CN221150120U

CN221150120U - Elastic contact type sampling structure

Info

Publication number: CN221150120U
Application number: CN202323091444.4U
Authority: CN
Inventors: 钱科; 于国强; 杨洋; 孙心月; 刘新云
Original assignee: Lvjin New Energy Technology Changshu Co ltd
Current assignee: Lvjin New Energy Technology Changshu Co ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-06-14
Anticipated expiration: 2033-11-16

Abstract

The utility model discloses an elastic contact type sampling structure which comprises a battery cell support, wherein a battery cell is arranged in the battery cell support, a sampling plate is arranged on the battery cell support, pole contact spring pieces are welded on the sampling plate, the number of the pole contact spring pieces is the same as that of the battery cell, and the pole contact spring pieces are welded on one surface, close to the battery cell, of the sampling plate. Because the pole contact spring plates are adopted, the pole contact spring plates are welded on the sampling plate, the position of each pole contact spring plate corresponds to the position of the electrode cell, and the welding is replaced by the contact of the pole contact spring plates and the cell electrode, so that the direct connection of the sampling wire and the cell is avoided. For series-parallel connection between the electric cores, the connection can be realized more conveniently by wiring on the sampling plate and combining the pole contact spring pieces. Meanwhile, as the cell electrode and the pole contact spring sheet are in non-fixed connection, the difficulty of overhauling and replacing the cell is reduced.

Description

Elastic contact type sampling structure

Technical Field

The utility model relates to the field of energy storage equipment, in particular to an elastic contact type sampling structure.

Background

The energy storage device is typically composed of a plurality of battery modules, which are composed of a plurality of battery cells. In order to ensure safe operation of the energy storage device, the BMS (Battery MANAGEMENT SYSTEM Battery management system) needs to monitor the state of each Battery cell in real time, so as to ensure that the Battery cells work in a proper temperature and current environment. Therefore, the electrodes of each battery cell need to be connected to the BMS in a wiring mode, a welding mode is adopted in the normal case, after the battery cells are installed and fixed, sampling lines are welded at the electrodes of each battery cell, and the sampling lines are connected into the BMS so as to realize data monitoring of the battery cells. This approach has the following drawbacks:

(1) For battery modules with more battery cells, the difficulty of distributing and controlling the sampling lines is extremely high;

(2) When the working environment of the energy storage equipment is severe, the sampling line is directly welded on the fish cell electrode, so that faults are easy to occur, and even short circuit is caused;

(3) When the battery cell faults occur in the battery module, the maintenance and replacement are difficult.

In order to solve the above problems, it is necessary to provide a new cell sampling structure, which avoids direct welding contact between the sampling wire and the cell electrode, reduces the probability of failure of the sampling wire, and improves the convenience of overhauling and replacing the cell.

Disclosure of utility model

In order to solve the technical problems, the utility model provides an elastic contact type sampling structure, which is characterized in that pole contact spring pieces with the same number and corresponding positions as the battery cells are welded on a sampling plate, and the contact between the pole contact spring pieces and battery cell electrodes is used for replacing welding, so that the direct connection between a sampling line and the battery cells is avoided. Meanwhile, the battery cell can be conveniently detached, so that the difficulty of maintenance and replacement of the battery cell is reduced.

According to the elastic contact type sampling structure, the elastic contact type sampling structure comprises a battery cell support, a battery cell is arranged in the battery cell support, a sampling plate is arranged on the battery cell support, pole contact spring pieces are welded on the sampling plate, the number of the pole contact spring pieces is the same as that of the battery cells, and the pole contact spring pieces are welded on one surface, close to the battery cell, of the sampling plate.

As an alternative scheme of the technical scheme of the utility model, the battery cell support comprises an upper support, a lower support and a battery cell support, wherein battery cell limiting holes are formed in the positions, corresponding to each other, of the upper support and the lower support, the battery cell support is divided into two sections, the two sections are respectively arranged in the corresponding positions of the upper support and the lower support, and the upper support and the lower support are detachably spliced through connecting buckles and supported through the battery cell support.

As an alternative of the technical scheme of the utility model, the cell limiting hole is a through hole with a step, and the cell electrode is aligned with the through hole.

As an alternative scheme of the technical scheme of the utility model, the pole contact spring plate is a metal sheet with a plurality of pins, and the pins are all in the same U-shaped elastic bending structure along the direction perpendicular to the surface of the metal sheet.

As an alternative scheme of the technical scheme of the utility model, two connectors are further arranged on the sampling plate, and the connectors are arranged at two ends of the long side of the sampling plate and are positioned at the reverse side of the surface where the pole contact spring plate is positioned.

