A battery transfer structure, connecting piece, connecting structure and battery module

Abstract

The present invention is applicable to the field of battery technology and provides a battery transfer structure, a connecting piece, a connection structure, and a battery module. The battery transfer structure of the present invention can be fixed on a battery pole. The transfer structure includes a transfer portion and a connector. The connector is plugged into the transfer structure so that the transfer portion is placed in the accommodating space of the connector. Under the elastic force of the elastic member in the transfer portion, the connector is in close contact with the battery pole, thereby completing the mechanical and electrical connection. The above battery transfer structure and the connector constitute a battery connection structure. The battery connection structure can be used to connect multiple single cells in series or parallel as required to form a battery module. The battery module assembly structure of the present invention is simple, does not require any welding process, has low production equipment cost, high production efficiency, and is easy to assemble and disassemble, which facilitates the subsequent maintenance of the battery module and improves the feasibility of cascade recycling.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a battery transfer structure, a connecting piece, a connecting structure and a battery module. Background Art

[0002] In existing battery modules, cells are electrically connected via connectors, and the connections between the cells and the connectors, and between the connectors and the battery terminals, are welded. This approach has the drawback that, if a component of the module develops a problem during manufacturing or assembly, or during user use, the module cannot be disassembled for repair, replacement, or maintenance, often requiring the entire module to be discarded.

[0003] Therefore, it is necessary to provide a connection structure with simple structure, convenient maintenance, high recycling rate and stable structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery transfer structure, a connecting piece, a connecting structure and a battery module, aiming to solve the technical problems in the prior art that the battery module is inconvenient to disassemble and assemble and has a low recycling rate.

[0005] The present invention is implemented as follows: a battery adapter structure, which is detachably connected to a battery connector and connected to a pole of a battery unit, includes an adapter portion and a connector, wherein:

[0006] The adapter portion includes a first plate, a second plate, and an elastic member, wherein the first plate is connected to the first end of the connecting member, and the first plate has no degree of freedom in a first direction, which is a direction perpendicular to the axis of the connecting member;

[0007] The second plate is slidably connected to the connecting member;

[0008] The first plate and the second plate are stacked and connected along the thickness direction of the transition portion, a spring accommodating cavity is formed between the first plate and the second plate, the elastic member is accommodated in the spring accommodating cavity, and both ends of the elastic member in the elastic direction abut against the first plate and the second plate respectively;

[0009] The elastic force of the elastic member can cause the second plate to move away from the first plate along the axial direction of the connecting member.

[0010] Furthermore, one end of the elastic member is fixedly connected to the first plate, and the other end of the elastic member is fixedly connected to the second plate.

[0011] Furthermore, a first positioning portion is provided on the first plate.

[0012] Furthermore, a first through hole is provided on the first positioning portion, a second through hole is provided on the second plate, and the first through hole and the second through hole are coaxial.

[0013] The present invention further provides a battery connector, comprising a connector body and a bent portion, wherein the bent portion comprises an inserting portion and a connecting portion, wherein the inserting portion is connected to the connector body via the connecting portion, and an accommodating space is formed between the inserting portion and the connector body, wherein the accommodating space is used to accommodate the adapter portion of the battery adapter structure.

[0014] When the battery connecting piece is plugged into the adapter, the connecting piece body is located on the side of the first plate facing away from the second plate, and the plugging portion is located on the side of the second plate facing away from the first plate. The plugging portion enables the second plate to move toward the first plate along the axial direction of the connector and compress the elastic member.

[0015] After the battery connecting piece is plugged into the adapter, the adapter is located in the accommodating space, and the elastic force of the elastic member causes the second plate to move away from the first plate and to be in close contact with the plug-in portion.

[0016] Furthermore, the outer surfaces of the connecting piece body and the bent portion are covered with a conductive layer.

[0017] Furthermore, a second positioning portion is provided on the connecting piece body.

[0018] Furthermore, a third through hole is provided on the plug-in portion.

[0019] The present invention also provides a battery connection structure for electrically connecting poles between battery cells, which includes the above-mentioned battery transfer structure and the above-mentioned battery connection sheet;

[0020] The connecting piece is used to be fixedly connected to the pole, and the second plate is opposite to the pole; the plug-in portion is inserted between the second plate and the pole to make the battery connecting piece in close contact with the pole.

