CN221126206U

CN221126206U - Integrated collection busbar and battery pack

Info

Publication number: CN221126206U
Application number: CN202322590060.0U
Authority: CN
Inventors: 章驰威; 郭永兴
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-06-11
Anticipated expiration: 2033-09-21

Abstract

The utility model discloses an integrated acquisition busbar and a battery pack, wherein the integrated acquisition busbar comprises: a support; the circuit board assembly is arranged on the supporting piece and is used for being electrically connected with the sampling interface of the battery management system; the conductive bus bar assembly comprises a plurality of conductive bus bars arranged at the upper end of the supporting piece at intervals along the length direction of the supporting piece, each conductive bus bar is electrically connected with the circuit board assembly, and each conductive bus bar is embedded with a positive temperature coefficient thermistor. By arranging the positive temperature coefficient thermistor in the conductive bus bar, the high-voltage circuit in the battery system can be protected while the battery system is electrically connected, and an open circuit state is formed in the conductive bus bar in time when the battery system is short-circuited so as to avoid ablation of the battery system caused by short circuit. In addition, by arranging the positive temperature coefficient thermistor, a fuse is not required to be arranged in the battery system, and the cost of the battery system can be reduced.

Description

Integrated collection busbar and battery pack

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to an integrated acquisition busbar and a battery pack.

Background

With the rapid development of new energy automobiles, the electrified trend of the power assembly is more and more obvious, and the battery is a power core of the new energy automobile and is an important component of the whole new energy automobile. The battery system of the new energy automobile is often formed by connecting a plurality of single batteries in series and parallel, and the service efficiency, the endurance mileage, the reliability and the like of the battery system are all related to the service performance and the safety of the whole automobile of the new energy automobile.

Along with the standardized development of the battery industry, the battery pack technology is also rapidly advanced, and the new energy automobile of CCS lithium electrodynamic force also enters the field of vision of people due to the high stability of the principle structure. The CCS lithium battery is a lithium battery module carrying CCS, each lithium battery module comprises a CCS module, and the CCS module is an integrated module formed by connecting 1-2 flexible circuit boards, plastic, other material structural members, copper-aluminum bars and control devices, wherein the integrated module is Cells Contact System, which is called CCS for short. The flexible circuit board (FPC or FFC) is a main component for connecting in the CCS module due to the characteristics of easy folding, multiple integrated lines, convenient installation and the like.

At present, the CCS module integrates the connection and control of the lithium battery module, the CCS integrated busbar is a part of the CCS module, the CCS integrated busbar is a highly integrated battery signal acquisition component, and the CCS integrated busbar is formed by a signal acquisition component (FPC, PCB, FFC and the like), a plastic structural part, a copper aluminum bar and the like, and is connected into a whole through the processes of hot pressing or riveting and the like, so that the high-voltage serial-parallel connection of the battery cells and the temperature sampling and the battery cell voltage sampling functions of the battery are realized, but when the CCS integrated busbar is connected and data are acquired, the short circuit of a battery system possibly occurs, and an acquisition line cannot be disconnected, thereby causing the ablation of the system.

Disclosure of utility model

The utility model aims to provide an integrated acquisition busbar and aims to solve the technical problem that an existing integrated module cannot be disconnected when in short circuit.

To achieve the above object, a first aspect of the present utility model provides an integrated acquisition busbar, including:

A support;

The circuit board assembly is arranged on the supporting piece and is used for being electrically connected with the sampling interface of the battery management system;

The conductive bus bar assembly comprises a plurality of conductive bus bars arranged at the upper end of the supporting piece at intervals along the length direction of the supporting piece, each conductive bus bar is electrically connected with the circuit board assembly, and each conductive bus bar is embedded with a positive temperature coefficient thermistor.

In the embodiment of the utility model, an insulating sheet is arranged between two adjacent conductive buses.

In the embodiment of the utility model, each conductive busbar is provided with two positive temperature coefficient thermistors, and the two positive temperature coefficient thermistors are respectively arranged corresponding to the positive output pole and the negative output pole of the battery core.

In the embodiment of the utility model, the upper ends of the plurality of conductive buses are provided with insulating brackets.

In the embodiment of the utility model, the integrated acquisition busbar further comprises a negative temperature coefficient thermistor, wherein the negative temperature coefficient thermistor is arranged between the conductive busbar and the circuit board assembly, and is adhered to the conductive busbar and electrically connected with the circuit board assembly.

