CN218731672U

CN218731672U - Collection assembly and battery module

Info

Publication number: CN218731672U
Application number: CN202222885001.1U
Authority: CN
Inventors: 林道钟
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-24
Anticipated expiration: 2032-10-31
Also published as: WO2024093009A1

Abstract

The utility model relates to a power battery technical field discloses a gather subassembly and battery module. The collection assembly comprises an insulating piece, a bus bar, a collection wire harness and a connecting module. The bus bar is arranged on the insulating piece; the collecting wire harness is provided with a composite collecting end, a voltage collecting end and an output end, the voltage collecting end is electrically connected with the busbar, and the output end is connected with a connector; the connecting module comprises a collecting circuit board, a temperature collecting piece and a voltage collecting piece, wherein the voltage collecting piece and the temperature collecting piece are arranged in an insulating mode, the composite collecting end is electrically connected to the collecting circuit board, the temperature collecting piece is arranged on the collecting circuit board and is electrically connected with the collecting circuit board, one end of the voltage collecting piece is electrically connected with the collecting circuit board, and the other end of the voltage collecting piece is electrically connected with the busbar. The utility model discloses a only need once be connected between link module and the busbar, simplify the assembly process of gathering the subassembly, improve production efficiency, reduction in production cost, simultaneously, improve the durable degree and the practicality of gathering the subassembly.

Description

Collection assembly and battery module

Technical Field

The utility model relates to a power battery technical field especially relates to a gather subassembly and battery module.

Background

All be provided with the collection subassembly in the battery module, the temperature and the voltage that the collection subassembly is used for gathering battery cell guarantee the safety in utilization of battery module. The collecting assembly generally includes an insulating support, a collecting line and a bus bar, wherein the bus bar is fixed on the insulating support, and the bus bar is connected with the poles of the single batteries and is used for connecting the single batteries in series. In the prior art, the collection line has a voltage collection end for collecting voltage and a temperature collection end for collecting temperature. For the busbar that needs simultaneous measurement voltage and temperature, need be connected with voltage acquisition end and temperature acquisition end simultaneously on the busbar, need carry out twice and connect, be unfavorable for simplifying the assembly process who gathers the subassembly, reduce production efficiency, improve manufacturing cost.

Accordingly, there is a need for a collecting assembly and a battery module for solving the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a collection subassembly and battery module to only need once to be connected between messenger's link module and the busbar, simplify the assembly process of collection subassembly, improve production efficiency, reduction in production cost, simultaneously, improve the durable degree and the practicality of collection subassembly.

To achieve the purpose, the utility model adopts the following technical proposal:

a collection assembly comprising:

an insulating member;

the bus bar is arranged on the insulating part and is used for being electrically connected with the pole of the single battery;

the collecting wire harness is provided with a composite collecting end, a voltage collecting end and an output end, the voltage collecting end is electrically connected with the busbar, and the output end is connected with a connector;

the connecting module comprises a collecting circuit board, a temperature collecting piece and a voltage collecting piece, wherein the voltage collecting piece and the temperature collecting piece are arranged in an insulating mode, the composite collecting end is electrically connected to the collecting circuit board, the temperature collecting piece is arranged on the collecting circuit board and electrically connected with the collecting circuit board, one end of the voltage collecting piece is electrically connected with the collecting circuit board, and the other end of the voltage collecting piece is electrically connected with the busbar.

As an optional technical scheme of the collection assembly, a notch is formed in one end, connected with the collection circuit board, of the voltage collection piece, the notch is perpendicular to the direction of the collection circuit board and penetrates through the voltage collection piece, the voltage collection piece is back on the back of the collection circuit board, a coating portion is arranged on one side of the notch in a protruding mode, the tail end of the coating portion faces towards the notch, and the temperature collection piece is arranged in the notch.

As an optional technical scheme of the acquisition assembly, a filling space is enclosed among the coating part, the gap wall of the gap and the acquisition circuit board, and the filling space is filled with insulating heat-conducting glue.

As an optional technical scheme of the acquisition assembly, the acquisition assembly further comprises a connecting circuit board, the connecting circuit board is fixedly arranged on the insulating part, a fuse is arranged on the connecting circuit board, the acquisition wiring harness and the connector are connected to the connecting circuit board, and the acquisition wiring harness and the connector are electrically connected through the fuse.

