CN219269158U - A circuit board assembly and battery pack - Google Patents

Abstract

The utility model discloses a circuit board assembly and a battery pack, wherein the circuit board assembly comprises an acquisition wire harness plate and an insulation positioning piece, the insulation positioning piece is fixedly connected with the acquisition wire harness plate, the insulation positioning piece comprises a positioning structure, and the positioning structure is used for positioning and mounting a battery cell of the battery pack so as to position the installation position of the acquisition wire harness plate in the battery pack, realize the positioning efficiency of the acquisition wire harness plate and the battery cell, and further improve the assembly efficiency of the battery; in addition, the circuit board assembly can further comprise the conductive bars electrically connected with the acquisition wire harness board, and the number of the conductive bars can be flexibly configured according to the number of the electric cores in the product, so that the cost of the battery is saved.

Description

A circuit board assembly and battery pack

technical field

The utility model relates to the technical field of electric energy, in particular to a circuit board assembly and a battery pack.

Background technique

With the continuous development of science and technology, power batteries are used more and more widely, especially in the field of electric vehicles.

At present, a power battery includes several cells, and each cell is assembled into a battery pack, and multiple battery packs are installed in a box in a series-parallel manner to be assembled into a battery pack. Among them, the power battery also has a cable, which can not only realize the connection between the cells or battery packs in the power battery, but also realize the transmission of data between the internal components of the power battery and the outside world. The length of the cable is usually relatively long. It is long and relatively soft, and it is not an easy task to install it stably and quickly inside the power battery.

Utility model content

The purpose of the utility model is to provide a circuit board assembly that can be quickly positioned inside the battery and a battery with the circuit board assembly.

The utility model provides a circuit board assembly, comprising the following components:

Acquisition harness board;

An insulating positioning member is fixedly connected to the collecting harness board, and the insulating positioning member includes a positioning structure, which is used for positioning and installing with the cells of the battery pack, so as to position the collecting harness board in the battery pack the installation location.

In addition, the utility model also provides a battery pack, including several battery cells and the circuit board assembly described in any one of the above.

The circuit board assembly of the utility model is provided with an insulating positioning part, which is fixedly connected with the collection wiring harness board through the insulating positioning part, and the positioning structure provided on it can quickly locate the collection wiring harness board on the installation position, and improve the accuracy of the collection wiring harness board and the electric core. The positioning efficiency can improve the assembly efficiency of the battery pack.

Since the above-mentioned circuit board assembly already has the above technical effects, then the battery pack with the circuit board assembly should also have similar technical effects, so it will not be repeated here.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment in which two battery packs provided by the present invention are in a connected state;

FIG. 2 is a schematic diagram of an exploded structure of the first battery pack in FIG. 1;

Fig. 3 is a structural schematic diagram of the circuit board assembly shown in Fig. 1, which does not include conductive bars;

Fig. 4 is a schematic structural diagram of the insulating positioning member in Fig. 1;

Fig. 5 is a front view of the insulating positioning member shown in Fig. 4 .

The reference numerals among Fig. 1-Fig. 5 are explained as follows:

100 first battery pack; 100' second battery pack; 1 cell; 11 first pole; 12 second pole; 2 circuit board assembly; 21 acquisition circuit board; 22 conductive row; 221 first conductive row; 222 23 Insulation positioning piece; 231 First through hole; 232 Second through hole; 233 Boss; 234 Protruding part; 235 Installation groove; 236 Explosion-proof through hole; piece; 3 fixing pieces.

Detailed ways

The flat cable usually includes a plurality of data cables, and the plurality of data cables are used for transmission of different signals, and correspondingly, need to be connected with different components in the battery. The current installation of the cable is basically as follows: first estimate the approximate position of the cable, and then adjust it according to the connecting parts, resulting in relatively low installation efficiency.

In view of the above technical problems, the utility model provides a technical solution to solve the above technical problems. In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described below in conjunction with the accompanying drawings and specific examples. Further details.

The "several" mentioned in this article refers to a number with an indeterminate number, usually more than two; and when "several" is used to indicate the quantity of certain components, it does not indicate the relationship between these components in terms of quantity.

