Connecting piece and battery performance testing device

Abstract

The utility model provides a connecting piece and a battery performance testing device, and relates to the technical field of batteries. The connecting piece is applied to a single battery and comprises a connecting plate and a plurality of clamping plates, the connecting plate is provided with a welding surface, and the welding surface is configured to be welded with the battery monomers; the clamping plates are connected with the connecting plate and located on the same side of the connecting plate, the welding face is located in an area defined by the clamping plates, and the side, facing the welding face, of each clamping plate is configured to abut against the peripheral side wall of the single battery. According to the invention, the clamping plates abutted against the peripheral side walls of the single batteries are arranged, so that the connecting piece does not need to be clamped on the single batteries by a tool, and the connecting piece can be directly clamped and fixed on the single batteries through a plurality of clamping plates. Therefore, the matching stability of the connecting piece and the battery monomer can be improved, so that the connecting piece and the battery monomer can be smoothly welded, and the welding reliability between the connecting piece and the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a connector and a battery performance testing device. Background Art

[0002] The power battery system is a critical component of new energy vehicles, providing energy for driving and control. The electrical performance of the battery system directly impacts the vehicle's driving experience. Therefore, developing high-performance battery systems with greater efficiency and lower cost is a constant challenge for the new energy battery industry.

[0003] During the product development phase, the electrical performance parameters of the battery system need to be characterized through testing. Before testing individual battery cells, connectors must be welded to the battery cell electrodes using welding equipment. However, in related technologies, connectors are sheet-like structures, which can easily shift relative to the battery cell due to lack of alignment. This can lead to poor welding between the connector and the battery cell. Utility Model Content

[0004] The embodiments of the present application provide a connector and a battery performance testing device, which can improve the reliability of welding between the connector and the battery cell.

[0005] In the first aspect, an embodiment of the present application provides a connector, which is applied to a battery cell, and the connector includes a connecting plate and multiple card plates; the connecting plate has a welding surface, and the welding surface is configured to be welded to the battery cell; multiple card plates are connected to the connecting plate and are located on the same side of the connecting plate, and the welding surface is located in the area enclosed by the multiple card plates, and the side of each card plate facing the welding position is configured to abut against the peripheral side wall of the battery cell.

[0006] In one embodiment, the side of the clamping plate facing the welding surface is a mating surface, and a protrusion is provided on the mating surface. The protrusion is configured to abut against the peripheral side wall of the battery cell.

[0007] In one embodiment, the battery cell is a cylindrical battery cell, and the plurality of clamping plates are configured to be spaced apart and distributed along the circumference of the cylindrical battery cell.

[0008] In one embodiment, the clamping plate is an arc-shaped plate, and the axis of the cylinder where the arc-shaped plate is located is configured to coincide with the axis of the battery cell.

[0009] In one embodiment, a positioning hole is provided on the welding surface, the positioning hole is configured to cooperate with the pole of the battery cell, and the positioning hole is located between the plurality of clamping plates.

[0010] In one embodiment, a sink is provided on the other side of the connecting plate, and the sink is coaxially arranged with the positioning hole along the axial direction of the positioning hole, and / or the depth of the positioning hole is d2, satisfying: 0.5mm≤d2≤2mm.

[0011] In one embodiment, a communicating hole is provided on the bottom wall of the sink, the communicating hole is connected to the positioning hole, and / or the depth of the sink is d1, which satisfies: 0<d1≤0.5mm.

[0012] In one embodiment, the connector further includes a connecting arm, one end of which is connected to the connecting plate, and the other end of which is configured to be connected to the signal acquisition harness.

[0013] In one embodiment, a connection hole is provided at the other end of the connecting arm, and the connection hole is configured to be connected to the signal acquisition harness, and / or, there are two connecting arms, and the two connecting arms are spaced apart and arranged on the connecting plate.

[0014] In a second aspect, an embodiment of the present application provides a battery performance testing device, which includes the aforementioned connector.

