CN220066050U - Battery cell - Google Patents

Abstract

The utility model discloses a battery, which comprises a battery box, a battery module, a busbar and a sampling assembly, wherein the battery module, the busbar and the sampling assembly are arranged in the battery box; the battery module comprises a plurality of battery monomers; the plurality of buses are used for electrically connecting two adjacent battery cells; the sampling assembly includes a sampling strip and a slave plate, the sampling strip for electrically connecting the slave plate with a plurality of bus bars. Through setting up sampling strip and gathering and transmitting battery module's data signal for from the board can miniaturized design, and unified specification, simultaneously, effectively improved from the compatibility of board, reduced the assembly degree of difficulty and manufacturing cost, in addition, sampling strip can also improve from the connection stability between board and the busbar.

Description

Battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery.

Background

The current development trend of the power battery system is that structural components and electric components are gradually simplified and reduced, the requirements of the whole package on volume grouping efficiency and charging capacity are higher and higher, sufficient space cannot be reserved for arrangement of electric components such as wire harnesses in the battery package, and the trend of harness removal of the electric power is more and more obvious; the more widely the blade cell application of present, the blade module adopts integrated slave board design, can realize gathering the very big reduction of pencil, and then this scheme uses more and more.

In the prior art, the battery cells are directly connected with a Battery Management System (BMS) slave board, the BMS slave board is longer in length, different battery cell serial number modules cannot be compatible, and the slave board cannot be unified and generalized in specification.

The nickel piece and the electric core one-to-one direct welding of current BMS slave plate, when electric core clearance and electric core thickness change, follow the board and also need the adjustment of matching again, the nickel piece that BMS slave plate stretched out is hard connection with electric core and busbar moreover, is difficult laminating during the welding, and the welding degree of difficulty is big, and under vibration state, nickel piece and PCB (circuit board) soldering position have the risk of taking place to open the virtual joint.

When current BMS is from board integrated design, BMS is from board in order to reserve exhaust space for the electric core, need erect in busbar and explosion-proof valve top, this can lead to the width extension of module, leads to the width increase of battery package, occupies too much space.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a battery which can improve the utilization rate of the internal space of the battery, improve the compatibility of a BMS slave plate, improve the universality of the BMS slave plate and ensure the connection stability between the BMS slave plate and an electric core.

The battery comprises a battery box, a battery module, a busbar and a sampling assembly, wherein the battery module, the busbar and the sampling assembly are installed in the battery box; the battery module comprises a plurality of battery monomers; the plurality of buses are used for electrically connecting two adjacent battery cells; the sampling assembly includes a sampling strip and a slave plate, the sampling strip for electrically connecting the slave plate with a plurality of bus bars.

According to the battery provided by the embodiment of the utility model, the sampling strip is arranged to collect and transmit the data signals of the battery module, so that the slave plate can be miniaturized in design and unified in specification, meanwhile, the compatibility of the slave plate is effectively improved, the assembly difficulty and the production cost are reduced, and in addition, the connection stability between the slave plate and the busbar can be improved by the sampling strip.

In addition, the battery according to the present utility model may have the following additional technical features:

in some embodiments, in the length direction of the battery box, the battery module has a first end face and a second end face opposite to each other, on the first end face or the second end face, two adjacent battery cell posts are a positive post and a negative post, the busbar is used for electrically connecting two adjacent battery cell positive posts and negative posts, the sampling strip is used for electrically connecting with a plurality of the busbars of the first end face, the sampling assembly further comprises a transfer strip electrically connected with the slave plate, and the transfer strip is used for electrically connecting with a plurality of the busbars of the second end face.

In some embodiments, the sampling strip, the slave plate, and the transfer strip are all located at the first end face, and the sampling assembly further comprises an electrical connector that electrically connects the transfer strip and the plurality of the buss bars of the second end face.

In some embodiments, the plurality of electrical connectors are provided in a one-to-one correspondence with the plurality of bus bars of the second end face.

In some embodiments, the battery further comprises an insulating plate located at the first end face, and the sampling strip, the slave plate and the transfer strip are located at a side face of the insulating plate facing away from the battery module.