Words such as "first" and "second" mentioned in this article are only for the convenience of describing two or more structures or components with the same or similar structure and/or function, and do not represent any order and/or importance. some special limit.

Please refer to Fig. 1-Fig. 5, Fig. 1 is a schematic structural diagram of a specific embodiment in which two battery packs provided by the present invention are in a connected state; Fig. 2 is a schematic diagram of an exploded structure of the first battery pack in Fig. 1; Fig. 3 is a schematic structural diagram of the circuit board assembly shown in FIG. 1 , which does not include conductive bars; FIG. 4 is a schematic structural diagram of the insulating spacer in FIG. 1; FIG. 5 is a front view of the insulating spacer shown in FIG. 4 .

The battery pack includes a battery pack and a box (not shown in the figure), wherein the number of the battery pack is at least one, usually several (that is, two or more), and each battery pack is assembled in a series-parallel manner to form a overall. Two battery packs are shown in Fig. 1, respectively defined as a first battery pack 100 and a second battery pack 100', and the first battery pack 100 and the second battery pack 100' are connected in series. The number of battery packs in the battery and the structure of each battery pack are not limited to those described herein, and may be determined according to specific products. The box body in the utility model has an inner cavity, and each battery pack is installed and fixed inside the box body. The parameters such as the shape and material of the cabinet will not be introduced in detail in this article, and the current technology can be referred to.

Please understand with reference to FIG. 1 and FIG. 2 , the battery pack in the utility model mainly includes a battery cell 1 , a circuit board assembly 2 and a fixing member 3 .

Wherein, the number of battery cells 1 is multiple, and multiple generally refers to more than two, and the battery cells 1 are arranged side by side. The fixing part 3 is located at the end of the assembly formed by each cell 1 along the arrangement direction, and the number of the fixing part 3 can be two, which are respectively arranged at both ends of the assembly formed by each cell 1 along the arrangement direction, as shown in Figure 1 As shown in FIG. 2 , each battery cell 1 is arranged along the direction S, and two fixing members are located at both ends of all the battery cells 1 along the direction S in the battery pack. The fixing part 3 can be an end plate, of course, the fixing part 3 can also be another structure, such as a beam structure.

Each cell 1 is provided with two poles, respectively the first pole 11 and the second pole 12, one of the first pole 11 and the second pole 12 is a positive pole, and the other is a negative pole The poles, the first pole 11 and the second pole 12 are located on the top of the battery 1 , and they are respectively arranged near the two ends of the battery 1 . The circuit board assembly 2 of the present invention includes a collection wire harness board 21 , several conductive bars 22 and insulating positioning parts 23 . Wherein the acquisition harness board 21 can be a flexible printed circuit obtained by chemical etching, and of course the acquisition harness board 21 can also be a structure with a flat copper foil sandwiched between upper and lower layers of insulating foil films, and of course the acquisition harness board 21 can also be Other structures, as long as they can play the role of data transmission. The collection harness board 21 is generally a flat structure, so as to reduce space occupation.

The insulating positioning part 23 in the utility model is fixedly connected with the collecting wire harness plate 21, and the insulating positioning part 23 includes a positioning structure, and the positioning structure is used for positioning and installing with the electric core 1 of the battery pack, so as to locate the position of the collecting wire harness plate 21 in the battery pack Positioning, that is to say, the collection harness board 21 can be positioned and installed with at least one battery cell 1 through the insulating positioning member 23 . The circuit board assembly 2 may be installed with two or three or more insulating positioning members 23 for positioning and installing the collection harness board 21 . The position and quantity of the insulating positioning parts 23 can be reasonably selected according to the shape and length of the collection harness plate 21, and no specific limitation is made herein and does not prevent those skilled in the art from understanding and implementing the technical solution herein.

The insulating positioning member 23 can be made of plastic with good strength and high temperature resistance, or other insulating materials, such as ceramics.