[0015] Beneficial effects of the embodiments of the present application:

[0016] In the embodiments of the present application, by providing a clamping plate that abuts against the peripheral sidewalls of the battery cell, the connector can be directly secured to the battery cell using multiple clamping plates, eliminating the need for fixtures to clamp the connector to the battery cell. This improves the stability of the connector's fit with the battery cell, facilitates smooth welding of the connector to the battery cell, and thus improves the reliability of the weld between the connector and the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic structural diagram of a connector provided in an embodiment of the present application;

[0019] Figure 2 is a structural schematic diagram of another connecting member provided in an embodiment of the present application;

[0020] Figure 3 is a structural schematic diagram of a connector from another perspective provided by an embodiment of the present application;

[0021] Figure 4 is a bottom view of a connector provided in an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the connection member provided in an embodiment of the present application and the battery cell;

[0023] Figure 6 yes Figure 5 Cross-sectional view of CC;

[0024] Figure 7 is a top view of a connector provided in an embodiment of the present application;

[0025] Figure 8 Figure 7 Cross-sectional view of AA;

[0026] Figure 9 yes Figure 8 Enlarged view of point B in the middle.

[0027] Description of reference numerals:

[0028] 001-connector;

[0029] 011-connecting plate; 111-positioning hole; 112-sinking platform; 113-connecting hole; 114-welding surface;

[0030] 012-card plate; 121-matching surface; 122-protrusion;

[0031] 013-connecting arm; 131-connecting hole;

[0032] 002-battery cell; 021-pole; 022-side wall. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0034] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application. The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] In the description of the embodiments of this application, words such as "example" or "for example" are used to indicate an example, illustration, or description. Any embodiment or design described as "for example" or "for example" in the embodiments of this application is not to be construed as being preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to clearly present relative concepts.

[0037] To facilitate understanding of the solution of the present application, the spline curves and arrows used in the drawings are explained here: the components indicated by the spline curves without arrows are solid components, that is, components with solid structures; the components indicated by the spline curves with arrows are virtual components, that is, components without solid structures.

[0038] See also Figure 1 , Figure 1 : is a structural schematic diagram of a connector 001 provided in an embodiment of the present application. An embodiment of the present application provides a connector 001. Connector 001 is applied to a battery cell. Connector 001 includes a connecting plate 011 and a plurality of card plates 012. One side of the connecting plate 011 is configured to be welded to the battery cell. A plurality of card plates 012 are connected to the connecting plate 011 and are located on the same side of the connecting plate 011, and the welding surface 114 is located in the area enclosed by the plurality of card plates 012. The side of each card plate 012 facing the welding surface is configured to abut against the peripheral side wall of the battery cell.

[0039] The welding surface 114 is configured to be welded to a terminal of a battery cell.

[0040] It can be understood that when the battery cell is a cylindrical battery cell, the connecting plate 011 is a circular plate, and the plurality of clamping plates 012 are configured to be distributed along the circumference of the cylindrical battery, such as Figure 1 When the battery cell is a square battery cell, the connecting plate 011 is a rectangular plate, and the plurality of card plates 012 are divided into two groups, and the two groups of card plates 012 are configured to be spaced apart along the width direction of the square battery cell, as shown. Figure 2 As shown, Figure 2 001 is a structural diagram of another connector 001 provided in an embodiment of the present application, wherein two sets of clamping plates 012 are respectively in contact with the large surfaces of the square battery cells.

[0041] In addition, the clamping plate 012 can be integrally formed with the connecting plate 011 .

[0042] Specifically, when welding connector 001 to a battery cell, first move connector 001 above the battery cell's terminal, with the welding surface facing the terminal. Then, move connector 001 along the terminal's axis toward the battery cell until the terminal contacts the welding surface 114. Simultaneously, the side of clamping plate 012 facing welding surface 114 abuts the sidewall of the battery cell. Connector 001 is then welded to the battery cell's terminal using welding equipment.

[0043] In this embodiment, by providing a clamping plate 012 that abuts against the peripheral sidewalls of the battery cell, there is no need to use a tool to clamp the connector 001 to the battery cell. The connector 001 can be directly fixed to the battery cell via multiple clamping plates 012. This improves the stability of the connection between the connector 001 and the battery cell, facilitates smooth welding of the connector 001 and the battery cell, and thus improves the reliability of the welding between the connector 001 and the battery cell.

