CN221150110U

CN221150110U - Battery cell acquisition circuit, module slave board, battery pack and electric equipment

Info

Publication number: CN221150110U
Application number: CN202322666618.9U
Authority: CN
Inventors: 刘学文; 赵亮
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-06-14
Anticipated expiration: 2033-09-28

Abstract

The utility model provides a battery cell acquisition circuit, a module slave board, a battery pack and electric equipment, wherein the acquisition circuit comprises at least two acquisition chips arranged between a communication input port and a communication output port and a plurality of voltage acquisition parts; the communication input port is connected with the acquisition chip at the same end, the communication output port is connected with the acquisition chip at the same end, and two adjacent acquisition chips are connected; when the design number of the battery core acquisition points is greater than the number of the battery cores, redundant battery core acquisition points positioned at the end parts are cut off, and the battery core acquisition points and all the cut acquisition channels form a disconnection channel which is connected with the battery core acquisition point at the tail end. According to the battery core acquisition circuit, the battery core acquisition points are connected through the matching of the at least two acquisition chips, when the acquisition channel is remained, the battery core acquisition points are connected with the end-most battery core acquisition points through the disconnection channel, so that the normal operation of the acquisition chips can be ensured, and the battery cores in a certain number can be acquired, thereby improving the universality of the battery core acquisition circuit.

Description

Battery cell acquisition circuit, module slave board, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of power batteries, in particular to an electric core acquisition circuit. The utility model also relates to a module slave board provided with the battery core acquisition circuit, a battery pack and electric equipment.

Background

The current development trend of the power battery system is that structural components and electric components are simplified and reduced gradually, and the requirements of the battery pack on volume grouping efficiency and charging capacity are higher and higher, so that sufficient space cannot be reserved for arrangement of electric components such as wire harnesses in the battery pack, and the trend of electrical harness removal is more and more obvious.

The more widely the current blade electricity core is used, the blade module adopts integrated slave board design, can realize gathering the very big reduction of pencil. The battery cell is directly connected with the acquisition slave plate by adopting a nickel sheet, and the length of the acquisition slave plate is basically equal to that of the battery cell. When the battery cell serial number changes, the battery pack cannot be compatible with different battery cell serial number modules, and the battery pack scheme needs a plurality of specification slave plates because the modules with different serial numbers can appear in the battery pack with high probability, and the slave plates cannot be generalized. In addition, the current acquisition chip needs to be matched with a connector for signal transmission when in use, so that the production cost of the acquisition slave plate is higher.

Disclosure of utility model

In view of the foregoing, the present utility model is directed to a battery cell acquisition circuit, so as to be able to acquire a certain number of battery cells, thereby improving its versatility.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the battery cell acquisition circuit is used for acquiring battery cell information of a plurality of battery cells which are arranged in parallel;

the acquisition circuit comprises at least two acquisition chips arranged between the communication input port and the communication output port, and a plurality of voltage acquisition parts which are connected with a plurality of acquisition channels on each acquisition chip in a one-to-one correspondence manner;

The communication input port is connected with the acquisition chips at the same end, the communication output port is connected with the acquisition chips at the same end, and two adjacent acquisition chips are connected;

When the design number of the battery core acquisition points is larger than the number of the battery cores, redundant battery core acquisition points positioned at the end parts are cut off, each acquisition channel disconnected with the cut-off battery core acquisition points forms a disconnection channel, and each disconnection channel can be connected with the battery core acquisition point at the tail end.

Further, each acquisition channel is connected with a bonding pad, and the battery cell acquisition points are arranged on the bonding pads;

Each breaking channel is connected with the battery cell collection point on the terminal-most bonding pad through soldering tin or a wire.

Compared with the prior art, the utility model has the following advantages:

According to the battery core acquisition circuit, when the design number of the battery core acquisition points is larger than the number of the battery cores, redundant battery core acquisition points positioned at the end parts can be cut off, and a disconnection channel connected with the cut-off battery core acquisition points is connected with the battery core acquisition point at the tail end, so that the acquisition chip works normally, and therefore, the battery cores which do not exceed the number of the battery core acquisition points can be acquired, and the battery core acquisition circuit has good universality. Meanwhile, the scheme of realizing signal transmission through connection between the acquisition chips is beneficial to reducing the production cost compared with the scheme of adopting a connector in the prior art.