In the present invention, the insulating positioning member 23 is supported on the top of at least one electric core 1. The insulating positioning member 23 has a through hole, and the through hole is positioned in cooperation with the pole, thereby limiting the position of the collection harness plate 21 along its length direction and width direction. That is, the through hole is the above positioning structure. The cooperating and positioning manner of the through hole and the pole is simple in structure.

The number of through holes on one insulating positioning member 23 can be one, or two or three or more, and two different implementations are given below.

In one embodiment, there is one through hole, at least two poles are located inside the through hole, and each pole can be positioned in cooperation with a corresponding inner wall of the through hole. The poles matched with the through holes may be the first pole and the second pole of the same battery cell, of course, may also be poles on two battery cells, which is not limited herein.

In this embodiment, only one through hole is processed on the insulating positioning member 23 to realize the positioning with the pole of the battery cell 1 , the structure is simple, and it is beneficial to reduce the overall weight of the battery pack.

For safety, the battery cell 1 is usually equipped with an explosion-proof valve. In the utility model, the above-mentioned through hole is positioned in conjunction with the two poles of the same battery cell. The through hole is also provided with at least one connecting rib, and each connecting rib 237 is located above the explosion-proof valve.

In this example, on the one hand, the connecting rib 237 plays a role of reinforcement, and on the other hand, it can prevent some large particles (such as a diaphragm) from spraying out and causing thermal runaway of adjacent batteries.

Please understand in conjunction with FIG. 2 , FIG. 4 and FIG. 5 , in another example, the through holes include a first through hole 231 and a second through hole 232 , which are respectively used for the two poles of the electric core located under the insulating positioning member 23 through, and the first through hole 231 and the second through hole 232 can be positioned in cooperation with the two poles of the same cell.

In this embodiment, the insulating positioning member 23 can match the width and length of the electric core 1, and is placed across the top of the electric core to form the top insulating cover plate of the electric core. The insulating positioning member 23 avoids the through hole of the pole (the first through hole) 231 and the second through hole 232) simultaneously form a positioning structure for positioning the collection harness plate 21, which simplifies the structure of the insulating positioning member 23. The use strength of the insulating positioning member 23 of this structure is relatively high.

In addition, in this embodiment, the insulating positioning member 23 is further provided with an explosion-proof through hole 236, which is located above the explosion-proof valve of the battery pack, and at least one connecting rib 237 is arranged inside the explosion-proof through hole. The functions of the connecting ribs 237 in this example are the same as those described above, and will not be repeated here.

The circuit board assembly 2 in the utility model also includes at least one temperature sensor 24, which is used to detect the temperature of at least one battery cell in the battery pack. By collecting the temperature of the battery core by the temperature sensor 24, the battery pack or battery where the battery cell is located can be known. working temperature. Specifically, the temperature sensor 24 includes a temperature collection terminal and a signal transmission terminal, the signal transmission terminal is electrically connected to and fixed to the collection harness board 21, the temperature collection terminal can collect the temperature of at least one cell 1, and the temperature sensor is fixedly installed on the insulating positioning member 23 , the insulating positioning member 23 is fixedly connected to the collection harness board 21 through the temperature sensor 24 .

In this example, the temperature sensor 24 can not only realize the temperature detection of the battery core, but also play the role of fixedly connecting the insulating positioning part 23 and the collection harness board 21, which simplifies the structure of the circuit board assembly.

The utility model finds that when the battery is fast-charging, the heat generated by the battery is relatively large, and the pole temperature is not consistent with the battery temperature, so this paper further sets the temperature sensor 24 as follows.

In the present invention, the temperature collecting end of the temperature sensor 24 can be abutted against or set opposite to the upper cover plate of the electric core, so as to collect the temperature of the upper cover plate of the corresponding electric core. Compared with measuring the pole temperature of the electric core, the temperature sensor 24 in the utility model has higher accuracy in measuring the temperature of the upper cover plate of the electric core.

Wherein the number of temperature sensors 24 is at least two, each temperature sensor 24 is arranged at intervals along the length direction of the collection harness board 21, the length direction of the collection harness board 21 is the S direction in Figure 1, and the width direction of the corresponding collection harness board 21 is the direction perpendicular to S in the horizontal plane. In one example, the temperature sensor 24 is installed on the insulating positioning part 23 , that is, the insulating positioning part 23 is provided with a mounting structure for the temperature sensor 24 . A temperature sensor 24 may be arranged on an insulating positioning member 23 .