As an optional technical scheme of the acquisition assembly, an insulation buffer layer is arranged between the connecting circuit board and the insulation piece;

and/or the collection assembly further comprises a protective member, the protective member is arranged on the connecting circuit board, and the joint between the collection wiring harness and the connecting circuit board is positioned in the protective member.

As an optional technical scheme of the acquisition assembly, the acquisition circuit board is fixedly arranged on the insulating part, and an insulating buffer layer is arranged between the acquisition circuit board and the insulating part.

As the optional technical scheme who gathers the subassembly, the busbar includes main part and connecting portion, the main part with utmost point post electricity is connected, connecting portion connect in the edge of main part, connecting portion connect in voltage acquisition end or voltage acquisition spare.

As an optional technical scheme of the collection assembly, a first accommodating groove and a second accommodating groove are formed in the insulating piece, the depth of the first accommodating groove is smaller than that of the second accommodating groove, the main body is arranged in the first accommodating groove, the connecting portion is arranged in the second accommodating groove, and the end portion of the connecting portion faces the main body, is bent and is connected with the main body.

As an optional technical scheme of the collection assembly, an accommodating groove is formed in the insulating part, a stopping portion is convexly arranged on a groove side wall of the accommodating groove, the bus bar is arranged in the accommodating groove, the stopping portion is located on one side, facing the accommodating groove opening, of the bus bar, and the stopping portion is used for stopping the bus bar.

The battery module comprises a single battery and the acquisition assembly, wherein the bus bar is electrically connected with the pole of the single battery.

The utility model has the advantages that:

the utility model provides a collection assembly, it includes insulator, busbar, collection pencil and linking module. For the busbar needing to measure voltage and temperature simultaneously, the composite acquisition end can be directly connected with the busbar through the connecting module, the voltage acquisition part is used for acquiring voltage, the temperature of the busbar is transmitted to the temperature acquisition part through the voltage acquisition part and the acquisition circuit board, the temperature acquisition of the temperature acquisition part is realized, the connecting module and the busbar are connected only once, the assembly process of the acquisition assembly is simplified, the improvement of production efficiency is facilitated, the production cost is reduced, and the connecting structure between the acquisition wire harness and the busbar is simplified; in addition, utilize the collection circuit board to gather voltage collection piece and temperature collection piece integrated for a whole, improved the modularization degree of connection module structure, the connection module of being convenient for is connected with compound collection end, and simultaneously, the hardness of collection circuit board is higher, has improved the durable degree and the practicality of collection subassembly, has reduced the maintenance cost.

The utility model provides a battery module, it includes above-mentioned collection subassembly. For the bus bar needing to measure voltage and temperature simultaneously, the connection module and the bus bar only need to be connected once, so that the assembly process of the battery module is simplified, the production efficiency is improved, and the production cost is reduced; in addition, the collection assembly is high in durability and practicability, and the maintenance cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an acquisition assembly provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

fig. 5 is a bottom view of a collection assembly provided by an embodiment of the present invention;

fig. 6 is a side view of a collection assembly according to an embodiment of the present invention.

In the figure:

1. an insulating member; 11. accommodating a tank; 111. a first accommodating groove; 112. a second accommodating groove; 12. a stopper portion; 13. avoiding holes; 14. a through hole; 15. a square hole;

2. a bus bar; 2a, a serial bus; 2b, an output bus; 21. a main body; 22. a connecting portion; 221. a switching part;

3. collecting a wire harness; 31. a composite acquisition end; 32. a voltage acquisition end; 4. a connector;

5. a connection module; 51. collecting a circuit board; 52. a temperature acquisition member; 53. a voltage acquisition element; 531. a notch; 532. a covering part;

6. connecting the circuit board; 7. a protective member; 8. a nickel sheet.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

The embodiment provides a battery module. Specifically, the battery module includes battery cell and collection subassembly, and battery cell series connection gathers the subassembly and is used for gathering battery cell's temperature and voltage.

The embodiment also provides an acquisition assembly. Specifically, as shown in fig. 1 to 6, the collecting assembly includes an insulator 1, a bus bar 2, a collecting wire harness 3, and a connection module 5. The bus bar 2 is arranged on the insulating part 1 and is used for being electrically connected with the pole of the single battery; the collection wire harness 3 is provided with a composite collection end 31, a voltage collection end 32 and an output end, wherein the voltage collection end 32 is electrically connected with the busbar 2, and the output end is connected with the connector 4; the connecting module 5 comprises a collecting circuit board 51, a temperature collecting piece 52 and a voltage collecting piece 53, the composite collecting end 31 is electrically connected to the collecting circuit board 51, the temperature collecting piece 52 is arranged on the collecting circuit board 51 and is electrically connected with the collecting circuit board 51, one end of the voltage collecting piece 53 is electrically connected with the collecting circuit board 51, the other end of the voltage collecting piece 53 is electrically connected to the bus bar 2, and the voltage collecting piece 53 and the temperature collecting piece 52 are arranged in an insulating mode.