In some embodiments, the busbar on the first end face is located on a side face of the insulating plate, which faces away from the battery module, and a through hole is formed in the insulating plate, and the busbar on the first end face is electrically connected with the battery cell through the through hole.

In some embodiments, the insulating plate is a plastic plate.

In some embodiments, the plurality of bus bars at the first end face are bus bar assemblies sequentially arranged along the width direction of the battery box, the sampling bars extend along the width direction, and the plurality of bus bars of the bus bar assemblies are electrically connected with the sampling bars.

In some embodiments, the length of the slave plate is less than the length of the sampling strip in the width direction and is mounted in the middle of the sampling strip.

In some embodiments, the explosion protection valve of each of the battery cells is oriented toward the bottom wall of the battery case.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is an assembly view of a battery (first view angle) according to an embodiment of the present utility model;

fig. 2 is an assembly view of a battery (second view angle) according to an embodiment of the present utility model;

fig. 3 is an assembly view of a collection assembly, a bus bar, and an insulating plate of a battery according to an embodiment of the present utility model;

fig. 4 is an assembly view of a collection assembly (except for electrical connectors) of a battery according to an embodiment of the utility model;

fig. 5 is an assembly view of a bus bar and an electrical connector of a battery according to an embodiment of the present utility model.

Reference numerals:

100. a battery;

1. a battery module; 2. a busbar;

3. a sampling assembly; 31. a slave plate; 32. sampling a sample bar; 33. a transfer strip; 34. an electrical connection;

4. an insulating plate.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly 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; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

A battery 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 5.

As shown in fig. 1 to 5, a battery 100 according to an embodiment of the present utility model includes a battery case and a battery module 1, a bus bar 2, and a sampling assembly 3 installed in the battery case; the battery module 1 includes a plurality of battery cells; the bus bars 2 are provided in plurality, and the plurality of bus bars 2 are used for electrically connecting two adjacent battery cells; the sampling assembly 3 comprises a sampling strip 32 and a slave plate 31, the sampling strip 32 being used to electrically connect the slave plate 31 with the plurality of busbars 2. In this embodiment, the sampling assembly 3 is used for collecting information such as voltage and temperature of the battery module 1, and transmitting the collected information to a BMS (battery management system); the sampling bar 32 is directly electrically connected with the bus bar 2, the sampling bar 32 can collect data signals of the battery module 1 through the bus bar 2 and transmit the data signals to the slave plate 31, so that the slave plate 31 can calculate information such as voltage, temperature and the like of the battery module 1 according to the data signals.

For example, as shown in fig. 1 and 3, the slave board 31 collects the data signals of the battery module 1 through the sampling strips 32, so that the slave board 31 is not required to be designed and matched according to the size of the battery module 1, in this way, the slave board 31 can be designed in a miniaturized manner, the occupied space is reduced, and the specifications are unified, meanwhile, the compatibility of the slave board 31 is improved, and for the battery modules 1 with different specifications, the slave board 31 only needs to adjust the sampling strips 32, so that the assembly difficulty and the production cost are effectively reduced.

In this embodiment, the sampling strip 32 is a flexible circuit board, and the flexible circuit board has a better deformability, so that the connection between the sampling strip 32 and the slave plate 31 and between the sampling strip 32 and the busbar 2 is a flexible connection, and thus, when the battery 100 encounters vibration, the sampling strip 32 and the slave plate 31, the sampling strip 32 and the busbar 2 are not easy to fall off and separate, and the stability of signal transmission can be effectively ensured.