[0044] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of connector 001 from another perspective provided by an embodiment of the present application. In one embodiment, the side of the clamping plate 012 facing the welding surface 114 is a mating surface 121. Mating surface 121 is provided with a protrusion 122. Protrusion 122 is configured to abut against the peripheral side wall of the battery cell.

[0045] It can be understood that when connector 001 is in its original state, the distance between any two protrusions 122 is smaller than the distance between the areas on the battery cell where these two protrusions 122 abut. This allows connector 001 to abut the battery cell based on these protrusions 122, resulting in an interference fit between protrusions 122 and the surrounding sidewalls of the battery cell. Therefore, when connector 001 is mated with the battery cell, the abutment of protrusions 122 against the surrounding sidewalls of the battery cell creates a thrust against protrusions 122 from the surrounding sidewalls of the battery cell. This causes clip 012 to rotate about its connection with connecting plate 011 toward a side away from the axis of positioning hole 111, thereby aligning the distance between any two protrusions 122 with the distance between the areas on the battery cell where these two protrusions 122 abut. In this way, multiple clips 012 can be clamped to the battery cell through the interference fit between protrusions 122 and the battery cell.

[0046] One end of the protrusion 122 connected to the mating surface 121 is provided with a chamfer, so that the mating surface 121 smoothly transitions to the side wall of the protrusion 122 .

[0047] In this embodiment, through the above-mentioned arrangement, the connector 001 can be interference-fitted with the battery cell based on the protrusion 122, thereby increasing the clamping force of the connector 001 clamping the battery cell, and further improving the stability of the fit between the connector 001 and the battery cell, so as to facilitate smooth welding of the connector 001 and the battery cell.

[0048] See also Figure 4 , Figure 4 FIG1 is a side view of a connector 001 provided in an embodiment of the present application. In one embodiment, the protrusion 122 is a strip-shaped structure. The strip-shaped structure is configured to extend along the circumference of the battery cell.

[0049] It can be understood that when the battery cell is a cylindrical battery cell, the strip structure is extended along an arc coaxial with the battery cell; when the battery cell is a directional battery cell, the strip structure abuts against the large surface of the square battery cell, so the strip structure is extended along the long side of the square battery cell.

[0050] In this embodiment, through the above-mentioned arrangement, the area of ​​the mating surface 121 of the protrusion 122 in the circumferential direction of the battery cell can be increased, thereby improving the reliability of the fit between the connector 001 and the battery cell, and further improving the position stability of the connector 001, so as to facilitate the smooth welding of the connector 001 and the battery cell.

[0051] See also Figure 4 In one embodiment, the battery cell is a cylindrical battery cell, and the plurality of card plates 012 are configured to be distributed along the circumference of the cylindrical battery.

[0052] Specifically, there are four card plates 012 , and the four card plates 012 are spaced apart along the circumference of the cylindrical battery.

[0053] In addition, the connecting plate 011 is a circular plate, which is coaxially arranged with the cylindrical battery cell. Four clamping plates 012 are spaced apart along the circumference of the connecting plate 011. One end of the clamping plate 012 is connected to the portion of the connecting plate 011 near its edge.

[0054] In this embodiment, by configuring multiple card plates 012 to be distributed at intervals along the circumference of the cylindrical battery, the force on the mating parts between the connector 001 and the battery cell can be symmetrical, thereby improving the force state of the mating parts and further improving the reliability of the mating between the connector 001 and the battery cell.

[0055] See also Figure 3 In one embodiment, the card plate 012 is a curved plate. The axis of the cylinder where the curved plate is located is configured to coincide with the axis of the battery cell.

[0056] In this embodiment, by setting the card plates 012 as arc-shaped plates, a space for matching with the battery cells can be formed between the card plates 012 , the thickness of the card plates 012 can be made uniform, and the volume of the card plates 012 can be controlled.

[0057] See also Figure 3 In one embodiment, a positioning hole 111 is provided on the welding surface 114. The positioning hole 111 is configured to cooperate with the pole of the battery cell, such as Figure 5 and Figure 6 As shown, Figure 5 This is a schematic diagram of the connection member 001 provided in the embodiment of the present application and the battery cell. Figure 6 yes Figure 5 The positioning holes 111 are located between the plurality of card plates 012.

