CN215816306U

CN215816306U - Signal acquisition device

Info

Publication number: CN215816306U
Application number: CN202121780412.3U
Authority: CN
Inventors: 欧鹏杰; 党奎
Original assignee: Eve Energy Co Ltd; Hubei Eve Power Co Ltd
Current assignee: Eve Energy Co Ltd; Hubei Eve Power Co Ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-02-11
Anticipated expiration: 2031-08-02

Abstract

The utility model belongs to the technical field of batteries and discloses a signal acquisition device. The signal acquisition device comprises an acquisition line, an upper clamping plate, a lower clamping plate and a plurality of aluminum rows, wherein the acquisition line comprises a plurality of signal acquisition branch lines and is used for acquiring signals of a plurality of electric core units in a battery module, each aluminum row is fixedly connected with one signal acquisition branch line, each aluminum row is used for connecting two adjacent electric core units in series, the acquisition line and the plurality of aluminum rows are arranged between the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are fixed in a hot-pressing compounding mode. The stability of connection between the signal acquisition branch line and the battery cell unit can be improved, the assembly flow of a production line is simplified, the assembly efficiency is improved, and the automatic assembly is convenient to realize; when the battery core is repaired and replaced after sale, the signal acquisition device can be quickly disassembled and reused, and the difficulty and cost of after sale maintenance are reduced; the short circuit caused by the fact that the collecting line is scratched is avoided, the process is simple, and the production cost is effectively reduced.

Description

Signal acquisition device

Technical Field

The utility model relates to the technical field of batteries, in particular to a signal acquisition device.

Background

At present, most manufacturers of battery systems mainly use four signal acquisition modes, namely, FPC acquisition, PCB acquisition, FFC acquisition and harness acquisition. Among the four battery signal acquisition modes, the FPC acquisition, the PCB acquisition and the FFC acquisition belong to acquisition modes aiming at specific requirements, and have the disadvantages of poor applicability, wide harness acquisition application and strong applicability. The pencil collection mode is connected through collection terminal and electric core connecting piece and is gathered the signal, when the assembly, need be connected electric core connecting piece and electric core unit one-to-one earlier, will have the pencil of gathering the terminal and correspond with each electric core connecting piece again and be connected, fixes the pencil at last, and assembly process is more, and assembly efficiency is lower. The assembled wire harness is exposed outside and is easy to scratch after contacting with a sharp object, thereby causing short circuit. Moreover, if the battery cell breaks down and needs to be replaced, the whole wiring harness acquisition module must be disassembled, the disassembling process is various, so that the disassembling is difficult, the disassembled wiring harness acquisition device cannot be reused, waste is caused, and the after-sale maintenance cost is increased. Therefore, how to improve the convenience and speed of the production line installation of the wire harness acquisition device, reduce the risk of the short circuit of the wire harness, and reduce the production and after-sale maintenance costs of the wire harness acquisition device is the technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a signal acquisition device, which can simplify the installation procedure of a signal acquisition device production line, reduce the risk of wire harness damage and reduce the difficulty and cost of after-sale maintenance.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a signal acquisition device comprising:

the acquisition line comprises a plurality of signal acquisition branch lines, and the signal acquisition branch lines can acquire signals of a plurality of battery cell units of the battery module;

each aluminum bar is fixedly connected with one signal acquisition branch line, and each aluminum bar is used for connecting two adjacent electric core units in series;

the collecting line and the aluminum rows are arranged between the upper clamping plate and the lower clamping plate.

Preferably, the upper clamping plate and the lower clamping plate are made of PC films and fixed through hot-pressing compounding.

Preferably, a groove is formed in one side, close to the cell unit, of the aluminum bar, connecting plates are formed on two sides of the groove, and the connecting plates are connected with the cell unit.

Preferably, the connecting plate is provided with a connecting hole, and the positive electrode or the negative electrode of the battery cell unit penetrates through the connecting hole to be connected with the aluminum bar.

Preferably, the upper clamping plate and the lower clamping plate are respectively provided with a matching connecting hole, and the matching connecting holes correspond to the connecting holes in the connecting plate one to one.

Preferably, the aluminum rows are sequentially arranged to form a first connecting row group and a second connecting row group which are arranged in parallel, and the collecting line is arranged between the first connecting row group and the second connecting row group.

Preferably, the signal collecting branch line comprises a voltage collecting branch line, and the voltage collecting branch line is connected with the aluminum row by spot welding.

Preferably, a gap is arranged between adjacent aluminum rows.