The collection assembly provided by the embodiment comprises an insulating piece 1, a bus bar 2, a collection wire harness 3 and a connecting module 5. For the busbar 2 which needs to measure voltage and temperature simultaneously, the composite acquisition end 31 can be directly connected with the busbar 2 through the connection module 5, the voltage acquisition piece 53 is used for acquiring voltage, the temperature of the busbar 2 is transmitted to the temperature acquisition piece 52 through the voltage acquisition piece 53 and the acquisition circuit board 51, the temperature acquisition of the temperature acquisition piece 52 is realized, the connection module 5 and the busbar 2 only need to be connected once, the assembly process of the acquisition assembly is simplified, the production efficiency is improved, the production cost is reduced, and the connection structure between the acquisition wiring harness 3 and the busbar 2 is simplified; in addition, utilize collection circuit board 51 to gather piece 53 and temperature 52 integrated as a whole with the voltage, improved the modularization degree of connecting module 5 structure, the connecting module 5 of being convenient for is connected with compound collection end 31, and simultaneously, collection circuit board 51's hardness is higher, has improved the durable degree and the practicality of gathering the subassembly, has reduced the maintenance cost.

The battery module that this embodiment provided, it includes above-mentioned collection subassembly. For the bus bar 2 which needs to measure voltage and temperature simultaneously, the connecting module 5 and the bus bar 2 only need to be connected once, so that the assembly process of the battery module is simplified, the production efficiency is improved, and the production cost is reduced; in addition, the collection assembly is high in durability and practicability, and the maintenance cost is reduced.

In this embodiment, the collecting circuit board 51 is a PCB, a specific circuit on the collecting circuit board can realize the insulating arrangement of the voltage collecting part 53 and the temperature collecting part 52, and the voltage collecting part 53 and the temperature collecting part 52 are respectively electrically connected to the composite collecting terminal 31.

Specifically, the temperature collecting member 52 is an NTC thermistor, and the temperature collecting member 52 is surface-mounted on the collecting circuit board 51. The voltage collecting member 53 is a sheet and made of metal, preferably nickel.

It can be understood that the voltage collecting part 53 and the temperature collecting part 52 are both disposed on the same side of the collecting circuit board 51, which is convenient for shortening the distance between the voltage collecting part 53 and the temperature collecting part 52 and improving the accuracy of temperature data collection. Specifically, the voltage acquisition part 53 and the temperature acquisition part 52 are both positioned on one side of the acquisition circuit board 51 opposite to the insulation part 1, so that a slotted hole structure for avoiding the voltage acquisition part 53 and the temperature acquisition part 52 is avoided being formed in the insulation part 1, the processing process of the insulation part 1 is simplified, and the improvement of the production efficiency is facilitated.

Further, the collecting circuit board 51 is fixedly connected to the insulating member 1, and an insulating buffer layer is disposed between the collecting circuit board 51 and the insulating member 1. Because collection circuit board 51 is the PCB board, so collection circuit board 51 also probably is provided with the line of walking towards one side of insulating part 1, and the insulating buffer layer can avoid collection circuit board 51 towards the line of walking of insulating part 1 one side and insulating part 1 friction damage, has guaranteed the functional of collection subassembly, has improved the durability of collection subassembly.

In this embodiment, insulating buffer layer is the cotton double faced adhesive tape of bubble, when can playing insulating and cushioning effect, also can play the bonding effect, has avoided using other connection structure to connect between collection circuit board 51 and insulator 1, does benefit to the thickness size who reduces the collection subassembly, has reduced the space that the collection subassembly took inside the battery module, improves the practicality of collection subassembly.