[0021] Furthermore, a first positioning portion is provided on the first plate, and a second positioning portion is provided on the connecting piece body, and the first positioning portion and the second positioning portion limit the movement of the connecting piece body in the first direction.

[0022] Furthermore, a first through hole is provided on the first positioning portion, a second through hole is provided on the second plate, and a third through hole is provided on the plug-in portion, and the first through hole, the second through hole, and the third through hole are coaxial.

[0023] Furthermore, a fixing piece is included, and the fixing piece is inserted into the first through hole, the second through hole, and the third through hole.

[0024] The present invention further provides a battery module, characterized in that it comprises the aforementioned battery connection structure and battery cells, wherein the battery connection structure connects the battery cells in series or in parallel;

[0025] The battery cell includes a pole, the second end of the connector is fixedly connected to the pole of the battery cell, and the plug-in portion is inserted between the second plate and the pole of the battery cell to ensure close contact between the battery connecting piece and the pole.

[0026] The technical effects of the present invention relative to the prior art are:

[0027] The battery transfer structure of the present invention is fixedly connected to the battery unit, and the connecting piece is detachably snapped to the transfer structure. Therefore, the battery module assembled by the battery cell, the transfer structure and the connecting piece of the present invention does not require any laser welding, welding positioning tooling, or a laser welding machine during the entire assembly process, and the production equipment cost is low and the production efficiency is high; the connecting piece and the transfer structure of the present invention are snapped together, and due to the design of the elastic part structure and the positioning structure, the connecting piece is naturally snapped into place, avoiding complicated positioning, and the assembly operation is simpler and more convenient; the battery module of the present invention does not require any destructive dismantling during the later maintenance and replacement process and the cascade utilization process, ensuring that all parts are intact during the disassembly and replacement project, thereby improving the feasibility and low cost of cascade utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only 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.

[0029] Figure 1 This is a schematic diagram of the battery module structure provided in the fourth embodiment of the present invention;

[0030] Figure 2 is an exploded view of the battery switching structure provided in the first embodiment of the present invention;

[0031] Figure 3 This is a structural diagram of a battery unit equipped with a battery adapter structure provided in the first embodiment of the present invention;

[0032] Figure 4 is a structural diagram of a battery connecting piece provided in the second embodiment of the present invention;

[0033] Figure 5 The connection process between the battery connecting piece and the battery switching structure provided in the second or third embodiment of the present invention is Figure 1 ;

[0034] Figure 6 The connection process between the battery connecting piece and the battery switching structure provided in the second or third embodiment of the present invention is Figure 2 ;

[0035] Description of reference numerals:

[0036] In the figure, 10-battery unit, 11-battery pole, 20-battery connection structure, 30-adaptation structure, 300-adaptation part, 310-first plate, 311-first positioning part, 312-first through hole, 320-second plate, 321-second through hole, 330-elastic member, 340-connector, 40-battery connecting piece, 410-connecting piece body, 411-second positioning part, 420-bending part, 421-plug-in part, 422-connecting part, 423-third through hole, 50-battery module, S-spring accommodating cavity, w -gap. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0041] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0043] A battery module is usually made up of a certain number of battery cells connected in series or in parallel, such as Figure 1 The figure shows a schematic diagram of a battery module. The battery module 50 is formed by connecting a certain number of battery cells 10 in series. When realizing the connection between the battery cells 10, it is necessary to realize both physical connection and electrical connection between the battery cells 10.

[0044] The embodiment of the present invention simultaneously uses a battery transfer structure 30 and a connecting piece 20 when realizing the connection between the battery cells 10. When specifically connecting the battery cells 10, the connecting piece 20 can be directly inserted into the battery transfer structure 30, thereby realizing both physical and electrical connections between the battery cells 10.

[0045] Specifically, the present invention provides a battery transfer structure, a connecting piece, a connecting structure and a battery module, which will be described in detail in each embodiment below.

[0046] Example 1

[0047] like Figure 2 The exploded view of the battery switching structure of the first embodiment of the present invention is shown as follows: Figure 3 The figure shows a schematic diagram of the structure of a battery unit with a battery transfer structure installed.