In the embodiment of the utility model, the circuit board assembly comprises a flexible circuit board arranged on the side edge of the support piece along the length direction of the support piece and a collection connector connected with the flexible circuit board, wherein the collection connector is used for being electrically connected with the battery management system sampling interface, and the flexible circuit board is electrically connected with the plurality of conductive buses.

In the embodiment of the utility model, the integrated acquisition busbar further comprises nickel plates, and each conductive busbar is electrically connected with the flexible circuit board through the nickel plates.

In the embodiment of the utility model, the circuit board assembly further comprises a reinforcing plate, the reinforcing plate is connected with the supporting piece, and the collecting connector is arranged at one end, far away from the supporting piece, of the reinforcing plate.

In the embodiment of the utility model, a buffer piece is arranged on one side of the reinforcing plate, which faces the acquisition connector.

In the embodiment of the utility model, a limit post is arranged on one side of the support piece facing the flexible circuit board.

In the embodiment of the utility model, a plurality of explosion-proof valve holes are arranged on the support piece, and the explosion-proof valve holes are arranged in one-to-one alignment with a plurality of battery core explosion-proof valves of the battery core module.

In order to achieve the above purpose, the utility model also provides a battery pack, which comprises a battery cell module and the integrated acquisition busbar, wherein a plurality of conductive busbars of the integrated acquisition busbar are in one-to-one corresponding electric connection with a plurality of battery cell polar columns of the battery cell module.

Through the technical scheme, the integrated acquisition busbar provided by the embodiment of the utility model has the following beneficial effects:

The circuit board assembly is electrically connected with the conductive bus bar and used for collecting the cell data. Because the conductive bus is provided with the positive temperature coefficient thermistor, the contact resistance of the positive temperature coefficient thermistor is small at low temperature (less than 85 ℃), but the internal resistance is sharply increased at high temperature (more than 100 ℃); when the battery system is short-circuited, the current of the system exceeds 4000A, the temperature of the conductive bus bar rapidly exceeds 100 ℃, and at the moment, the internal resistance of the positive temperature coefficient thermistor is rapidly increased, and an open circuit state is formed in the conductive bus bar, so that a high-voltage circuit of the battery system is protected. By arranging the positive temperature coefficient thermistor in the conductive bus bar, the high-voltage circuit in the battery system can be protected while the battery system is electrically connected, and an open circuit state is formed in the conductive bus bar in time when the battery system is short-circuited so as to avoid ablation of the battery system caused by short circuit. In addition, by arranging the positive temperature coefficient thermistor, a fuse is not required to be arranged in the battery system, and the cost of the battery system can be reduced.

Additional features and advantages of embodiments of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain, without limitation, the embodiments of the utility model. In the drawings:

FIG. 1 is a schematic diagram of an integrated acquisition busbar according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a view angle of an integrated acquisition busbar according to another embodiment of the present utility model;

Fig. 3 is a schematic structural diagram illustrating another view angle of the integrated acquisition busbar according to another embodiment of the present utility model.

Description of the reference numerals

100. Support 200 circuit board assembly

210. Collecting connector of flexible circuit board 220

230. Reinforcing plate 240 buffer piece

300. Positive temperature coefficient thermistor of conductive bus 400

500. Insulating support of insulating sheet 600

700. Nickel sheet 800 limit column

900. Explosion-proof valve hole

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In view of the above, the utility model provides an integrated acquisition busbar and a battery pack, which aim to timely disconnect the integrated acquisition busbar when a short circuit occurs in a battery system and protect a high-voltage circuit of the battery system, so as to avoid ablation of the battery system caused by the short circuit of the circuit.

The integrated acquisition busbar according to the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the present utility model provides an integrated acquisition busbar, wherein the integrated acquisition busbar includes:

A support 100;

The circuit board assembly 200 is arranged on the supporting piece 100 and is used for being electrically connected with the sampling interface of the battery management system;

The conductive bus bar 300 assembly comprises a plurality of conductive bus bars 300 arranged at the upper end of the supporting member 100 at intervals along the length direction of the supporting member 100, each conductive bus bar 300 is electrically connected with the circuit board assembly 200, and each conductive bus bar 300 is embedded with a positive temperature coefficient thermistor 400.