In addition, the cell collection points are arranged on the bonding pads, and the disconnection channels are connected with the cell collection points at the tail ends, so that the arrangement and implementation are easy.

In addition, another object of the present utility model is to provide a module slave board, which includes a collecting board body, and the collecting board body is provided with the electrical core collecting circuit.

Further, a plurality of electric core collection points are respectively arranged at two sides of the collection plate body, and are arranged at intervals and in a staggered manner along the length direction of the collection plate body.

Further, a plurality of cutting identification lines are arranged at one end of the collecting plate body at intervals, and each cutting identification line is located between two adjacent electric core collecting points.

Further, the plurality of cutting identification lines are all positioned at the outer side of the acquisition chip at the same end.

Compared with the prior art, the utility model has the following advantages:

The module slave board can realize the acquisition of the battery cells which do not exceed the number of the battery cell acquisition points by arranging the battery cell acquisition circuit, and has better universality.

In addition, the arrangement mode of the plurality of battery core acquisition points is beneficial to realizing connection of the battery core acquisition points and each battery core, and is convenient for acquiring the information of the battery core. Through setting up many mark lines of cutting, do benefit to and cut unnecessary electric core collection point according to the quantity of electric core, and satisfy the collection demand to electric core and gather the user demand of chip. The plurality of cutting identification lines are arranged on the outer side of the acquisition chip, so that the influence on the using effect of the acquisition chip when redundant electric core acquisition points are cut is avoided.

In addition, another object of the present utility model is to provide a battery pack, which includes a plurality of battery modules and a plurality of module slave plates as described above, wherein the plurality of module slave plates are disposed in one-to-one correspondence with the battery modules.

The battery pack has the same beneficial effects as the module slave plate, and is not repeated here.

A further object of the utility model is to provide an electrical consumer provided with a battery pack as described above

The electric equipment has the same beneficial effects as the battery pack.

Drawings

The accompanying drawings, which are included to provide a further understanding 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 the utility model. In the drawings:

Fig. 1 is a schematic structural diagram of a cell acquisition circuit on the left side of a module slave board according to the first and second embodiments of the present utility model;

Fig. 2 is a schematic structural diagram of a cell acquisition circuit on the right side of a module slave board according to the first and second embodiments of the present utility model;

FIG. 3 is a schematic diagram of a collection point editing circuit according to an embodiment of the utility model;

Reference numerals illustrate:

1. a module slave plate; 2. a first acquisition chip; 3. a second acquisition chip;

100. a communication input port; 200. a communication outlet; 300. a cell acquisition point; 301. and (5) stitching.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The embodiment relates to a battery cell acquisition circuit which is used for acquiring battery cell information of a plurality of battery cells which are arranged in parallel.

In the overall structure, the acquisition circuit of the embodiment includes at least two acquisition chips disposed between the communication input port 100 and the communication output port 200, and a plurality of voltage acquisition units connected to a plurality of acquisition channels on each acquisition chip in a one-to-one correspondence.

The communication input port 100 is connected with the acquisition chip at the same end, the communication output port 200 is connected with the acquisition chip at the same end, and two adjacent acquisition chips are connected.

When the number of the cell collection points 300 is greater than the number of the cells, the cell collection points 300 at the end part are cut off, each collection channel disconnected with the cut-off cell collection points 300 forms a disconnection channel, and each disconnection channel can be connected with the cell collection point 300 at the tail end.

When the battery cell acquisition circuit in the embodiment is applied, information acquisition can be carried out on battery cells which are not more than 300 battery cell acquisition points, and the battery cell acquisition circuit has good universality.

The cell acquisition circuit in the present embodiment is specifically disposed on the PCB board of the module slave 1, and as a structural example, the arrangement structure of the cell acquisition circuit on the module slave 1 is shown in fig. 1 and 2. The number of the acquisition chips is two, and each acquisition chip is provided with 12 acquisition channels. The communication input port 100 is located at the left end of the module slave board 1, and the communication output port 200 is located at the right end of the module slave board 1. The two acquisition chips are arranged between the communication input port 100 and the communication output port 200 at intervals along the length direction of the module slave board 1.