The insulating positioning member 23 is formed with a protruding raised portion 233 on the side away from the battery pack. The raised portion 234 is provided with a mounting groove 235. The temperature sensor 24 is at least partially fixed inside the mounting groove 235, and the signal transmission end is connected to the mounting groove 235 It protrudes to connect to the collection harness board 21 , and the installation structure is an installation groove 235 .

It is more reliable to fix the temperature sensor 24 in the way of installing groove 235 .

The interior of the installation groove 235 is also filled with a glue structure, and the temperature sensor 24 is further fixedly connected with the installation groove 235 through the glue structure, which can improve the fixing reliability of the temperature sensor 24 and the means are simple.

The initial state of the adhesive structure can be a liquid adhesive, or a structural adhesive whose initial state is solid, such as a thermally conductive structural adhesive. Of course, the adhesive structure can also be other forms of adhesive. It is installed in the installation groove 235 by dispensing or filling or smearing or bonding.

The circuit board assembly of the present utility model also includes a conductive row 22 for electrical connection between two adjacent poles. The conductive row 22 is electrically connected to the collection harness board 21; please refer to FIG. 3 , the conductive row is connected to the collection harness board 21 through a connector 25, and the two can be fixed by hot-pressed film or injection molded parts. In the utility model, the conductive rows on the collection wiring harness board 21 can be relatively independent, and the number of conductive rows can be flexibly configured according to the number of batteries in the product, thereby saving battery costs, and the circuit board assembly 2 in the utility model is provided with insulation The positioning part 23 can quickly position the collection harness board 21 on the battery cell through the insulating positioning part 23, so as to realize the positioning efficiency of the collection harness board 21 and the battery cell, thereby improving the assembly efficiency of the battery.

An insulating positioning piece 23 is arranged between at least one conductive bar 22 and the battery core 1 , and the insulating positioning piece 23 is clamped between the conductive bar 22 and the battery core 1 . Several pairs of conductive bars 22 are electrically connected to both sides of the collection harness board 21 along its length direction. In this paper, the two conductive bars connecting the two poles of the same cell 1 are referred to as a pair of conductive bars. Each pair of conductive bars includes a first conductive bar 221 and a second conductive bar 222, which are respectively located on both sides of the collection harness board and electrically connected to two poles of the same cell. The conductive bars on both sides of the collection harness board 21 are respectively electrically connected to the first pole and the second pole of each cell. The main function of the conductive bar is to realize the series-parallel connection between the cells, and the material of the conductive bar 22 can be copper, aluminum or copper-aluminum composite material.

In this example, the insulating positioning member 23 is pressed against the battery cell 1 through the conductive row 22 , no other fixing member is needed, and the structure is relatively simple.

The insulating positioning member can be a plate structure, located under a pair of conductive bars on both sides of the same cell, that is, an insulating positioning member 23 is provided between at least one pair of conductive bars and the cell. In this example, the insulating positioning part 23 is installed between the conductive row and the battery core, so that the insulating positioning part 23 can support the conductive row to a certain extent, and can also play a role in strengthening the structure of the battery core, reducing the impact on other components of the battery. Occupying space, the structure is relatively compact.

In the present invention, the side of the insulating positioning member 23 facing the conductive row is also provided with a supporting structure. When the conductive row 22 and the pole are in a welding and fixed state, the conductive row is at least partially supported by the supporting structure. The figure shows a specific example in which the insulating positioning member 23 is partially provided with a supporting structure. The first conductive row and the second conductive row are only partially supported by the supporting structure below them, which can reduce the weight of the insulating positioning member.

There are many forms of the support structure, for example, the boss 233 shown in the figure, the boss can be a strip structure, a dot structure or other structures.

The upper surface of the boss 233 is lower than the upper surface of the pole to avoid affecting the connection between the pole and the conductive row 22 .