[0048] The first embodiment of the present invention provides a battery adapter structure 30, which includes an adapter portion 300 and a connector 340. The adapter portion 300 can be used to achieve plugging of the connecting piece 20, and the connector 340 is used to connect to the pole 11 of the battery unit 10;

[0049] Specifically, the adapter 300 includes a first plate 310, a second plate 320, and an elastic member 330. The first plate 310 is connected to the first end of the connecting member 340. The first plate 310 has no degree of freedom in a first direction, which is a direction perpendicular to the axis of the connecting member 340.

[0050] In the first embodiment of the present invention, "the first plate 310 is connected to the first end of the connecting member 340" includes at least two methods: first, the first plate 310 is fixedly connected to the first end of the connecting member 340, such as by welding or threading; second, a corresponding through hole is provided on the first plate 310, and the first end of the connecting member 340 is passed through the through hole, without requiring the first end of the connecting member 340 to be fixedly connected to the first plate 310;

[0051] The core of the connection between the first plate 310 and the first end of the connecting member 340 is to make the first plate 310 have no freedom in the first direction. The purpose of this setting is that when the connecting piece 20 is plugged into the adapter 300, the connecting piece 20 may drive the first plate 310 to move along the first direction, and this movement is not expected. Therefore, it is necessary to limit the freedom of the first plate 310 in the first direction to ensure the smooth plugging of the connecting piece 20.

[0052] The connecting member 340 may be a stud bolt.

[0053] The second plate 320 is slidably connected to the connecting member 340;

[0054] When the connecting piece 20 is plugged into the adapter 300 , the connecting piece 20 will lift the second plate 320 , thereby setting the second plate 320 and the connecting member 340 in sliding connection.

[0055] The elastic member 330 is disposed between the first plate 310 and the second plate 320 .

[0056] When the connecting piece 20 is plugged into the adapter part 300, the connecting piece 20 will lift the second plate 320. Since an elastic member 330 is provided between the first plate 310 and the second plate 320, when the connecting piece 20 lifts the second plate 320, the elastic member 330 will also apply a downward restoring force to the second plate 320, thereby making the fit between the second plate 320 and the connecting piece 20 tighter.

[0057] The specific arrangement of the elastic member 330 may be at least as follows:

[0058] In the first embodiment, one end of the elastic member 330 is fixedly connected to the first plate 310, and the other end of the elastic member 330 is fixedly connected to the second plate 320; for example, the connection can be fixed by welding or the like;

[0059] In a second embodiment, a spring accommodating cavity S is formed between the first plate 310 and the second plate 320, and the elastic member 330 is disposed in the spring accommodating cavity S. In the second embodiment, one end of the elastic member 330 can be fixedly connected to the first plate 310, while one end of the elastic member 330 can be in a free state, and the other end of the elastic member 330 can be fixedly connected to the second plate 320, while the other end of the elastic member 330 can be in a free state.

[0060] It should be noted that the above manner is merely an example, and as long as the elastic member 330 can exert a downward restoring force on the second plate 320 , it falls within the scope of protection of the present invention.

[0061] Furthermore, a first positioning portion 311 is provided on the first plate 310 .

[0062] When the connecting piece 20 is plugged into the adapter 300 , the first positioning portion 311 can determine the position of the connecting piece 20 in the first direction.

[0063] It is worth mentioning that Figure 2 The first positioning portion 311 shown in the figure is a protrusion, and the first positioning portion 311 in the present invention can also be in other structural forms, such as a depression, a groove, etc.; in addition, Figure 2 The number of the first positioning portion 311 shown in the figure is one, but the number of the first positioning portion 311 in the present invention can also be multiple;

[0064] Furthermore, a first through hole 312 is provided on the first positioning portion 311 , and a second through hole 321 is provided on the second plate 320 . The first through hole 312 and the second through hole 321 are coaxial.

[0065] The first through hole 312 and the second through hole 321 are provided for installing a fixing member described below.

[0066] Example 2

[0067] like Figure 4 The figure shows a schematic diagram of a battery connecting piece provided in the second embodiment of the present invention. A battery connecting piece 40 in the second embodiment of the present invention includes a connecting piece body 410 and a bending portion 420. The bending portion 420 includes a plug-in portion 421 and a connecting portion 422. The plug-in portion 421 is connected to the connecting piece body 410 through the connecting portion 422. An accommodating space is formed between the plug-in portion 421 and the connecting piece body 410. The accommodating space is used to accommodate the transfer portion 300 of the battery transfer structure in the first embodiment.