For convenience of description below, the acquisition chip disposed to the left is referred to as a first acquisition chip 2, and the acquisition chip disposed to the right is referred to as a second acquisition chip 3. The first acquisition chip 2 is connected with the communication input port 100 through a connection, the second acquisition chip 3 is connected with the communication output port 200, and the first acquisition chip 2 and the second acquisition chip 3 are connected through a circuit conduction line. In this embodiment, the cell information input by the communication input port 100 is sequentially transmitted to the first acquisition chip 2 and the second acquisition chip 3, and is output by the communication output port 200.

In this embodiment, the plurality of battery core collection points 300 are separately disposed at two sides of the module slave board 1, and the plurality of battery core collection points 300 at two sides are staggered along the length direction of the module slave board 1, so that the battery core information of the battery core is collected. As a preferred embodiment, the cell collection points 300 are used to collect voltage information of the cell.

In addition, each collecting channel is connected with a bonding pad, and the battery cell collecting point 300 is arranged on the bonding pad. Each break channel is connected to a die pick-up point 300 on the endmost pad by solder or wire. In particular, one side of the bonding pad is connected to the collection channel on the collection chip, and the other side is connected to the corresponding cell collection point 300. So set up, be convenient for realize gathering the connection between passageway and the corresponding acquisition point.

Along the left-to-right direction in fig. 1 and 2, the plurality of cell collection points 300 on the side of the module from the board 1 are V ₀、V₂、V₄、V₆……V₂₄, respectively. The plurality of cell collection points 300 on the other side of the module from the board 1 are V ₁、V₃、V₅、V₇……V₂₃ respectively. Wherein, GND1 and V ₀ are set together, GND1 and 12V+ provide working power supply for the first acquisition chip 2. V13-is the power supply of the second acquisition chip 3 and is also the starting point of the acquisition of the second acquisition chip 3.

The multiple cells arranged side by side are arranged in series, two points V ₀ and V ₁ are matched to collect voltage information of a first cell, two points V ₁ and V ₂ are matched to collect voltage information of a second cell, and two points V _x-1 and V _x are matched to collect voltage information of an X-th cell.

Because the normal operation of the acquisition chip has voltage limitation, the voltages of GND1 and Vx points need to be larger than a certain value to normally operate. In addition, the acquisition channels on each acquisition chip that are connected to cell acquisition point 300 after cell acquisition point Vx need to be connected to Vx, i.e., all pins 301 after Vx on the chip need to be filled with Vx acquisition point signals.

When the electric core acquisition circuit in this embodiment is applied, when the number of electric core acquisition points 300 is greater than the number of electric cores, that is, after twelve acquisition channels in the first acquisition chip 2 are all connected with the electric cores through corresponding electric core acquisition points 300, part of acquisition channels of the second acquisition chip 3 are connected with the electric cores through the electric core acquisition points 300, and when the rest of electric core acquisition parts connected with the part of acquisition channels appear. The remaining cell collection points 300 and collection channels need to be processed.

Specifically, each remaining cell collection point 300 in the cell collection circuit needs to be disconnected from the corresponding collection channel, and the part of collection channels form a disconnection channel due to disconnection, at this time, the disconnection channel is connected with a cell collection part connected with the end cell, and at this time, the purpose of filling all pins 301 after Vx on the chip with Vx collection point signals is achieved.

As an embodiment, assuming that the acquisition chip needs to connect a minimum of 7 cells to work properly, the module can acquire a minimum of 12 plus 7, i.e. 19, cells from the board 1, and the number of required cell acquisition points 300 is 19, which is less than the total number 24 of total cell acquisition points 300.

At this time, the electrical core collecting point V ₂₀、V₂₁、V₂₂、V₂₃、V_24/POWER needs to be cut off, so that the corresponding collecting channels in the second collecting chip 3 are disconnected, that is, a plurality of unconnected collecting channels remain on the second collecting chip 3. At this time, the connection between each of the non-connected collecting channels and the bonding pad connected to the nineteenth cell is realized with the cell collecting point 300 provided on the nineteenth cell.

And similarly, if the number of the collecting cores is 20, cutting off the collecting points V ₂₁、V₂₂、V₂₃、V_24/POWER of the electric core, so that the corresponding collecting channels in the second collecting chip 3 are disconnected, namely a plurality of unconnected collecting channels are remained on the second collecting chip 3, and at the moment, the unconnected collecting channels are connected with the bonding pads connected with the twentieth electric core to realize the connection with the collecting points 300 of the electric core arranged on the twentieth electric core.

