meet the electrical safety clearance and fix the output pole aluminum sheet. The output pole base of the existing technology needs to meet the electrical clearance requirements of relevant specifications when the system voltage is thousands of volts or higher. If the output pole base does not have an insulating function, the output pole aluminum sheet will be very close to the metal end plate or there is a risk of contact with the end plate, resulting in leakage and causing safety accidents. The existing output pole base also has the following problems:

[0003] 1. The existing output pole bases are basically simply surrounded by fences. When the safety electrical clearance is insufficient, insulating sheets will be added around the output pole base, which makes the solution more complicated, increases the number of production processes, and reduces production efficiency.

[0004] 2. In existing battery modules, a mounting slot is usually preset on the end plate, and then the output pole base is interference fit in the preset mounting slot. The output pole base is fixed by the interference fit with the end plate. There is a lack of a stable fixed clamping structure, which is prone to loosening over time, affecting the fixing effect of the output pole aluminum sheet. Utility Model Content

[0005] In order to solve some or all of the problems existing in the above-mentioned prior art, on the one hand, the utility model provides an output pole base of a battery module, the battery module includes a battery cell group composed of a plurality of battery cells connected in series, end plates are respectively provided at both ends of the battery cell group, the outer periphery of the battery cell group and the end plate are sleeved with locking belts, the battery cell group is provided with an output pole piece, and the end plate is provided with an output pole base for fixing the output pole piece, characterized in that: the output pole base includes a base body, the base body is made of insulating material, the rear end of the base body is provided with a rear isolation plate, and the two sides of the base body are respectively provided with side isolation plates. The side isolation plate and the rear isolation plate respectively protrude from the upper end surface of the base body, and a snap-in plate is provided on the periphery of one end of the side isolation plate away from the base body. The rear isolation plate, the side isolation plate and the snap-in plate are respectively integrally formed with the base body, and the snap-in plate is inserted between the battery cell group and the end plate, and is respectively abutted against the end plate and the battery cell group for limiting position; the upper end surface of the end plate is provided with a mounting groove adapted to the base body, and the base body is limitedly snapped with the mounting groove, a positioning column is provided in the mounting groove, and a positioning hole is provided on the lower end surface of the base body, and the positioning column is plugged and fixed with the positioning hole.

[0006] As a further improvement of the present invention, an avoidance groove is provided on the rear end surface of the end plate, the clamping plate is inserted into the avoidance groove, and the rear end surface of the clamping plate is flush with the rear end surface of the end plate.

[0007] As a further improvement of the present invention, a mounting plane is provided on the base body, a limiting nut for fixing the output pole piece is provided on the mounting plane, and the limiting nut is threadedly connected to the fixing hole.

[0008] As a further improvement of the present invention, a threaded hole is provided on the installation plane at a position corresponding to the limiting nut, and the limiting nut is threadedly connected to the threaded hole.

[0009] As a further improvement of the present invention, there are two threaded holes and two limiting nuts, and the two are arranged in a one-to-one correspondence.

[0010] As a further improvement of the present invention, a slot or a cross slot is provided on the upper end surface of the limit nut.

[0011] As a further improvement of the present invention, there are four positioning posts and four positioning holes, respectively, and the two are arranged in a one-to-one correspondence.

[0012] On the other hand, the utility model also provides a battery module including the above-mentioned output pole base, and also includes a battery cell group consisting of multiple battery cells connected in series, and end plates are respectively provided at both ends of the battery cell group, the output pole base is connected to the end plate, the clamping plate is clamped between the end plate and the battery cell group, and a locking band is sleeved on the end plate, and the locking band can lock the end plate, the battery cell group and the base body.

[0013] As a further improvement of the present invention, there are two locking belts.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model forms the rear isolation plate and the side isolation plate into one piece with the base body. The integrated structure can simplify the mechanical structure of the output pole base, thereby reducing assembly difficulty and improving production efficiency.

[0016] 2. In the present invention, positioning holes are provided on the base body, and are plugged into the positioning posts on the end plate, thereby improving the convenience of installation; at the same time, the plug-in fit can also improve the installation stability of the output pole base on the end plate; on the other hand, by providing a clamping plate, the base body is abutted and limited with the end plate and the battery cell group, thereby improving the installation stability of the output pole base. During assembly, the positioning holes are first aligned and plugged into the positioning posts, thereby installing the base body on the end plate until the base body is snapped into the installation groove; at the same time, the clamping plate is inserted between the end plate and the battery cell group, and then the end plate and the battery cell are locked by the locking band, so that the two sides of the clamping plate are respectively abutted against the end plate and the battery cell group, and the base body is respectively connected and fixed to the battery cell group and the end plate by the locking force of the locking band, which can effectively improve the installation stability of the base body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the solutions in the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the end plate in an embodiment of the present utility model;

[0021] Figure 4This is a schematic diagram of the exploded structure of the output stage base in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic structural diagram of the output stage base from another perspective in an embodiment of the present utility model;

[0023] Figure 6 It is a structural schematic diagram of the limiting nut in the embodiment of the utility model. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0025] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this disclosure may be combined with other embodiments.