Preferably, a notch 531 is formed at one end of the voltage acquisition part 53 connected with the acquisition circuit board 51, the notch 531 penetrates through the voltage acquisition part 53 in a direction perpendicular to the acquisition circuit board 51, a cladding part 532 is convexly arranged on one side of the voltage acquisition part 53 opposite to the acquisition circuit board 51, the cladding part 532 is located on one side of the notch 531, the tail end of the cladding part 532 bends towards the notch 531, and the temperature acquisition part 52 is arranged in the notch 531. Above-mentioned structural setting, cladding 532 can protect temperature acquisition piece 52, prevents that temperature acquisition piece 52 from being extruded, has improved the durability of gathering the subassembly, and with temperature acquisition piece 52 setting in breach 531 simultaneously, also further shorten the interval between voltage acquisition piece 53 and the temperature acquisition piece 52, improve the accuracy degree of temperature acquisition data.

In this embodiment, the covering portions 532 are disposed on opposite sides of the notch 531. The notch 531 penetrates the end of the voltage collector 53.

Further, a filling space is formed between the covering part 532 and the gap wall of the gap 531 and the collecting circuit board 51, and the filling space is filled with insulating heat-conducting glue, so that the temperature on the voltage collecting part 53 is transmitted to the temperature collecting part 52 through the insulating heat-conducting glue, the heat-conducting efficiency is improved, and the accuracy of temperature collecting data is further improved. The material of the insulating and heat-conducting adhesive can refer to the prior art, which is not the key point of protection in this embodiment and is not described herein again.

Specifically, the bus bar 2 includes a series bus bar 2a and an output bus bar 2b. In general, since a plurality of unit batteries are provided in each battery module, a plurality of serial bus bars 2a are provided, and the plurality of unit batteries are connected in series by the plurality of serial bus bars 2 a. The output bus bars 2b are provided with two, and the two output bus bars 2b are respectively arranged at two ends of the plurality of single batteries connected in series and used for supplying power to the outside of the battery module. The number of the bus bars 2 may be adaptively adjusted according to the number of the unit batteries in the battery module, and is not limited herein.

A plurality of unit cells are arranged along the length direction of the insulating member 1. Two utmost point posts of every battery cell all set up in battery cell towards one side of insulating part 1, and two utmost point posts of every battery cell set up along the width direction interval of insulating part 1, and two utmost point posts of two adjacent battery cells are just to setting up one by one for whole battery cell's utmost point post is arranged and is two sets of. In each group of the poles, the positive poles and the negative poles are alternately arranged. Therefore, the collection assembly comprises two sets of bus bars, each set of bus bars comprises at least one serial bus bar 2a and at least one output bus bar 2b, and the two sets of bus bars are respectively arranged corresponding to the two sets of poles.

Preferably, two collection wire harnesses 3 are provided, and the two collection wire harnesses 3 are respectively provided corresponding to the two sets of bus bar sets. Two connectors 4 are correspondingly provided. In this embodiment, the collecting harness 3 is an FFC (Flexible Flat Cable), and compared with a Cable, the FFC is thinner, which is beneficial to reducing the thickness of the collecting assembly. The collection strand 3 is bonded to the insulator 1 by a glue layer.

Specifically, two sets of through holes 14 have been seted up on insulating part 1, and two sets of through holes 14 are arranged along the width direction interval of insulating part 1, and two sets of through holes 14 correspond the setting with two sets of busbar groups respectively. Each set of through holes 14 comprises a plurality of through holes 14, and each pole column penetrates through one through hole 14 to be connected with the bus bar 2 in a welding mode.

Furthermore, the insulation member 1 is provided with a plurality of avoiding holes 13, the avoiding holes 13 are arranged along the length direction of the insulation member 1 at intervals, and the plurality of avoiding holes 13 and the explosion-proof valves of the plurality of single batteries are arranged in a one-to-one opposite mode, so that the safety of the battery module is ensured. Two collection pencil 3 set up respectively in the relative both sides of dodging hole 13, further avoid collection pencil 3 to shelter from dodging hole 13, further guarantee the security.

As preferred scheme, gather the subassembly and still include connecting circuit board 6, connecting circuit board 6 is fixed to be set up on insulating part 1, is provided with the fuse on the connecting circuit board 6, gathers pencil 3 and connector 4 and all connects in connecting circuit board 6, and gathers through the fuse electricity between pencil 3 and the connector 4 and be connected. Set up the fuse, can improve the security of gathering the subassembly to improve battery module's safety in utilization.

In this embodiment, the connection circuit board 6 is a PCB, and the specific circuit on the connection circuit board can be connected between the collection harness 3 and the connector 4 through a fuse, which is not a protection focus of this embodiment and is not limited in this embodiment.