[0068] like Figure 5-6 The figure shows the connection process of the battery connecting piece and the battery transfer structure; Figure 5In the process of inserting the battery connecting piece 40 into the battery adapter structure 30, due to the sliding connection between the second plate 320 and the connecting member 340, the connecting piece body 410 lifts the second plate 320, so that a gap is formed between the second plate 320 and the pole 11 of the battery cell. w , and compress the elastic member 330 at the same time. When the battery connecting piece 40 reaches the preset position, the second plate 320 is continuously lowered under the action of the restoring force of the elastic member 330, thereby eliminating the gap between the second plate 320 and the battery cell pole 11. w , so that the battery connecting piece 40 is in close contact with the pole 11.

[0069] Furthermore, the outer surface of the connecting piece body 410 and the bent portion 420 is coated with a conductive layer to form a stable electrical connection between the battery connecting piece 40 and the pole 11. As for the specific material of the conductive layer, it is, for example, a conductive metal layer.

[0070] Furthermore, in order to facilitate plugging and to position the battery connecting piece in a relatively fixed position after plugging, a second positioning portion 411 is provided on the connecting piece body 410 .

[0071] Furthermore, a third through hole 423 is provided on the plug-in portion 421 .

[0072] The third through hole 423 is provided for installing a fixing member described below.

[0073] Example 3

[0074] Continue to see Figure 5-6 The third embodiment of the present invention further provides a battery connection structure 20, which includes a battery transfer structure 30 as described in the first embodiment and a battery connection piece 40 as described in the second embodiment.

[0075] Specifically, a first positioning portion 311 is provided on the first plate 310 , and a second positioning portion 411 is provided on the connecting piece body 410 . The first positioning portion 311 and the second positioning portion 411 limit the movement of the connecting piece body 410 in the first direction.

[0076] After limiting the movement of the connecting piece body 410 in the first direction, the battery connecting piece 40 can be conveniently plugged into place on the battery transfer structure 30, and the battery connecting piece 40 can be prevented from being misplaced during shaking (such shaking may occur during the actual use of the battery module or during the actual production process of the battery module).

[0077] Regarding the specific structures of the first positioning portion 311 and the second positioning portion 411, Figure 5 and Figure 6The first positioning portion 311 shown in the figure is a protrusion, and the second positioning portion 411 is a groove. In fact, the first positioning portion 311 and the second positioning portion 411 can also have other structural forms. The scope of protection of the present invention is not limited to the form in which the first positioning portion 311 is a protrusion and the second positioning portion 411 is a groove.

[0078] For example, the first positioning portion 311 may be in the form of a depression, a groove, etc., and the second positioning portion 411 may be in the form of a protrusion;

[0079] Regarding the number of the first positioning portion 311 and the second positioning portion 411, Figure 5 and Figure 6 The number of the first positioning portion 311 and the second positioning portion 411 shown in FIG is one, but the number of the first positioning portion 311 and the second positioning portion 411 in the present invention can also be multiple;

[0080] In order to achieve a stable connection between the battery connection structure 20 and the battery cell 10, a first through hole 312 is provided on the first positioning portion 311, a second through hole 321 is provided on the second plate 320, and a third through hole 423 is provided on the plug-in portion 421. The first through hole 312, the second through hole 321, and the third through hole 423 are coaxial.

[0081] Furthermore, a fixing piece is included, and the fixing piece is passed through the first through hole 312 , the second through hole 321 , and the third through hole 423 . The fixing piece may be a screw, a bolt, or the like.

[0082] The battery connection structure 20 can be stably connected to the battery unit 10 through the fixing piece.

[0083] Example 4

[0084] Continue to see Figure 1 The fourth embodiment of the present invention provides a battery module 50, which includes the battery connection structure 20 and the battery cells 10 as described in the third embodiment, and the battery connection structure 20 connects the battery cells 10 in series or in parallel.

[0085] Furthermore, the second end of the connecting member 340 is fixedly connected to the pole 11 of the battery unit 10 .