Preferably, the signal acquisition branch line further includes at least two temperature acquisition branch lines, the signal acquisition device further includes at least one thermistor, the two temperature acquisition branch lines are respectively connected with two terminals of the thermistor, and the thermistor is attached to the aluminum row.

Preferably, the battery management system further comprises a socket end, one end of each of the signal acquisition branch lines, which is far away from the aluminum bar, is connected to the socket end, and the socket end is used for connecting the battery management system.

The utility model has the beneficial effects that:

one end of each signal acquisition branch line of the acquisition line is correspondingly connected with each aluminum row, so that each aluminum row and the acquisition line are combined into a whole, and a connecting hole is formed in a connecting plate of each aluminum row; in addition, after long-time use, the conventional fastening connection mode is easy to cause the situation of torsion attenuation of the fastener, so that a connection gap is generated between the signal acquisition branch line and the cell unit connecting piece, and a large contact resistance is generated between the signal acquisition branch line and the cell unit connecting piece, so that a large voltage drop is generated, and adverse effects are caused on the battery signal acquisition precision. Compared with a fastening connection mode, the mode that the connection holes are connected with the battery cell units in the battery module is adopted, so that the stable connection of each signal acquisition branch circuit and each battery cell unit can be ensured, and the contact resistance between each signal acquisition branch circuit and each battery cell unit is effectively reduced, so that the accuracy of battery signal acquisition is ensured, and the reliability of signal acquisition of the battery module is greatly improved;

the connected acquisition line and the aluminum bar are arranged between the upper clamping plate and the lower clamping plate, and the aluminum bar and the acquisition line are wrapped by the upper clamping plate and the lower clamping plate through the hot pressing process to form a whole, so that the exposure of the assembled acquisition line can be avoided, the upper clamping plate and the lower clamping plate can protect the acquisition line, the acquisition line is prevented from being scratched, the short circuit of the acquisition line is avoided, the process is simple, and the production cost of the signal acquisition device is effectively reduced;

through linking together collection line and aluminium row to wrap up collection line and aluminium row with punch holder and lower plate, form signal acquisition device, when battery system needs after-sale maintenance to change electric core, can dismantle whole signal acquisition device comparatively easily, and the signal acquisition device after dismantling can used repeatedly, has reduced the degree of difficulty of disassembling of after-sale maintenance to and the cost of after-sale maintenance.

Drawings

FIG. 1 is a schematic diagram of the signal acquisition device of the present invention;

FIG. 2 is a schematic view of the aluminum row structure of the signal acquisition device of the present invention;

fig. 3 is an assembly view of the signal acquisition device of the present invention.

In the figure:

1. collecting a line; 2. aluminum bars; 21. a groove; 22. a connecting plate; 23. connecting holes; 3. an upper splint; 31. matching with the connecting hole; 4. a lower splint; 5. a socket end.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

At present, the battery signal acquisition modes of the battery module are more in wire harness acquisition, the wire harness acquisition applicability is stronger, and the application range is wider. The connection mode of the signal acquisition branch circuit and the battery cell unit in the wire harness acquisition mode is generally a fastening connection mode and a welding mode, and for the fastening connection mode, after long-time use, a fastener is easy to have the condition of torsion attenuation, so that a connection gap is generated between the signal acquisition branch circuit and the battery cell unit, and therefore a larger contact resistance is generated between the signal acquisition branch circuit and the battery cell unit, and a larger voltage drop is generated, and the larger voltage drop can influence the accuracy of battery signal acquisition; for the welding mode, the welding process is complex, the requirement on the technical level of workers is high, the signal acquisition branch circuit needs to be fixed by means of a large number of positioning tools, the assembly efficiency is extremely low, in addition, when the battery cell unit in the battery system is maintained and replaced, the whole wire harness acquisition device needs to be disassembled, the wire harness acquisition device which is difficult to disassemble and disassembled cannot be reused, and the maintenance cost is increased.

In an embodiment of the utility model, a signal acquisition device is provided, wherein one end of a signal acquisition branch line is connected with an aluminum bar, so that each aluminum bar and an acquisition line are combined into a whole, then a connecting hole is formed in each aluminum bar, and during assembly, only the assembly of the acquisition line and the aluminum bar is connected with a battery cell unit through the connecting hole, so that the assembly efficiency of a production line can be improved, the stable connection between the signal acquisition branch line and the battery cell can be ensured, and the reliability of battery signal acquisition is improved; the combined collecting line and the aluminum row are wrapped by the upper clamping plate and the lower clamping plate, so that the influence of an external sharp object on the collecting line can be avoided, the short circuit of the collecting line is prevented from being scratched, the process is simple, and the production cost is low; through forming signal acquisition device with collection line, aluminium row, punch holder and lower splint are put together, can conveniently dismantle, when carrying out after sales maintenance and changing electric core, can realize signal acquisition device's quick dismantlement and installation, and the signal acquisition device after the dismantlement can used repeatedly, reduces after sales maintenance's the degree of difficulty and cost.