In the present embodiment, the fuse is etched on the connection circuit board 6. In other embodiments, the fuse may be disposed on the connection circuit board 6 by means of a patch welding method, which is not limited herein.

Typically, the collection harness 3 is disposed on top of the connection circuit board 6. Preferably, connector 4 sets up in connecting circuit board 6 one side that is the back of the body in collection pencil 3, has seted up two square holes 15 on the insulator 1, and two connectors 4 wear to locate two square holes 15 respectively downwards, do benefit to the height that reduces battery module.

Preferably, be provided with the insulating buffer layer between connecting circuit board 6 and insulator 1, because connecting circuit board 6 is the PCB board, so connecting circuit board 6 also probably is provided with the line of walking towards one side of insulator 1, and the insulating buffer layer can avoid connecting circuit board 6 to rub with insulator 1 towards the line of walking of insulator 1 one side and damage, has guaranteed the functional of collection subassembly, has improved the durability of collection subassembly.

In this embodiment, be provided with the hot riveting post on the insulating part 1, the hot riveting post wears to locate connecting circuit board 6, and the top pressurized of hot riveting post is heated and is produced deformation, and the top area increases, realizes being connected between connecting circuit board 6 and the insulating part 1.

In this embodiment, the insulating buffer layer is the cotton double faced adhesive tape of bubble, when can playing insulating and cushioning effect, also can play the bonding effect, has further guaranteed the reliability of being connected between connecting circuit board 6 and insulator 1.

As the preferred scheme, gather the subassembly and still include protection piece 7, protection piece 7 is placed on connecting circuit board 6, and the junction between collection pencil 3 and the connecting circuit board 6 is located protection piece 7 for protection piece 7 can protect the junction between collection pencil 3 and the connecting circuit board 6, has improved the safety in utilization of gathering subassembly and battery module.

In this embodiment, the protection member 7 is in a cover shape, the protection member 7 is buckled at the joint between the collection harness 3 and the connection circuit board 6, the protection member 7 is provided with a glue injection hole, and the collection harness 3 can be exposed through the glue injection hole, so that whether the joint is in the protection member 7 or not can be observed conveniently. The glue injection hole is filled with insulating glue, so that the insulating protection effect is achieved.

As preferred scheme, seted up holding tank 11 on the insulating part 1, bus bar 2 does benefit to the thickness size that reduces the collection subassembly in arranging holding tank 11 in, has reduced the space that the collection subassembly took inside the battery module, improves the practicality of collection subassembly.

Specifically, the busbar 2 includes a main body 21 and a connecting portion 22, the main body 21 is electrically connected to the pole, the connecting portion 22 is connected to an edge of the main body 21, and the connecting portion 22 is connected to the voltage collecting terminal 32 or the voltage collecting member 53. Through the setting of connecting portion 22, can confirm voltage acquisition end 32 or voltage acquisition piece 53 and busbar 2's hookup location, be convenient for gather the production and processing of subassembly, do benefit to the manufacturing cost who reduces collection subassembly and battery module.

In the present embodiment, the connection portion 22 for connecting with the voltage collecting terminal 32 is provided with the nickel plate 8 by laser spot welding, and the voltage collecting terminal 32 is laser spot welded with the nickel plate 8. The voltage pickup member 53 is laser spot-welded to the connection portion 22.

The accommodating groove 11 includes a first accommodating groove 111 and a second accommodating groove 112, a depth of the first accommodating groove 111 is smaller than a depth of the second accommodating groove 112, the main body 21 is disposed in the first accommodating groove 111, the connecting portion 22 is disposed in the second accommodating groove 112, an end of the connecting portion 22 is bent toward the main body 21 to form an adapter portion 221, and a terminal of the adapter portion 221 is connected with the main body 21. Because voltage acquisition end 32 or voltage acquisition piece 53 connect on connecting portion 22, so the thickness of connecting portion 22 department is great, adopts above-mentioned setting, can reduce the thickness size of collection subassembly in connecting portion 22 department, and further, has reduced the space that the collection subassembly took in battery module inside, improves the practicality of gathering the subassembly.

In the present embodiment, the bus bar 2 is made of a metal material, preferably an aluminum material or a copper material. The main body 21 and the connecting portion 22 are integrally formed.

The insulator 1 is made of plastic material, and the insulator 1 is rectangular plate-shaped. In other embodiments, the insulating member 1 may be made of other insulating materials, and the shape thereof may be adapted, which is not limited herein.