The supporting member 100 may be a plastic absorbing member, which has light weight, excellent impact resistance, low price and high production efficiency, and is an insulating member, so that the insulating member can provide insulation protection for the circuit board assembly 200 and the conductive bus bar 300 while providing support for the circuit board assembly 200 and the conductive bus bar 300. The plurality of conductive bus bars 300 may be embedded in the support 100 and arranged in parallel along the length direction of the support 100. The conductive bus bar 300 in the embodiment of the utility model may be made of a material (PTC material) with a very high positive temperature coefficient and an aluminum alloy material, that is, the middle protruding portion of the conductive bus bar 300 is made of a PTC material, and the welding areas on both sides are made of an aluminum material, so that the PTC material has the characteristic that the resistivity increases with the increase of temperature, and the material can protect a circuit when the current surge is too large and the temperature is too high. The conductive buss bar 300 may be welded to the cell posts such that the positive and negative output poles of the cell form a high voltage electrical connection through the conductive buss bar 300.

In this embodiment, the cell modules in the battery system are formed by stacking the blade cells, the number of conductive buses 300 corresponds to the number of the blade cells in the cell modules, each conductive bus 300 is connected to the cell pole of one blade cell, that is, one conductive bus 300 connects the positive output pole and the negative output pole of one blade cell.

The battery management system is a system for intelligently managing and maintaining each battery unit, can prevent the battery from being overcharged and overdischarged, prolongs the service life of the battery system, and monitors the state of the battery system. The circuit board assembly 200 is electrically connected to each conductive bus 300, and the battery management system sampling interface of the conductive bus 300 is electrically connected, and the circuit board assembly 200 is used for collecting voltage, temperature and other data of the current core and transmitting the data to the battery management system through the battery management system sampling interface.

The conductive bus bar 300 is connected with the positive output pole and the negative output pole of the battery core, the battery core is connected in series under high voltage, the circuit board assembly 200 is electrically connected with the conductive bus bar 300, and the circuit board assembly 200 is used for collecting battery core data. Since the ptc thermistor 400 is provided on the conductive bus bar 300, the ptc thermistor 400 has a small contact resistance at low temperature (less than 85 ℃) but has a sharp increase in internal resistance at high temperature (more than 100 ℃); when the battery system is short-circuited, the current of the system exceeds 4000A, the temperature of the conductive bus bar 300 rapidly exceeds 100 ℃, and at this time, the internal resistance of the positive temperature coefficient thermistor 400 increases sharply, and an open circuit state is formed in the conductive bus bar 300, so that the high-voltage circuit of the battery system is protected, and the battery cells are prevented from being damaged. By providing the ptc thermistor 400 in the conductive bus 300, the high voltage circuitry in the battery system can be protected while the battery system is electrically connected, and an open circuit condition is timely formed in the conductive bus 300 when the battery system is shorted to avoid ablation of the battery system due to the short circuit. In addition, by providing the ptc thermistor 400, a fuse is not required to be provided in the battery system, and the cost of the battery system can be reduced.

In the embodiment of the present utility model, as shown in fig. 1, an insulating sheet 500 is disposed between two adjacent conductive bus bars 300. The insulating sheets 500 disposed between two adjacent groups of conductive buses 300 can insulate and separate the adjacent conductive buses 300, and improve the electrical gap (the shortest space distance measured between two conductive parts or between a conductive part and an equipment protection interface) and the creepage distance (the shortest distance measured along an insulating surface between two conductive parts or between a conductive part and an equipment protection interface) of the electrical core electrode post of the electrical core, thereby improving the safety performance of the battery system. Among them, the insulating sheet 500 may be a PET (polyethylene terephthalate) sheet, a PP (polypropylene) sheet, a PC (polycarbonate) sheet, a PVC (polyvinyl chloride) sheet, or the like. When the insulating sheet 500 is a PET (polyethylene terephthalate) sheet, it has good mechanical properties, good impact strength and good folding endurance; when the insulating sheet 500 is a PP (polypropylene) sheet, it has good chemical resistance, heat resistance, high strength mechanical properties, and good high abrasion resistance processability; when the insulating sheet 500 is a PC (polycarbonate) sheet, it has excellent electrical insulation, extensibility, dimensional stability, and chemical resistance, and has high strength, heat resistance, and cold resistance; when the insulating sheet 500 is a PVC (polyvinyl chloride) sheet, it has strong plasticity and corrosion resistance.