As shown in fig. 1, the signal acquisition device includes an acquisition line 1, an upper clamp plate 3, a lower clamp plate 4 and a plurality of aluminum rows 2, wherein the acquisition line 1 includes a plurality of signal acquisition branch lines, and the signal acquisition branch lines are used for acquiring signals of a battery cell unit in a battery module; each aluminum bar 2 is connected with one signal acquisition branch circuit, adjacent cell units are connected in series through the aluminum bars 2, and the signal acquisition branch circuits and the cell units are connected through the aluminum bars 2, so that the connection stability of the signal acquisition branch circuits and the cell units is improved, and the signal acquisition reliability of the battery is ensured; the combined acquisition line 1 and the aluminum row 2 are arranged between the upper splint 3 and the lower splint 4, and then the upper splint 3 and the lower splint 4 are fixed together by adopting a hot pressing process, so that the signal acquisition device consisting of the upper splint 3, the acquisition line 1, the aluminum row 2 and the lower splint 4 is manufactured. Through the parcel of punch holder 3 and lower plate 4, can avoid gathering line 1 to expose outside, prevent that gathering line 1 from being lacerated and leading to the short circuit, improve the reliability of signal acquisition device work, and simple process has effectively reduced signal acquisition device's manufacturing cost. With collection line 1 and 2 fixed connection of aluminium row and externally parcel punch holder 3 and lower plate 4, made things convenient for signal acquisition device's assembly and dismantlement greatly, when the battery electricity core was changed in the after-sale maintenance, signal acquisition device can dismantle fast and can used repeatedly, has reduced the degree of difficulty and the cost of after-sale maintenance.

Further, as shown in fig. 2, a groove 21 is formed in the aluminum bar 2, and a recessed side of the groove 21 is close to the cell units, because the aluminum bar 2 connects two adjacent cell units together, the groove 21 can increase contact between the adjacent cell units and air, thereby facilitating heat dissipation of the cell units, and a small height difference may exist between the cell units due to process reasons, and the groove 21 can eliminate stress caused by the height difference between the cell units, so that the cell works more reliably; be formed with connecting plate 22 in the both sides of recess 21, spot weld signal acquisition branch circuit on connecting plate 22, because connecting plate 22 has certain area, consequently the staff is when welding, the operational working face is great, can effectively reduce staff's error rate, the welded degree of difficulty has also been reduced simultaneously, take the mode of spot welding, can guarantee the accuracy of gathering the point, can improve welded efficiency, can reduce the welding cost simultaneously, in an embodiment, can adopt ultrasonic bonding's mode welding together between signal acquisition branch circuit and the aluminium bar 2.

Preferably, in an embodiment, a connection hole 23 may be formed in the connection plate 22, the size of the connection hole 23 is designed according to the size of the positive electrode and the size of the negative electrode of the battery cell unit to be connected, the connection hole 23 is divided into a positive connection hole and a negative connection hole, the positive connection hole is used for being connected with the positive electrode of the battery cell unit, the negative connection hole is used for being connected with the negative electrode of the battery cell unit, during assembly, the positive electrode of the previous battery cell unit and the negative electrode of the next battery cell unit are connected through the positive connection hole and the negative connection hole on the same aluminum bar 2 to realize series connection, and so on, the battery cell units are sequentially connected in series; thereby realize being connected of signal acquisition branch circuit and electric core unit, improve the steadiness that signal acquisition branch circuit and electric core unit are connected greatly, guarantee that aluminium bar 2 and electric core unit can abundant contact, further reduce the contact resistance between signal acquisition branch circuit and the electric core unit, can guarantee the precision of battery signal acquisition, further improve the reliability of carrying out battery signal acquisition to the battery module, and this kind of connected mode dismantles conveniently, can simplify the flow of producing the line assembly, improve the efficiency of producing the line assembly, in an embodiment, signal acquisition device and electric core unit can adopt the mode of automatic assembly to assemble, and the assembly efficiency is improved, and the labor cost is reduced.