Preferably, a stopping portion 12 is convexly disposed on a side wall of the first receiving groove 111, and the stopping portion 12 is located on a side of the main body 21 facing the opening of the receiving groove 11 and can stop the bus bar 2, that is, the stopping portion 12 is used for stopping the bus bar 2, so that the bus bar 2 and the insulating member 1 can be connected.

The stopping portion 12 is also made of plastic material and has a certain elasticity, so that the bus bar 2 can be directly inserted into the accommodating groove 11 by pressing.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. 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. Gather the subassembly, its characterized in that includes:

an insulator (1);

the bus bar (2) is arranged on the insulating part (1) and is used for being electrically connected with the pole of the single battery;

the collecting wire harness (3) is provided with a composite collecting end (31), a voltage collecting end (32) and an output end, the voltage collecting end (32) is electrically connected with the bus bar (2), and the output end is connected with a connector (4);

the connecting module (5) comprises a collecting circuit board (51), a temperature collecting piece (52) and a voltage collecting piece (53), wherein the voltage collecting piece (53) is arranged in an insulating mode on the temperature collecting piece (52), the composite collecting end (31) is electrically connected with the collecting circuit board (51), the temperature collecting piece (52) is arranged on the collecting circuit board (51) and is electrically connected with the collecting circuit board (51), one end of the voltage collecting piece (53) is electrically connected with the collecting circuit board (51), and the other end of the voltage collecting piece (53) is electrically connected with the busbar (2).

2. The collecting assembly according to claim 1, wherein a gap (531) is formed in one end of the voltage collecting piece (53) connected with the collecting circuit board (51), the gap (531) penetrates through the voltage collecting piece (53) along a direction perpendicular to the collecting circuit board (51), a cladding (532) is convexly arranged on one side of the voltage collecting piece (53) opposite to the collecting circuit board (51), the cladding (532) is located on one side of the gap (531), the tail end of the cladding (532) is bent towards the gap (531), and the temperature collecting piece (52) is arranged in the gap (531).

3. The collection assembly of claim 2, wherein a filling space is defined between the covering portion (532), the wall of the gap (531) and the collection circuit board (51), and the filling space is filled with an insulating and heat-conducting glue.

4. The collection assembly according to claim 1, further comprising a connection circuit board (6), wherein the connection circuit board (6) is fixedly disposed on the insulating member (1), a fuse is disposed on the connection circuit board (6), the collection harness (3) and the connector (4) are both connected to the connection circuit board (6), and the collection harness (3) and the connector (4) are electrically connected through the fuse.

5. The acquisition assembly according to claim 4, characterized in that an insulating buffer layer is arranged between the connection circuit board (6) and the insulator (1);

and/or the collection assembly further comprises a protection member (7), wherein the protection member (7) is arranged on the connecting circuit board (6), and the connection position between the collection wiring harness (3) and the connecting circuit board (6) is positioned in the protection member (7).

6. Assembly according to any one of claims 1 to 5, wherein the collecting circuit board (51) is fixedly arranged on the insulating element (1), and an insulating buffer layer is arranged between the collecting circuit board (51) and the insulating element (1).

7. Assembly according to any one of claims 1 to 5, characterized in that the busbar (2) comprises a main body (21) and a connecting portion (22), the main body (21) being electrically connected to the pole, the connecting portion (22) being connected to the edge of the main body (21), the connecting portion (22) being connected to the voltage acquisition terminal (32) or to the voltage acquisition member (53).

8. The collection assembly according to claim 7, wherein the insulation member (1) has a first receiving groove (111) and a second receiving groove (112), the depth of the first receiving groove (111) is smaller than the depth of the second receiving groove (112), the main body (21) is disposed in the first receiving groove (111), the connecting portion (22) is disposed in the second receiving groove (112), and an end of the connecting portion (22) is bent toward the main body (21) and connected to the main body (21).

9. The collecting assembly according to any one of claims 1 to 5, wherein a receiving groove (11) is formed on the insulating member (1), a stopping portion (12) is convexly provided on a groove side wall of the receiving groove (11), the bus bar (2) is disposed in the receiving groove (11), the stopping portion (12) is located on a side of the bus bar (2) facing the opening of the receiving groove (11), and the stopping portion (12) is used for stopping the bus bar (2).

10. Battery module, characterized in that it comprises a single battery and a collecting assembly according to any one of claims 1 to 9, the busbar (2) being electrically connected to the poles of the single battery.