In the embodiment of the present utility model, as shown in fig. 1, each conductive busbar 300 is provided with two positive temperature coefficient thermistors 400, and the two positive temperature coefficient thermistors 400 are respectively arranged corresponding to the positive output pole and the negative output pole of the battery cell. By providing the two positive temperature coefficient thermistors 400 corresponding to the positive output pole and the negative output pole of the battery cell on the conductive bus bar 300, when the battery system is short-circuited, the current of the system will exceed 4000A, the temperature of the conductive bus bar 300 will rapidly exceed 100 ℃, at this time, the internal resistances of the two positive temperature coefficient thermistors 400 are rapidly increased, and the formation of an open circuit state in the conductive bus bar 300 is ensured, thereby protecting the high voltage circuit of the battery system. And when the battery system is normal, the internal resistances of the two positive temperature coefficient thermistors 400 are small, so that an electrical connection can be formed in the battery system.

In an embodiment of the present utility model, as shown in fig. 1 to 3, each conductive bus bar 300 is electrically connected to the circuit board assembly 200 through a nickel plate 700. The nickel plate 700 has good safety, and the conductive bus bar 300 and the circuit board assembly 200 are connected through the nickel plate 700, so that the integrated acquisition bus bar has good safety and stability. Wherein, flexible circuit board 210 and nickel piece 700 can be connected through the solder paste to with nickel piece 700 welding on conductive busbar 300, welding process is simple, and the operation of being convenient for and welded stability is good. The circuit board assembly 200 may be electrically connected to the conductive buss bar 300 through the nickel tab 700 to collect the voltage of the cells in the battery system.

In the embodiment of the present utility model, the upper ends of the plurality of conductive bus bars 300 are provided with the insulating holders 600. The insulating stent 600 may be a PET (polyethylene terephthalate) stent, a PP (polypropylene) stent, a PC (polycarbonate) stent, a PVC (polyvinyl chloride) stent, or the like. When the insulating bracket 600 is a PET (polyethylene terephthalate) bracket, the insulating bracket has good mechanical property, better impact strength and good folding endurance; when the insulating support 600 is a PP (polypropylene) support, it has good chemical resistance, heat resistance, high strength mechanical properties, and good high abrasion resistance processability; when the insulating holder 600 is a PC (polycarbonate) holder, it has excellent electrical insulation, extensibility, dimensional stability, and chemical resistance, and has high strength, heat resistance, and cold resistance; when the insulating stent 600 is a PVC (polyvinyl chloride) stent, it has strong plasticity and corrosion resistance. Wherein, can carry out the gum at the lower extreme of insulating support 600 and handle, then bond insulating support 600 and the upper end of a plurality of conductive busbar 300, insulating support 600 can improve the insulating properties of integrated collection busbar when fixing a plurality of conductive busbar 300 subassemblies.

In an embodiment of the present utility model, the integrated acquisition busbar further includes a negative temperature coefficient thermistor, which is bonded to the conductive busbar 300 and electrically connected to the circuit board assembly 200. The negative temperature coefficient thermistor, also called an NTC thermistor, is a type of sensor resistor whose resistance value decreases with an increase in temperature, and is adhered to the conductive bus bar 300 to collect the temperature of the battery system. In order to improve the accuracy of temperature acquisition, a plurality of negative temperature coefficient thermistors may be disposed in the battery system, and the disposed positions and the disposed number of the negative temperature coefficient thermistors may be set according to practical situations, for example, in one embodiment, two negative temperature coefficient thermistors may be disposed at two side ends of the integrated circuit board assembly 200 respectively.

In an embodiment of the present utility model, as shown in fig. 1, the circuit board assembly 200 includes a flexible circuit board 210 disposed at a side of the support 100 along a length direction of the support 100, and a collection connector 220 connected to the flexible circuit board 210, the collection connector 220 being used for electrically connecting with a battery management system sampling interface, and the flexible circuit board 210 being electrically connected with a conductive bus bar 300. The flexible circuit board 210 is a flexible printed circuit board having high reliability and excellent flexibility, and the flexible circuit board 210 has the characteristics of high wiring density, light weight, thin thickness, and good flexibility. The flexible circuit board 210 may be adhered to the support 100, and in particular, the flexible circuit board 210 may be adhered to the support 100 by a double-sided tape, and the flexible circuit board 210 may be adhered to the side of the support 100 along the length direction of the support 100 to connect each conductive bus bar 300. In a preferred embodiment, the flexible circuit board 210 may be a double-sided board, in which a layer of etched conductive patterns is formed on each of two sides of the base film of the flexible circuit board 210, and the metallized holes connect the patterns on two sides of the insulating material to form conductive paths to satisfy the design and use functions of flexibility. The voltage and the temperature of the battery cell are acquired by using the double-sided board, so that the space utilization rate is higher.