As a preferred technical solution, in an embodiment, a plurality of aluminum rows 2 may be sequentially arranged and arranged in parallel on two sides of the acquisition line 1 to form a first connection row group and a second connection row group, so that the arrangement may effectively simplify the connection layout between the signal acquisition branch line and the aluminum rows 2, and make the structure of the signal acquisition device more compact and more beautiful.

Further, when assembling, certain clearance will be left between the adjacent aluminium row 2, because adjacent aluminium row 2 is connected is same electric core unit, has certain distance between the positive pole and the negative pole of electric core unit, sets up the clearance between adjacent aluminium row 2, is because the structural design of electric core unit on the one hand, and on the other hand can play radiating effect, and can be suitable like this reduce the size of aluminium row 2, reduce cost.

Further, in an embodiment, the signal collection branch lines include a plurality of voltage collection branch lines, the collection ends of the voltage collection branch lines and the connecting plate 22 of the aluminum bar 2 are spot-welded together in an ultrasonic welding mode, the accuracy of the collection points can be guaranteed in this mode, the aluminum bar 2 is used as a bridge beam connected between the voltage collection branch lines and the battery cell units, it can be guaranteed that each voltage collection branch line is stably connected with the battery cell units, the collection precision of the voltage signals of the battery is effectively guaranteed, and the reliability of battery signal collection of the battery module is further improved.

Further, in an embodiment, the signal collecting branch line further includes at least two temperature collecting branch lines and at least one thermistor, the two temperature collecting branch lines are respectively connected with two terminals of the thermistor, and the thermistor is attached to the aluminum row 2, so that the temperature collecting branch lines and the thermistor can be effectively fixed, and therefore the temperature collection of the aluminum row 2 can be stably performed, namely, the temperature data of the battery module can be obtained, and the reliability of battery signal collection of the battery module is further improved. In other embodiments, a plurality of thermistors may be provided, and accordingly, each thermistor is connected to two temperature acquisition branch lines, and the plurality of thermistors are used to acquire temperature data of the plurality of aluminum rows 2, so as to further improve the accuracy of temperature signal acquisition of the battery signal acquisition device.

Further, as shown in fig. 3, the collection line 1 and the aluminum row 2 assembled together are wrapped by an upper clamp plate 3 and a lower clamp plate 4 in a hot-pressing compounding manner, during specific production, the installation position of the aluminum row 2 is uniformly carved on the lower clamp plate 4 to facilitate workers to install the aluminum row 2, so that streamlined production is facilitated, then the aluminum row 2 and the lower clamp plate 4 are fixedly connected together by a hot-pressing process, each signal collection branch line and a connecting plate 22 on the aluminum row 2 are connected together in a spot welding manner, then the upper clamp plate 3 is positioned to enable the upper clamp plate 3 to be opposite to the lower clamp plate 4, the collection line 1 and the aluminum row 2 are positioned between the upper clamp plate 3 and the lower clamp plate 4, then the upper clamp plate 3 and the lower clamp plate 4 are compounded together by the hot-pressing process, so that the collection line 1 and the aluminum row 2 are wrapped between the upper clamp plate 3 and the lower clamp plate 4, and the collection line 1 is prevented from being exposed, prevent that collection line 1 from being scratched by sharp-pointed object and the short circuit, improve the reliability of signal acquisition device work to adopt upper plate 3 and lower plate 4 to arrange the technology of 2 and collection line 1 parcel with aluminium through the hot pressing complex mode comparatively simple, the cost of manufacture is low.

Further, the upper clamping plate 3 and the lower clamping plate 4 are provided with matching connecting holes 31 at positions corresponding to the connecting holes 23 on the aluminum bar 2, and the aluminum bar 2 is connected with the cell units through the matching connecting holes 31 and the connecting holes 23.

Preferably, the positive connecting hole 23 on the aluminum bar 2 at one end of the signal acquisition device extends from the edges of the upper clamp plate 3 and the lower clamp plate 4 to form a positive pin, the positive pin is used for being connected with the positive electrode of the battery module, the negative connecting hole 23 on the aluminum bar 2 at the other end of the signal acquisition device extends from the edges of the upper clamp plate 3 and the lower clamp plate 4 to form a negative pin, and the negative pin is used for being connected with the negative electrode of the battery module.

Preferably, the upper clamping plate 3 and the lower clamping plate 4 can be made of PC films, the PC films have good impact resistance and are not easy to damage, and the PC films have good heat resistance and low temperature resistance, stable mechanical properties in a wide temperature range and are not easy to be influenced by external temperature; the PC film also has good insulating property, avoids the influence of other elements on the acquisition line 1, has strong plasticity and low price, and can reduce the manufacturing cost of the signal acquisition device.