[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1-6 As shown, a battery module includes a cell group 1 formed by multiple cell cells connected in series, and end plates 2 are provided at both ends of the cell group 1. Locking bands 3 are sleeved on the outer periphery of the cell group 1 and the end plates 2. The end plates 2 and the cell group 1 are locked by the locking bands 3, so that all the cells form an integral structure. An output pole piece 11 is provided on the cell group 1, and an output pole base 4 for fixing the output pole piece 11 is provided on the end plate 2. The output pole base 4 is respectively connected to the end plate 2 and the cell group 1 in a limiting manner. The output pole base 4 can be fixed between the cell group 1 and the end plate 2 by the locking band 3, thereby improving the installation stability of the output pole base 4 and ensuring the stability of the structure.

[0028] In this embodiment, there are two locking bands 3. By providing two locking bands 3, the contact force between the end plate 2 and the battery cell group 1 can be improved, thereby improving the structural stability of the battery module; in other embodiments, the number of locking bands 3 can also be other numbers.

[0029] Specifically, the output pole base 4 includes a base body 41, which is made of an insulating material, such as rubber material, etc. A rear isolation plate 42 is provided at the rear end of the base body 41, and side isolation plates 43 are provided on both sides of the base body 41. The side isolation plates 43 and the rear isolation plates 42 protrude from the upper end surfaces of the base body 41 respectively; by arranging the side isolation plates 43 and the rear isolation plates 42, the base body 41 forms a semi-enclosed structure, and the three sides are higher than the end surfaces of the base body 41, so that it can be insulated and isolated from the end plate 2, avoiding the problem of contact between the output pole piece 11 and the end plate 2, ensuring electrical safety, and improving working stability.

[0030] A snap-on plate 44 is provided on the periphery of one end of the side isolation plate 43 away from the base body 41. This plate is used to securely connect the base body 41 to the end plate 2 and the cell group 1. During assembly, the snap-on plate 44 is inserted between the cell group 1 and the end plate 2 and then tightened with the locking band 3, so that the snap-on plate 44 abuts against the cell group 1 and the end plate 2, respectively, to secure the cell group 1 and the end plate 2. The locking force of the locking band 3 secures the base body 41 to the end plate 2 and the cell group 1, respectively. Actual measurements have shown that the locking force of the locking band 3 can reach 3000-5000N, ensuring the stability of the output pole base 4 installation, preventing loosening and extending its service life.

[0031] In this embodiment, the rear isolation plate 42, the side isolation plate 43 and the clamping plate 44 are respectively integrally formed with the base body 41. The one-piece structure does not require the additional provision of an insulating isolation baffle, simplifies the mechanical structure, thereby reducing assembly difficulty and improving production efficiency.

[0032] To facilitate assembly, a mounting groove 21 adapted to the base body 41 is provided on the upper end surface of the end plate 2. The base body 41 is limitedly engaged with the mounting groove 21. A positioning post 22 is provided in the mounting groove 21. A positioning hole 45 is provided on the lower end surface of the base body 41. The positioning post 22 is plugged into and fixed to the positioning hole 45. During assembly, the positioning hole 45 is first aligned and plugged into the positioning post 22, thereby installing the base body 41 on the end plate 2 until the base body 41 is snapped into the mounting groove 21. At the same time, the clamping plate 44 is inserted between the end plate 2 and the battery cell group 1. The end plate 2 and the battery cell are then locked by the locking band 3, so that the two sides of the clamping plate 44 are respectively in contact with the end plate 2 and the battery cell group 1. The locking force of the locking band 3 locks the base body 41 to the battery cell group 1 and the end plate 2, respectively, which can effectively improve the installation stability of the base body 41.

[0033] In this embodiment, there are four positioning posts 22 and four positioning holes 45, and the two are arranged in a one-to-one correspondence. The four positioning posts 22 cooperate with the positioning holes 45 to ensure that the output pole base 4 and the end plate 2 are plugged and fixed. In other embodiments, the number of positioning posts 22 and the positioning holes 45 can also be any other number, as long as it is ensured that the two can be plugged and fixed to each other.

[0034] After assembly, the positioning holes 45 and the positioning posts 22 form a first locking force on the output base 4. The mounting slots 21 engage the base body 41 to create a second locking force. The locking bands 3 then lock the connecting blocks to the end plate 2 and cell pack 1, respectively, creating a third locking force. These three locking forces secure the output base 4 to the end plate 2 and limit its position with the cell pack 1, significantly improving the installation stability of the output base 4, preventing it from loosening and enhancing the overall structural stability of the battery module.