In addition, in the embodiment of the utility model, the flexible circuit board 210 is an FPC, and the flexible copper foil is processed by chemical etching to obtain circuit boards with different circuit patterns, so that the FPC has high assembly density, small volume and light weight, can increase wiring layers, improves design elasticity, has good heat dissipation and solderability, is easy to mount and has low comprehensive cost. The collection connector 220 is used for electrically connecting with a sampling interface of the battery management system, signals such as the temperature of the battery core and the voltage of the battery core collected by the flexible circuit board 210 are transmitted to the battery management system through the collection connector 220, and after the battery management system receives the temperature and the voltage of the battery core, each battery unit is intelligently managed and maintained.

In other embodiments, the circuit board assembly 200 includes a flat circuit board disposed along a length direction of the support 100 at a side of the support 100 and a pick-up connector 220 connected with the flexible circuit board 210. The flat circuit board is FFC, and FFC is the circuit board that forms with upper and lower two-layer insulating foil membrane centre clamp flat copper foil, and the finished product is simpler, but possesses higher assembly reliability and quality, and movable, crooked, torsion can not damage the wire, can follow different shapes and special encapsulation size to FFC's small, the weight is light, has outstanding electric function, dielectric function, heat resistance.

It should be noted that, when the number of the blade cells in the battery system is greater, the cell modules are divided into multiple groups, for convenience in production and installation, the supporting member 100 in the integrated collection busbar may include multiple supporting plates and connecting members for connecting two adjacent supporting plates, each supporting plate is provided with multiple conductive buses 300 at intervals, each supporting plate is provided with a flexible circuit board 210 connected with the conductive buses 300, and the flexible circuit boards 210 on the multiple supporting plates are electrically connected with the collection connector 220. Specifically, as shown in fig. 2 and fig. 3, when the battery modules in the battery system are two groups, the integrated collection busbar may include two supporting members 100, the two supporting members 100 are connected by a connecting member, a plurality of conductive buses 300 are disposed on the two supporting members 100 at intervals, flexible circuit boards 210 connected to the conductive buses 300 are disposed on the supporting members 100, and the two flexible circuit boards 210 are electrically connected to the collection connector 220 after being electrically connected.

In an embodiment of the present utility model, as shown in fig. 1, the circuit board assembly 200 further includes a reinforcing plate 230, the reinforcing plate 230 is connected to the supporting member 100, and the collecting connector 220 is disposed at an end of the reinforcing plate 230 away from the supporting member 100. By providing stiffener 230, space and support is provided for the installation of the collector, and the installation and data transfer of collection connector 220 may be facilitated. The flexible circuit board 210 may be disposed along the stiffener 230 to connect with the acquisition connector 220. Wherein, the stiffening plate 230 can be provided with the bolster 240 towards one side of gathering connector 220, plays the cushioning protection effect to gathering connector 220 through the bolster 240, avoids the structure to strike and causes gathering connector 220 to damage. The buffer member 240 may be foam, and the foam fixing reinforcing plate 230 may be adhered by double-sided adhesive tape to one side of the collecting connector 220, and in other embodiments, the buffer member 240 may be a rubber member, a plastic member, or other elastic members, which does not limit the buffer member 240 specifically, but only needs to play a role in buffering and protecting the collecting connector 220.

In the embodiment of the present utility model, as shown in fig. 1, a side of the support 100 facing the flexible circuit board 210 is provided with a limit post 800. The temperature and the voltage of the battery cell are collected by arranging the integrated collection busbar on the battery cell module, at this time, the flexible circuit board 210 is exposed, and in order to protect the flexible circuit board 210 and increase the aesthetic degree of the battery system, an outer cover part connected with the battery system can be arranged on one side of the integrated collection busbar deviating from the battery cell. In order to facilitate the installation of the outer cover, a limiting column 800 may be disposed on the supporting member 100, and the limiting column 800 plays a role in positioning and limiting the installation of the outer cover. And set up the enclosing cover spare, can also carry out further fixed to the female row of integrated collection, improve battery system's stability.

In the embodiment of the present utility model, as shown in fig. 1, a plurality of explosion-proof valve holes 900 may be provided on the support member 100, where the plurality of explosion-proof valve holes 900 are aligned with a plurality of battery core explosion-proof valves of the battery core module, and the plurality of explosion-proof valve holes 900 are designed to avoid at the positions of the battery core explosion-proof valves. When electric core thermal runaway in battery system, electrolyte will be spouted from electric core explosion-proof valve, if electrolyte spouts to the collection busbar, will make the collection busbar take place to damage, and set up explosion-proof valve opening 900 the back, from electric core explosion-proof valve in-out electrolyte will be spouted from explosion-proof valve opening 900 to avoid the electrolyte to spout to the collection busbar on, and then ensure electrical separation.