[0058] Specifically, the positioning hole 111 is configured to be gap-matched with the pole of the battery cell.

[0059] Specifically, the side of the clamping plate 012 facing the axis of the welding location positioning hole 111 is configured to abut against the peripheral side wall of the battery cell.

[0060] It can be understood that when welding connector 001 to a battery cell, the welding surface is first aligned with the battery cell's terminal, with retaining plate 012 positioned on one side of the corresponding peripheral wall. Connector 001 is then moved along the terminal's axis toward the battery cell, inserting the battery cell's terminal into positioning hole 111. Meanwhile, the side of retaining plate 012 facing the axis of positioning hole 111 abuts against the battery cell's peripheral wall. Connector 001 is then welded to the battery cell's terminal using welding equipment.

[0061] In this embodiment, the positioning holes 111 are provided to improve the matching accuracy between the connector 001 and the battery cell, thereby improving the accuracy of the welding position between the connector 001 and the battery cell terminal. This facilitates smooth welding of the connector 001 and the battery cell.

[0062] See also Figure 1 In one embodiment, a sink 112 is provided on the other side of the connecting plate 011. The sink 112 is coaxially arranged with the positioning hole 111 along the axial direction of the positioning hole 111.

[0063] In this embodiment, by providing the sinking platform 112, after the connector 001 is assembled to the battery cell, the pole position can be positioned by the sinking platform 112, thereby determining the welding position on the connector 001, thereby improving the ease of welding.

[0064] In addition, the provision of the sink 112 can also avoid the generation of welding slag and weld explosion during welding, thereby improving the welding quality and the accuracy of data collection based on the connector 001.

[0065] See also Figure 7 and Figure 8 , Figure 7 is a top view of the connector 001 provided in an embodiment of the present application, Figure 8 Figure 7 In one embodiment, the bottom wall of the sink 112 is provided with a connecting hole 113. The connecting hole 113 is connected to the positioning hole 111.

[0066] In this embodiment, the provision of the connecting hole 113 helps to reduce stress concentration generated during the welding process and lowers the risk of deformation of the connecting member 001.

[0067] See also Figure 9 , Figure 9 yes Figure 8 An enlarged view of point B in the middle. In one embodiment, the depth of the sink 112 is d1, which satisfies the following: 0<d1≤0.5mm.

[0068] It can be understood that the depth d1 of the sink 112 includes but is not limited to 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.15mm, 0.17mm, 0.18mm, 0.2mm, 0.23mm, 0.25mm, 0.27mm, 0.3mm, 0.31mm, 0.32mm, 0.34mm, 0.35mm, 0.37mm, 0.39mm, 0.4mm, 0.42mm, 0.45mm, 0.48mm, and 0.5mm.

[0069] In this embodiment, through the above definition, a sink 112 can be formed on the connecting plate 011 to facilitate welding; and the depth of the sink 112 can be avoided to affect the strength of the connecting piece, thereby ensuring the reliability of welding between the connecting piece and the battery cell.

[0070] See also Figure 9 In one embodiment, the depth of the positioning hole 111 is d2, which satisfies: 0.5 mm ≤ d2 ≤ 2 mm.

[0071] It can be understood that the depth d1 of the sink 112 includes but is not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.45mm, 1.5mm, 1.7mm, 1.8mm, 1.9mm, 1.95mm, and 2mm.

[0072] In this embodiment, through the above-mentioned limitation, a positioning hole 111 can be formed on the connecting plate 011, so as to facilitate forming a portion on the connector 001 that matches the pole of the battery cell, thereby improving the position accuracy of the connector 001; and the positioning hole 111 can be prevented from being too deep and affecting the strength of the connecting piece, thereby ensuring the reliability of the welding between the connecting piece and the battery cell.

[0073] See also Figure 1 In one embodiment, the connector 001 further includes a connecting arm 013. One end of the connecting arm 013 is connected to the connecting plate 011. The other end is configured to be connected to a signal acquisition harness.