[0035] To facilitate the insertion of the output pole base 4 between the end plate 2 and the cell group 1, a clearance groove 23 is provided on the rear end face of the end plate 2. When installing the output pole base 4, after inserting the positioning column 22 into the positioning hole 45, the clamping plate 44 is clamped into the clearance groove 23, thereby securing the output pole base 4 to the end plate 2 in a positional connection. When the output pole base 4 is clamped and secured to the end plate 2, the rear end face of the clamping plate 44 is flush with the rear end face of the end plate 2, allowing the locking band 3 to securely lock the end plate 2, the clamping plate 44, and the cell group 1. The provision of the clearance groove 23 enables the rear end face of the end plate 2 to abut against the end face plane of the cell group 1, increasing the abutting force-bearing area between the end plate 2 and the cell group 1, thereby improving the structural stability of the battery module.

[0036] To facilitate installation of the output electrode 11 on the battery pack 1, a mounting surface 46 is provided on the base body 41. A retaining nut 5 is provided on the mounting surface 46 for securing the output electrode 11. The retaining nut 5 is threadedly connected to the fixing hole. During installation, the output electrode 11 is placed on the retaining nut 5 and then fixed to the retaining nut 5 by installing the fixing bolt, thereby establishing electrical connection between the output electrode 11 and the retaining nut 5. This allows the battery module to be charged and discharged by connecting an external electrical device through the retaining nut 5.

[0037] In this embodiment, a threaded hole 47 is provided on the mounting surface 46 at a position corresponding to the retaining nut 5, and the retaining nut 5 is threadedly connected to the threaded hole 47. Compared to the existing interference fit between the nut and the output terminal base 4, the retaining nut 5 in this battery module is threadedly connected to the base body 41, which ensures a more secure installation of the retaining nut 5 and further ensures the reliability of the bolt fixing the output terminal aluminum sheet. If the connection is loose, the connection will be unreliable, and the temperature will rise significantly when current passes through this connection, posing a safety risk.

[0038] To facilitate installation and removal of the limit nut 5, a slotted groove 51 is provided on the upper end surface of the limit nut 5. The slotted groove 51 facilitates insertion of a screwdriver to screw the limit nut 5 into or out of the threaded hole 47, thereby improving installation convenience. In other embodiments, the slotted groove 51 can also be replaced with other structures, such as a cross slot.

[0039] In this embodiment, two threaded holes 47 are provided on the mounting plane 46 of each base body 41, and a limiting nut 5 is provided in each threaded hole 47; in other embodiments, the number of threaded holes 47 and limiting nuts 5 can be any other number.

[0040] The above-mentioned specific implementation manner is a preferred implementation manner of the present utility model, and is not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation manner. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. An output pole base of a battery module, the battery module comprising a battery cell group consisting of a plurality of battery cells connected in series, end plates being provided at both ends of the battery cell group, locking bands being sleeved around the peripheries of the battery cell group and the end plates, an output pole piece being provided on the battery cell group, and an output pole base being provided on the end plates for fixing the output pole piece, characterized in that: The output pole base includes a base body, the base body is made of insulating material, a rear isolation plate is provided at the rear end of the base body, side isolation plates are provided on both sides of the base body, the side isolation plates and the rear isolation plate respectively protrude from the upper end surface of the base body, a clamping plate is provided on the periphery of one end of the side isolation plate away from the base body, the rear isolation plate, the side isolation plate and the clamping plate are respectively integrally formed with the base body, the clamping plate is inserted between the battery cell group and the end plate, and is respectively abutted against the end plate and the battery cell group for limiting position; The upper end surface of the end plate is provided with a mounting groove adapted to the base body, the base body is limitedly engaged with the mounting groove, a positioning column is provided in the mounting groove, a positioning hole is provided on the lower end surface of the base body, and the positioning column is plugged and fixed with the positioning hole.

2. The output terminal base of the battery module according to claim 1, characterized in that: An avoidance groove is provided on the rear end surface of the end plate, the clamping plate is inserted into the avoidance groove, and the rear end surface of the clamping plate is flush with the rear end surface of the end plate.

3. The output terminal base of the battery module according to claim 1, characterized in that: The base body is provided with a mounting plane, the mounting plane is provided with a limiting nut for fixing the output pole piece, and the limiting nut is threadedly connected to the fixing hole.

4. The output terminal base of the battery module according to claim 3, characterized in that: A threaded hole is provided on the installation plane at a position corresponding to the limiting nut, and the limiting nut is threadedly connected to the threaded hole.

5. The output terminal base of the battery module according to claim 4, characterized in that: There are two threaded holes and two limiting nuts respectively, and the two are arranged in a one-to-one correspondence.

6. The output terminal base of the battery module according to claim 4, characterized in that: A slot or a cross slot is provided on the upper end surface of the limiting nut.

7. The output terminal base of the battery module according to any one of claims 1 to 6, characterized in that: There are four positioning posts and four positioning holes respectively, and the two are arranged in a one-to-one correspondence.

8. A battery module comprising the output electrode base according to any one of claims 1 to 7, characterized in that: It also includes a battery cell group consisting of multiple battery cells connected in series, with end plates provided at both ends of the battery cell group, the output pole base is connected to the end plates, the clamping plate is clamped between the end plates and the battery cell group, and a locking belt is sleeved on the end plate, and the locking belt can lock the end plate, the battery cell group and the base body.

9. The battery module according to claim 8, wherein: There are two locking belts.

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