In order to achieve the above object, the present utility model further provides a battery pack, which includes a battery cell module and the integrated acquisition busbar according to the above, and the conductive busbar 300 of the integrated acquisition busbar is electrically connected with the battery cell post of the battery cell module. Since the ptc thermistor 400 is provided on the conductive bus bar 300, the ptc thermistor 400 has a small contact resistance at low temperature, but has a steep increase in internal resistance at high temperature (more than 100 ℃); when the battery pack is shorted, the current of the system will exceed 4000A, the temperature of the conductive bus bar 300 will rapidly exceed 100 ℃, at this time, the internal resistance of the ptc thermistor 400 increases sharply, and an open circuit state is formed in the conductive bus bar 300, thereby protecting the high voltage circuit of the battery pack. By providing the ptc thermistor 400 in the conductive buss 300, the high voltage circuitry in the battery pack can be protected while forming an electrical connection in the battery pack, avoiding ablation of the battery pack due to a short circuit. In addition, by providing the ptc thermistor 400, a fuse is not required to be provided in the battery pack, and the cost of the battery pack can be reduced. In addition, the battery pack adopts all the technical schemes of the above embodiments, so that the battery pack has at least all the beneficial effects brought by the technical schemes of the above embodiments, and the details are not repeated here.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. An integrated collection busbar, wherein, integrated collection busbar includes:

a support (100);

The circuit board assembly (200) is arranged on the supporting piece (100) and is used for being electrically connected with the battery management system sampling interface;

The conductive bus assembly comprises a plurality of conductive buses (300) which are arranged at the upper end of the supporting piece (100) at intervals along the length direction of the supporting piece (100), each conductive bus (300) is electrically connected with the circuit board assembly (200), and each conductive bus (300) is embedded with a positive temperature coefficient thermistor (400).

2. The integrated acquisition busbar of claim 1, wherein an insulating sheet (500) is provided between two adjacent conductive buss bars.

3. The integrated acquisition busbar according to claim 1, wherein two positive temperature coefficient thermistors (400) are disposed on each conductive busbar (300), and the two positive temperature coefficient thermistors (400) are disposed corresponding to a positive output pole and a negative output pole of the battery cell, respectively.

4. The integrated acquisition busbar of claim 2, wherein the upper ends of a plurality of the conductive buss bars are provided with insulating brackets (600).

5. The integrated acquisition busbar of any of claims 1-4, further comprising a negative temperature coefficient thermistor disposed between the conductive buss bar (300) and the circuit board assembly (200), the negative temperature coefficient thermistor being bonded to the conductive buss bar (300), the negative temperature coefficient thermistor being electrically connected to the circuit board assembly (200).

6. The integrated acquisition busbar of any of claims 1-4, wherein the circuit board assembly (200) includes a flexible circuit board (210) disposed along a length of the support (100) on a side of the support and an acquisition connector (220) coupled to the flexible circuit board (210), the acquisition connector (220) being configured to electrically connect to the battery management system sampling interface, the flexible circuit board (210) being electrically connected to a plurality of the conductive buss bars (300).

7. The integrated acquisition busbar of claim 6, further comprising nickel tabs (700), each of the conductive buss bars (300) being electrically connected to the flexible circuit board (210) through the nickel tab (700).

8. The integrated acquisition busbar of claim 6, wherein the circuit board assembly (200) further comprises a stiffening plate (230), the stiffening plate (230) being connected to the support (100), the acquisition connector (220) being provided at an end of the stiffening plate (230) remote from the support (100).

9. The integrated acquisition busbar of claim 8, wherein a side of the stiffening plate (230) facing the acquisition connector (220) is provided with a buffer (240).

10. The integrated acquisition busbar of claim 6, wherein a side of the support (100) facing the flexible circuit board (210) is provided with a limit post (800).

11. The integrated collection busbar according to any one of claims 1 to 4, wherein the support member (100) is provided with a plurality of explosion-proof valve holes (900), and a plurality of explosion-proof valve holes (900) are aligned with a plurality of battery cell explosion-proof valves of the battery cell module.

12. A battery pack, characterized in that it comprises a cell module and an integrated acquisition busbar according to any one of the preceding claims 1-11, a plurality of conductive busbars (300) of the integrated acquisition busbar being electrically connected in one-to-one correspondence with a plurality of cell poles of the cell module.