To facilitate the cutting and re-lapping of the circuit, as shown in fig. 1 and 2, a collection point editing circuit is provided in close proximity to the second collection chip 3, through which V ₁₉、V₂₀、V₂₁、V₂₂、V₂₃、V_24/POWER is connected to the collection channels in the second collection chip 3, respectively.

The structure of the collection point editing circuit in this embodiment is shown in fig. 3, and the remaining plurality of cell collection points 300 are connected to corresponding pins 301 on the second collection chip 3 through bonding pads. When the remaining plurality of die attach sites 300 are cut, solder or wire may be used to connect the remaining plurality of pads to achieve the connection with the last die attach site 300. In this embodiment, the cutting of the remaining plurality of cell collection points 300 refers to: the remaining plurality of cell collection points 300 are deleted such that the remaining cell collection points 300 are disconnected from the corresponding pins 301. The disconnected pins 301 (i.e., the remaining pins 301) are connected to the pads of the terminal-most die attach portion 300 by soldering during printing.

It should be noted that, in this embodiment, the number of the acquisition chips may be increased according to the use requirement, at this time, the increase/decrease acquisition chips are located between the first acquisition chip 2 and the second acquisition chip 3, and each of the cell acquisition points 300 of the newly added acquisition chip is connected with the cell respectively, so as to cooperate with the first acquisition chip 2 and the second acquisition chip 3 to acquire the cell voltage information. In addition, the number of the acquisition channels in the acquisition chip can also be set according to the use requirement.

The battery core acquisition circuit of this embodiment can be when the design quantity of battery core acquisition point 300 is greater than the quantity of electric core, cut off the unnecessary electric core acquisition point 300 that is located the tip to make the disconnection passageway that links to each other with the electric core acquisition point that is cut off be connected with terminal electric core acquisition point 300, make the normal work of collection chip, thereby satisfy and not surpass electric core acquisition point quantity, different quantity electric core gathers, and have better commonality. Meanwhile, the scheme of realizing signal transmission through connection between the acquisition chips is beneficial to reducing the production cost compared with the scheme of adopting a connector in the prior art.

Example two

The present embodiment relates to a module slave 1, as shown in fig. 1 and 2, including a collecting board body on which the above-described cell collecting circuit is provided. The plurality of battery cell collection points 300 are respectively arranged on two sides of the collection board body, and are arranged at intervals and in a staggered manner along the length direction of the collection board body, so that information can be collected on the plurality of battery cells arranged in series.

As described in embodiment one, the module slave plate 1 in this embodiment can be used to collect the voltage of the current core. To facilitate the cutting of the remaining cell collection points 300 in the cell collection circuit on the collection plate body. As shown in fig. 2, a plurality of cutting identification lines are arranged at one end of the collecting plate body at intervals, and each cutting identification line is located between two adjacent cell collecting points 300.

As an example, the cutting identification lines are respectively arranged between the adjacent V ₁₉、V₂₀、V₂₁、V₂₂、V₂₃、V_24/POWER. And the cut identification lines are respectively called a first identification line and a second identification line … … as a fifth identification line along the left-to-right direction. The second acquisition chip 3 is specifically located at the left side of the first identification line, so as to prevent the second acquisition chip 3 from being cut off in the cutting process. When the module in fig. 1 and fig. 2 collects 19 electric cores from the board 1, the right end of the collecting board body is cut along the first identification line, when 20 electric cores need to be collected, the right end of the collecting board body is cut along the second identification line, and the like. The structure of the mark line is simple, the mark line is convenient to arrange and implement, the mark line can indicate cutting, the structure of the left side part of the damage caused by cutting is prevented, and the mark line has good practicability.

The method of using the module slave plate 1 in the embodiment to collect the different number of cells is the same as that in the first embodiment, and will not be described here again.

When the method is specifically implemented, the module slave board 1 in the embodiment is adopted, and the method can be compatible with different serial number schemes for collection only by simple cutting and signal editing lap joint, is convenient to manage and stock, is beneficial to reducing production cost, and avoids the problems that different projects need to newly open various slave board hardware, waste development and test cost and the like.