The beneficial effects obtained by the utility model are as follows: because the pole contact spring plates are adopted, the pole contact spring plates are welded on the sampling plate, the position of each pole contact spring plate corresponds to the position of the electrode cell, and the welding is replaced by the contact of the pole contact spring plates and the cell electrode, so that the direct connection of the sampling wire and the cell is avoided. For series-parallel connection between the electric cores, the connection can be realized more conveniently by wiring on the sampling plate and combining the pole contact spring pieces. Meanwhile, as the cell electrode and the pole contact spring sheet are in non-fixed connection, the difficulty of overhauling and replacing the cell is reduced.

The effects of the present utility model are not limited to the above-described effects, and those skilled in the art can obtain effects not described above from the following description.

Drawings

Fig. 1 is a schematic overall view of a spring contact sampling structure according to the present utility model.

Fig. 2 is a schematic view of a cell holder according to the present utility model.

Fig. 3 is a schematic diagram of a sampling plate according to the present utility model.

Fig. 4 is an enlarged schematic view of the portion a of fig. 3 in accordance with the present utility model.

Fig. 5 is a schematic view of a pole contact spring according to the present utility model.

Fig. 6 is a schematic diagram of the contact of the sampling plate with the cell according to the present utility model.

FIG. 7 is a schematic diagram of a single-sided connector sampling board trace in accordance with the present utility model.

FIG. 8 is a schematic diagram of a dual sided connector sampling board trace in accordance with the present utility model.

Wherein, 100-upper bracket; 110-a cell limiting hole; 120-connecting buckle; 130-cell pillars; 200-lower support; 300-cell; 400-sampling plate; 500-connectors; 600-pole contact spring pieces; 610-pins.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present utility model more apparent, the present utility model is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the following specific examples are intended to illustrate the utility model and are not intended to limit the utility model. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are based on the following examples, which fall within the scope of the utility model.

It should be noted that, in the description of the present utility model, the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the positional or positional relationship of the drawings, and are merely for convenience of description of the present utility model, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise specifically indicated and defined. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the elastic contact type sampling structure according to the present utility model includes a cell holder for holding a cell 300, the cell 300 is mounted in the cell holder, a sampling plate 400 is disposed on top of the cell holder, and connectors 500 are respectively disposed at left and right ends of an upper surface of the sampling plate 400. As shown in fig. 2, the cell holder according to the present utility model includes an upper holder 100 and a lower holder 200, the upper holder 100 and the lower holder 200 are detachably coupled by a lateral connecting buckle 120, and the upper holder 100 and the lower holder 200 are provided with cell pillars 130 aligned with each other, so that when the upper holder 100 and the lower holder 200 are coupled, the cell pillars 130 aligned with each other are also coupled to form a complete pillar, and when the cell 300 is subjected to a vertical pressure, the cell pillars 130 can protect the cell 300 from being extruded. The upper bracket 100 and the lower bracket 200 are also provided with the battery cell limiting holes 110, the upper and lower positions of the battery cell limiting holes 110 on the upper bracket 100 and the lower bracket 200 are aligned, the battery cell limiting holes 110 are through holes with steps, and when the battery cell 300 is fixedly installed, the positions of the battery cell electrodes are aligned with the through holes, so that the connection is convenient. Besides, the battery cell connection metal sheets can be arranged in the battery cell limiting holes 110 of the lower bracket 200 in advance according to the requirement of the battery module, so that the serial-parallel connection between the battery cells 300 is realized.

As shown in fig. 3, a schematic diagram of a sampling plate 400 according to the present utility model is shown, a plurality of pole contact spring plates 600 are disposed on the lower surface of the sampling plate 400, and the number and positions of the pole contact spring plates 600 are consistent with those of the cell limiting holes 110, and the number is equal to that of the cells 300. As shown in fig. 4, which is an enlarged view of the portion a of fig. 3, a pole contact spring 600 is welded to the opposite surface of the sampling plate 400 in accordance with the present utility model. Referring to fig. 1, the pins 610 of the pole contact spring 600 pass through the sampling plate 400, and wires are designed on the upper surface of the sampling plate 400 according to the requirements of the battery module, and are connected with the connector 500, and are connected with the BMS through the connector 500. The connection mode can not only omit the use of sampling wires, but also can realize series-parallel connection between the battery cells 300 by combining the battery cell connection metal sheets arranged in the battery cell limiting holes 110 of the lower bracket 200.

As shown in fig. 5, the pole contact spring 600 according to the present utility model is shown in a schematic view, wherein the pole contact spring 600 is unfolded to be a cross-shaped metal sheet, and four pins 610 are provided, each pin 610 is bent to have a U-shaped structure with a consistent size and direction, the bending direction is perpendicular to the surface of the metal sheet, and the height of the middle position of the pole contact spring 600 is at the middle position of the U-shaped structure. The cross-shaped metal sheet and the four pins 610 are only described and illustrated in fig. 5, and the number of the pins 610 is not limited to four.