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery transfer structure (30), which is detachably connected to a battery connecting piece and is connected to a pole of a battery unit, characterized in that: It comprises a transition portion (300) and a connecting piece (340), wherein: The adapter portion (300) comprises a first plate (310), a second plate (320), and an elastic member (330); the first plate (310) is connected to a first end of the connecting member (340); the first plate (310) has no degree of freedom in a first direction, which is a direction perpendicular to an axis of the connecting member (340); The second plate (320) is slidably connected to the connecting member (340); The first plate (310) and the second plate (320) are stacked and connected along the thickness direction of the transition portion (300); a spring accommodating cavity (S) is formed between the first plate (310) and the second plate (320); the elastic member (330) is accommodated in the spring accommodating cavity (S); and two ends of the elastic member (330) in the elastic direction respectively abut against the first plate (310) and the second plate (320); The elastic force of the elastic member (330) can cause the second plate (320) to move away from the first plate (310) along the axial direction of the connecting member (340).

2. A battery transfer structure (30) according to claim 1, characterized in that: One end of the elastic member (330) is fixedly connected to the first plate (310), and the other end of the elastic member (330) is fixedly connected to the second plate (320).

3. A battery transfer structure (30) according to claim 1, characterized in that: A first positioning portion (311) is provided on the first plate (310).

4. A battery transfer structure (30) according to claim 3, characterized in that: A first through hole (312) is provided on the first positioning portion (311), a second through hole (321) is provided on the second plate (320), and the first through hole (312) and the second through hole (321) are coaxial.

5. A battery connection structure (20) for electrically connecting poles between battery cells, characterized in that: The invention comprises a battery transfer structure (30) as claimed in any one of claims 1 to 2 and a battery connecting piece (40); the battery connecting piece (40) comprises a connecting piece body (410) and a bending portion (420); the bending portion (420) comprises a plug-in portion (421) and a connecting portion (422); the plug-in portion (421) is connected to the connecting piece body (410) through the connecting portion (422); an accommodating space is formed between the plug-in portion (421) and the connecting piece body (410); the connecting piece (340) is used for fixed connection with the pole; the second plate (320) is connected to the pole The poles are opposite to each other; when the battery connecting piece (40) is plugged into the adapter (300), the connecting piece body (410) is located on the side of the first plate (310) facing away from the second plate (320), the plug-in portion (421) is located on the side of the second plate (320) facing away from the first plate (310), the plug-in portion (421) is plugged between the second plate (320) and the pole, and the plug-in portion (421) can enable the second plate (320) to move toward the first plate (310) along the axial direction of the connecting piece (340) and compress the elastic piece (330); After the battery connecting piece (40) is plugged into the adapter (300), the adapter (300) is located in the accommodating space, and the elastic force of the elastic member (330) causes the second plate (320) to move away from the first plate (310) and to come into close contact with the plug-in portion (421).

6. A battery connection structure (20) according to claim 5, characterized in that: A first positioning portion (311) is provided on the first plate (310), and a second positioning portion (411) is provided on the connecting piece body (410), wherein the first positioning portion (311) and the second positioning portion (411) limit the movement of the connecting piece body (410) in a first direction.

7. A battery connection structure (20) according to claim 6, characterized in that: A first through hole (312) is provided on the first positioning portion (311), a second through hole (321) is provided on the second plate (320), and a third through hole (423) is provided on the plug-in portion (421); the first through hole (312), the second through hole (321), and the third through hole (423) are coaxial.

8. A battery connection structure (20) according to claim 7, characterized in that: It also includes a fixing piece, which is inserted into the first through hole (312), the second through hole (321), and the third through hole (423).

9. A battery connection structure (20) according to claim 5, characterized in that: The outer surfaces of the connecting piece body (410) and the bent portion (420) are coated with a conductive layer.

10. A battery module (50), characterized in that: The invention comprises a battery connection structure (20) and a battery unit (10) according to any one of claims 5 to 9, wherein the battery connection structure (20) connects the battery units (10) in series or in parallel; The battery cell (10) includes a pole (11), the second end of the connector (340) is fixedly connected to the pole (11) of the battery cell (10), and the plug-in portion (421) is plugged between the second plate (320) and the pole (11) of the battery cell (10), so that the battery connecting piece (40) is in close contact with the pole (11).

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