Further, with reference to fig. 1, the signal acquisition device further includes a socket end 5, one end of the signal acquisition branch line, which is far away from the aluminum bar 2, is connected to the socket end 5, the socket end 5 is used for connecting a battery management system, and the socket end 5 transmits the acquired battery signal in the battery module to the battery management system, so that the battery management system collects, analyzes and monitors the battery signal.

Preferably, as shown in fig. 3, the distance between the socket end 5 of the assembled signal acquisition device and the side wall of the adjacent upper clamping plate 3 and lower clamping plate 4 is 2cm-3cm, and may be, for example, 2cm, 2.5cm, 3cm, etc., when the signal acquisition device is installed, due to the position of the battery system, the position of the socket end 5 needs to be adjusted, a certain distance is left between the socket end 5 and the side wall of the adjacent upper clamping plate 3 and lower clamping plate 4, and the angle of the socket end 5 can be conveniently adjusted to adapt to the assembly with the battery system.

According to the utility model, the plurality of signal acquisition branch circuits on the acquisition line 1 are correspondingly connected with the aluminum bar 2, then the aluminum bar 2 is provided with the connecting hole 23, and the signal acquisition branch circuits are connected with the battery cell unit through the connecting hole 23, so that the connection between the signal acquisition branch circuits and the battery cell unit is more stable, and the contact resistance between the signal acquisition branch circuits and the battery cell unit is reduced, thereby improving the reliability of battery signal acquisition. When the battery cell is replaced in after-sale maintenance, the signal acquisition device can be quickly detached and reused, and the difficulty and cost of after-sale maintenance are reduced.

Adopt punch holder 3 and lower plate 4 to wrap up collection line 1 and aluminium row 2 through hot pressing technology, can avoid collection line 1 to expose outside, prevent that collection line 1 from being scratched the short circuit, improve signal acquisition device's operational reliability, and simple process can effectively reduce signal acquisition device's manufacturing cost.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A signal acquisition device, comprising:

the battery module comprises an acquisition line (1), wherein the acquisition line (1) comprises a plurality of signal acquisition branch lines, and the plurality of signal acquisition branch lines can acquire signals of a plurality of battery cell units of the battery module;

each aluminum row (2) is fixedly connected with one signal acquisition branch line, and each aluminum row (2) is used for connecting two adjacent electric core units in series;

the aluminum collector comprises an upper clamping plate (3) and a lower clamping plate (4), wherein the collecting line (1) and the aluminum rows (2) are arranged between the upper clamping plate (3) and the lower clamping plate (4).

2. The signal acquisition device according to claim 1, wherein the material of the upper splint (3) and the lower splint (4) is a PC film, and the upper splint (3) and the lower splint (4) are fixed by thermocompression bonding.

3. The signal acquisition device according to claim 1, wherein a groove (21) is formed in one side of the aluminum row (2) close to the cell unit, connecting plates (22) are formed on two sides of the groove (21), and the connecting plates (22) are connected with the cell unit.

4. The signal acquisition device according to claim 3, wherein the connecting plate (22) is provided with a connecting hole (23), and the positive pole or the negative pole of the battery cell unit passes through the connecting hole (23) to be connected with the aluminum row (2).

5. The signal acquisition device according to claim 4, wherein the upper clamping plate (3) and the lower clamping plate (4) are respectively provided with a matching connecting hole (31), and the matching connecting holes (31) are in one-to-one correspondence with the connecting holes (23) on the connecting plate (22).

6. The signal acquisition device according to any one of claims 1 to 5, wherein a plurality of the aluminum rows (2) are sequentially arranged to form a first connection row group and a second connection row group which are arranged in parallel, and the acquisition line (1) is arranged between the first connection row group and the second connection row group.

7. The signal acquisition device according to claim 1, wherein the signal acquisition branch line comprises a voltage acquisition branch line, and the voltage acquisition branch line is connected with the aluminum row (2) by means of spot welding.

8. The signal acquisition device according to claim 1, wherein a gap is provided between adjacent aluminum rows (2).

9. The signal acquisition device according to claim 1, wherein the signal acquisition branch line further comprises at least two temperature acquisition branch lines, the signal acquisition device further comprises at least one thermistor, the two temperature acquisition branch lines are respectively connected with two terminals of the thermistor, and the thermistor is attached to the aluminum row (2).

10. The signal acquisition device according to claim 1, further comprising a socket end (5), wherein one end of the plurality of signal acquisition branch lines, which is far away from the aluminum row (2), is connected to the socket end (5), and the socket end (5) is used for connecting a battery management system.