As shown in fig. 6, when the sampling plate 400 is mounted, the pole contact spring 600 on the lower surface of the sampling plate 400 is just in elastic contact with the cell electrode, and the pole contact spring 600 is in a compressed state, so as to ensure that the pole contact spring 600 is not disconnected from the cell electrode.

As shown in fig. 7, the routing diagram of the sample board 400 of the single-sided connector 500 according to the present utility model is shown in a conventional routing manner, and the battery modules are different from each other in AB groups during design, so that when a plurality of battery modules are assembled, it is necessary to route from two sides. As shown in fig. 8, the two-sided connector 500 according to the present utility model is a schematic wiring diagram of the sample board 400, and since the connectors 500 are disposed at both ends of the sample board 400, the two-sided connector can be wired from the same side when the AB battery modules are assembled. Compared with the single-side outlet connector 500, the double-side outlet connector 500 has the advantages of shorter required wire harness size, smaller internal resistance, higher sampling precision and more convenient arrangement.

The utility model is further illustrated by the following description of the assembly process of the spring contact type sampling structure.

A) According to the design requirement of the battery module, the required number of battery cells 300 are placed in the battery cell limiting holes 110 of the lower bracket 200 according to the corresponding positive and negative electrode sequence;

b) Aligning the upper bracket 100, ensuring that the battery cell limiting holes 110 of the upper bracket 100 are aligned with the battery cells 300, and pressing to align and clamp the connecting bayonets;

c) The electrode post contact spring 600 and the sampling plate 400 of the connector 500 are mounted on the upper bracket 100, the electrode post contact spring 600 faces downwards to be aligned with the position of the battery cell electrode, and the sampling plate 400 is fixed by tightening a fixing screw.

In summary, the elastic contact type sampling structure has the following beneficial effects:

(1) By adopting the pole contact spring pieces 600, the pole contact spring pieces 600 are welded on the sampling plate 400, the position of each pole contact spring piece 600 corresponds to the position of the cell electrode, and welding is replaced by contact between the pole contact spring pieces 600 and the cell electrode, so that the direct connection of the sampling line and the cell 300 is avoided.

(2) Through wiring on the sampling plate 400, the serial-parallel connection between the battery cells 300 can be realized by combining the battery cell connection metal sheets arranged in the battery cell limiting holes 110 of the lower bracket 200.

(3) The cell electrode and the pole contact spring 600 are in non-fixed connection, so that the maintenance and replacement of the later cell 300 are more convenient.

(4) The left and right ends of the upper surface of the sampling plate 400 are respectively provided with a connector 500, and compared with the single-side connector 500, the double-side connector 500 has the advantages that the required wire harness size is shorter, the internal resistance is smaller, the sampling precision is higher, and the wire harness arrangement is more convenient.

The effects of the present utility model are not limited to the effects described above, and those skilled in the art can obtain effects not described above from the above description.

The above-described embodiments of an elastic contact sampling structure are merely illustrative of preferred embodiments, and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present utility model should be included in the scope of the present utility model. In addition, the technical schemes can be mutually combined, but the technical scheme is necessary to be based on the realization of the technical scheme by one of ordinary skill in the art; when the combination of the technical solutions is contradictory or impossible to realize, it should be considered that the combination of the technical solutions does not exist and is not within the scope of protection claimed by the present utility model.

Claims

1. The utility model provides an elastic contact point type sampling structure, includes the electric core support, the electric core install in the electric core support, its characterized in that, be provided with the sampling board on the electric core support, the welding has the utmost point post contact shell fragment on the sampling board, utmost point post contact shell fragment is the same with electric core number and welds in the one side that the sampling board is close to the electric core.

2. The elastic contact sampling structure according to claim 1, wherein the cell support comprises an upper support, a lower support and a cell support, cell limiting holes are formed in the positions, corresponding to each other, of the upper support and the lower support, the cell support is divided into two sections, the two sections are respectively arranged in the positions, corresponding to the upper support and the lower support, of the upper support and the lower support, and the upper support and the lower support are detachably spliced through connecting buckles and supported through the cell support.

3. The spring contact sampling structure of claim 2, wherein the cell limiting hole is a through hole with a step, and the cell electrode is aligned with the through hole.

4. The elastic contact sampling structure according to claim 1, wherein the pole contact spring is a metal sheet with a plurality of pins, and the pins are all in the same U-shaped elastic bending structure along the direction perpendicular to the surface of the metal sheet.

5. The spring contact sampling structure according to claim 1, wherein the sampling plate is further provided with two connectors, and the connectors are arranged at two ends of the long side of the sampling plate and are positioned at the opposite side of the face where the pole contact spring piece is positioned.