[0074] It is understood that the connecting arm 013 can be connected to the side of the card plate 012 facing away from the battery cell, or to the periphery of the connecting plate 011, or to the side of the connecting plate 011 facing away from the welding surface 114. The specific connection location should be determined so that the connecting arm does not interfere with the battery performance test.

[0075] In this embodiment, by providing the connecting arm 013, a larger operating space can be provided when the connector 001 is connected to the signal acquisition harness, thereby improving the operability of the connection between the connector 001 and the signal acquisition harness.

[0076] See also Figure 1 In one embodiment, the other end of the connecting arm 013 is provided with a connecting hole 131. The connecting hole 131 is configured to be connected to a signal acquisition harness.

[0077] In this embodiment, by providing the connection hole 131, the connector 001 can be connected to the signal acquisition harness by screws, thereby improving the reliability and operability of the connection between the connector 001 and the signal acquisition harness.

[0078] See also Figure 1 In one embodiment, there are two connecting arms 013. The two connecting arms 013 are spaced apart and arranged on the connecting plate 011.

[0079] In this embodiment, by providing two connecting arms 013, connector 001 can output a voltage signal through one connecting arm 013 and a temperature signal through the other connecting arm 013. This, on the one hand, separates the measurement points of the voltage and temperature signals, reducing mutual interference and improving the accuracy of their respective measurements; on the other hand, the separate outputs of voltage and temperature by the two connecting arms 013 facilitate fault diagnosis and location.

[0080] Accordingly, an embodiment of the present application provides a battery performance testing device, which includes the aforementioned connector 001.

[0081] In this embodiment, by adopting the aforementioned battery performance testing device, the stability of the cooperation between the connector 001 and the battery cell can be improved, so as to facilitate the smooth welding of the connector 001 and the battery cell, thereby improving the reliability of the welding between the connector 001 and the battery cell, and ultimately improving the accuracy of the battery performance test.

[0082] 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.

Claims

1. A connector, applied to a battery cell, characterized in that: The connecting piece includes: a connecting plate having a welding surface configured to be welded to the battery cell; A plurality of card plates are connected to the connecting plate and are located on the same side of the connecting plate. The welding surface is located in the area enclosed by the plurality of card plates. The side of each card plate facing the welding surface is configured to abut against the peripheral side wall of the battery cell.

2. The connector according to claim 1, wherein: A side of the clamping plate facing the welding surface is a mating surface. The mating surface is provided with a protrusion, and the protrusion is configured to abut against the peripheral side wall of the battery cell.

3. The connector according to claim 1, wherein: The battery cell is a cylindrical battery cell, and the plurality of clamping plates are configured to be distributed at intervals along the circumference of the cylindrical battery.

4. The connector according to claim 3, wherein: The clamping plate is an arc-shaped plate, and the axis of the cylinder where the arc-shaped plate is located is configured to coincide with the axis of the battery cell.

5. The connector according to any one of claims 1 to 4, characterized in that: A positioning hole is provided on the welding surface, and the positioning hole is configured to cooperate with the pole of the battery cell.

6. The connector according to claim 5, characterized in that A sink is provided on the other side of the connecting plate, and along the axial direction of the positioning hole, the sink is coaxially arranged with the positioning hole, and / or the depth of the positioning hole is d2, satisfying: 0.5mm≤d2≤2mm.

7. The connector according to claim 6, characterized in that The bottom wall of the sink is provided with a communicating hole, the communicating hole is communicated with the positioning hole, and / or the depth of the sink is d1, which satisfies: 0<d1≤0.5mm.

8. The connector according to any one of claims 1 to 4, characterized in that: The connector also includes a connecting arm, one end of which is connected to the connecting plate, and the other end of which is configured to be connected to a signal acquisition harness.

9. The connecting piece according to claim 8, characterized in that The other end of the connecting arm is provided with a connecting hole, and the connecting hole is configured to be connected to the signal acquisition harness, and / or there are two connecting arms, and the two connecting arms are spaced apart and arranged on the connecting plate.

10. A battery performance testing device, characterized in that: The invention comprises a connecting piece according to any one of claims 1 to 9.

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