Of course, the opposite surfaces of the conductive row and the insulating positioning member 23 may also be in face-to-face contact, the contact area of the two is relatively large, and the supporting capacity is relatively good.

Since the above-mentioned circuit board assembly 2 already has the above technical effects, the battery with the circuit board assembly 2 should also have similar technical effects, so it will not be repeated here.

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made. It should be regarded as the protection scope of the present utility model.

Claims (16)

1. A circuit board assembly, characterized in that it comprises the following components: Acquisition harness board; An insulating positioning member is fixedly connected to the collecting harness board, and the insulating positioning member includes a positioning structure, which is used for positioning and installing with the cells of the battery pack, so as to position the collecting harness board in the battery pack the installation location. 2. The circuit board assembly according to claim 1, wherein the insulating positioning member is supported on the top of at least one of the electric cores, the insulating positioning member has a through hole, and the through hole is matched with the pole Positioning; the positioning structure is the through hole. 3. The circuit board assembly according to claim 2, wherein the number of said through holes is one, and at least two poles of said electric cores are located inside said through holes and correspond to said through holes. The inner wall fits into position. 4. The circuit board assembly according to claim 3, wherein the through hole is positioned in cooperation with two poles of the same cell, the through hole is also provided with at least one connecting rib, each of the connecting ribs It is located above the explosion-proof valve of the battery cell in the battery pack. 5 . The circuit board assembly according to claim 2 , wherein the through holes include a first through hole and a second through hole, which are respectively used for supplying the two poles of the electric core located under the insulating positioning member. The posts pass through, and the first through hole and the second through hole can be respectively positioned in cooperation with the two pole posts. 6. The circuit board assembly according to claim 5, wherein the insulating positioning member is also provided with an explosion-proof through hole, the explosion-proof through-hole is located above the explosion-proof valve of the battery pack, and the explosion-proof through-hole At least one connecting rib is arranged inside the hole. 7. The circuit board assembly according to claim 1, further comprising at least one temperature sensor, said temperature sensor comprising a temperature acquisition end and a signal transmission end, said temperature acquisition end being able to acquire the temperature of said electric core , the signal transmission end is connected and fixed to the collection harness board, the temperature sensor is fixedly installed on the insulating positioning part, and the insulating positioning part is fixedly connected to the collection wiring harness board through the temperature sensor. 8 . The circuit board assembly according to claim 7 , wherein the insulating positioning member is formed with a protruding protruding part on a side away from the battery pack, and the protruding part is provided with a mounting groove, The temperature sensor is at least partly fixed inside the installation slot, and the signal transmission end protrudes from the installation slot to connect with the collection harness board. 9 . The circuit board assembly according to claim 8 , wherein the inside of the installation groove further has a glue structure, and the temperature sensor is further fixedly connected to the installation groove through the glue structure. 10. The circuit board assembly according to claim 7, wherein the temperature collecting end of the temperature sensor is abutted against or opposite to the upper cover plate of the battery cell, so as to collect the temperature corresponding to the upper cover plate of the battery core. temperature. 11. The circuit board assembly according to claim 7, wherein the number of the temperature sensors is at least two, and each of the temperature sensors is arranged at intervals along the length direction of the collection harness board. 12. The circuit board assembly according to any one of claims 2 to 7, further comprising a conductive row for electrically connecting adjacent two poles, and the conductive row is electrically connected to the collection harness board; The insulating positioning part is arranged between at least one of the conductive bars and the electric core, and the insulating positioning part is clamped between the conductive bar and the electric core. 13 . The circuit board assembly according to claim 12 , wherein the insulating positioning member is a plate-shaped structure and is located below a pair of conductive bars of the same battery core. 14 . 14. The circuit board assembly according to claim 13, characterized in that, the side of the insulating positioning member facing the conductive row is provided with a boss at a position opposite to the conductive row, and the conductive row is supported on its below the boss. 15. The circuit board assembly according to claim 14, wherein the upper surface of the boss is lower than the upper surface of the pole. 16. A battery pack, characterized by comprising several battery cells and the circuit board assembly according to any one of claims 1 to 15.

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