In addition, the embodiment also relates to a battery pack and electric equipment. The battery pack comprises a plurality of battery modules and a plurality of module slave plates 1 which are arranged in one-to-one correspondence with the battery modules. The electric equipment is provided with a battery pack. The battery pack and the electric equipment in the embodiment have the same beneficial effects as the module slave board 1, and are not described herein.

Example III

The embodiment relates to a module slave board design method, which comprises the following steps of;

according to the number of the battery cores in a list of battery core units and the number of the acquisition channels in the acquisition chips, the number of the acquisition chips required to be arranged on the slave board 1 of the module is determined.

The acquisition chips are arranged on the module slave plate 1 at intervals, and a plurality of acquisition channels in each acquisition chip are respectively connected with a plurality of battery core acquisition points 300 on two sides of the module slave plate 1 in a one-to-one correspondence mode in sequence.

The acquisition cell at one end is connected with the communication output port 200 at the same end, the acquisition cell at the other end is connected with the communication input port 100 at the same end, and two adjacent acquisition chips are connected.

When a plurality of acquisition channels remain after the acquisition chip at one end is connected with the corresponding plurality of cell acquisition points 300, pins 301 of the remaining acquisition channels are filled with the acquisition signals of the last cell acquisition point 300.

In practical implementation, the module slave board design method in this embodiment can obtain the cell acquisition circuit in the first embodiment and the module slave board 1 in the second embodiment.

In this embodiment, when a plurality of acquisition channels remain after the acquisition chip at one end is connected to the corresponding plurality of cell acquisition points 300, the pins 301 of the remaining acquisition channels are filled with the acquisition signals of the last cell acquisition point 300. Namely, in the first embodiment: and disconnecting each remaining battery cell acquisition point 300 in the battery cell acquisition circuit from the corresponding acquisition channel, wherein the part of the acquisition channels form a disconnection channel due to disconnection, and at the moment, the disconnection channel is connected with a battery cell acquisition part connected with the battery cell at the tail end. I.e. the purpose of filling all pins 301 after Vx on the chip with Vx pick-up point signals is achieved.

According to the method for designing the module slave board 1, the number of the module slave boards 1 is determined according to the number of the battery cores and the number of the acquisition channels in the acquisition chips, the acquisition channels on the acquisition chips are respectively connected with the battery cores, and when the rest acquisition channels exist in one acquisition chip, the pins 301 of the rest acquisition channels are filled with the acquisition signals of the last battery core acquisition point 300, so that the acquisition chips can work normally.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides a electric core acquisition circuit for gather the electric core information of a plurality of electric cores of arranging side by side, its characterized in that:

The acquisition circuit comprises at least two acquisition chips arranged between the communication input port and the communication output port, and a plurality of battery core acquisition points which are connected with a plurality of acquisition channels on each acquisition chip in a one-to-one correspondence manner;

When the design number of the cell collection points is greater than the number of the cells, redundant cell collection points positioned at the end parts are cut off, the collection channels disconnected with the cut-off cell collection points form disconnection channels, and the disconnection channels can be connected with the cell collection points at the tail end.

2. The cell harvesting circuit of claim 1, wherein:

Each acquisition channel is connected with a bonding pad, and the battery cell acquisition points are arranged on the bonding pads;

3. The utility model provides a module is from board, includes collection board body, its characterized in that:

The acquisition board body is provided with the battery cell acquisition circuit as claimed in claim 1 or 2.

4. A modular slave according to claim 3, wherein:

the plurality of battery cell collection points are respectively arranged at two sides of the collection plate body, and are arranged at intervals and in a staggered manner along the length direction of the collection plate body.

5. The modular slave board of claim 4, wherein:

One end of the acquisition board body is provided with a plurality of cutting identification lines which are arranged at intervals, and each cutting identification line is positioned between two adjacent electric core acquisition points.

6. The modular slave board of claim 5, wherein:

and the cutting identification lines are positioned at the outer sides of the acquisition chips at the same end.

7. A battery pack, characterized in that:

a plurality of module slave plates according to any one of claims 3 to 6, including a plurality of battery modules, which are provided in one-to-one correspondence with the battery modules.

8. An electrical consumer, characterized in that:

The battery pack of claim 7 is arranged on the electric equipment.