According to the battery 100 of the embodiment of the utility model, the sampling strip 32 is arranged to collect and transmit the data signals of the battery module 1, so that the slave plate 31 can be designed in a miniaturized manner and has uniform specification, meanwhile, the compatibility of the slave plate 31 is effectively improved, the assembly difficulty and the production cost are reduced, and in addition, the connection stability between the slave plate 31 and the busbar 2 can be improved by the sampling strip 32.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the battery module 1 has a first end face and a second end face opposite to each other in a length direction of the battery case, the poles of two adjacent battery cells are one positive pole and one negative pole on the first end face or the second end face, the bus bar 2 is used for electrically connecting the positive pole and the negative pole of the two adjacent battery cells, the sampling bar 32 is used for electrically connecting the plurality of bus bars 2 of the first end face, the sampling assembly 3 further includes a transfer bar 33 electrically connected with the slave plate 31, and the transfer bar 33 is used for electrically connecting the plurality of bus bars 2 of the second end face. In this embodiment, the positive and negative electrode posts of the battery cells need to be alternately placed, so that the bus bars 2 located at the same end are convenient to electrically connect the positive and negative electrode posts of two adjacent battery cells, so that a plurality of battery cells form a series connection; further, since the plurality of battery cells are connected in series, the positive electrode column of the previous battery cell is connected with the negative electrode column of the next battery cell, the output voltage of the previous battery cell is the input voltage of the next battery cell, and as such, the sampling strip 32 is used for collecting the voltage signal of the battery module 1 on the first end face, the switching strip 33 is used for collecting the voltage signal of the battery module 1 on the second end face, so that the slave board 31 calculates the voltage of the battery module 1 according to the voltage signals transmitted by the sampling strip 32 and the switching strip 33.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the sampling bar 32, the slave plate 31 and the transfer bar 33 are all located on the first end face, and the sampling assembly 3 further includes an electrical connector 34, and the electrical connector 34 electrically connects the transfer bar 33 and the plurality of bus bars 2 of the second end face. In the present embodiment, the sampling strip 32, the slave plate 31 and the transfer strip 33 are all arranged on the first end surface, so that the assembly difficulty can be reduced, and the assembly efficiency can be improved; the electrical connection 34 is capable of transmitting the voltage signal of the battery cell of the second end face to the transfer bar 33, so that the transfer bar 33 is capable of transmitting the voltage signal on the second end face to the slave plate 31.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the electrical connectors 34 are provided in a plurality, and the plurality of electrical connectors 34 are in one-to-one correspondence with the plurality of bus bars 2 on the second end surface, so that the electrical connectors 34 are convenient for collecting the voltage signals on the second end surface.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the battery 100 further includes an insulating plate 4, the insulating plate 4 being located at the first end face, and the sampling bar 32, the slave plate 31 and the transfer bar 33 being located at the side of the insulating plate 4 facing away from the battery module 1. In this embodiment, on the one hand, the insulating board 4 can provide installation space for the sampling strip 32, the slave board 31 and the transfer strip 33, so that the installation of the sampling strip 32, the slave board 31 and the transfer strip 33 is facilitated, the assembly difficulty is reduced, and the assembly efficiency is improved, and on the other hand, the insulating board 4 can also avoid the influence of interference current on the sampling strip 32, the slave board 31 and the transfer strip 33, thereby ensuring the stability of signal transmission; in addition, the insulating plate 4 can also protect the battery module 1 from the disturbance current.

In this embodiment, for example, as shown in fig. 2, an insulating plate 4 is also disposed on the second end surface, which can also serve to facilitate assembly, ensure stability of signal transmission, and protect the battery module 1.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the bus bar 2 at the first end face is located at the side of the insulating plate 4 facing away from the battery module 1, the insulating plate 4 is formed with a through-hole, and the bus bar 2 at the first end face is electrically connected to the battery cell through the through-hole. In this embodiment, busbar 2 is connected with the battery monomer electricity through the through-hole on the insulation board 4, not only can fix a position busbar 2, has made things convenient for the assembly of busbar 2, can fix insulation board 4 on first terminal surface moreover.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the insulating plate 4 is a plastic plate. The plastic plate can effectively block interference current and avoid the influence of the interference current on the sampling assembly 3 and the battery module 1.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the plurality of bus bars 2 located at the first end face are bus bar assemblies disposed in sequence in the width direction of the battery box, the sampling bar 32 extends in the width direction, and the plurality of bus bars 2 of the bus bar assemblies are electrically connected to the sampling bar 32. In this embodiment, the bus bar 2 and the sampling bar 32 are both disposed along the width direction of the battery box, so that the connection distance can be shortened, and the bus bar 2 and the sampling bar 32 can be electrically connected conveniently.

Further, in the width direction, the length of the slave plate 31 is smaller than the length of the sampling bar 32, and is installed in the middle of the sampling bar 32. As shown in fig. 3 and 4, for example, the length of the slave plate 31 is short, so that the occupation of the internal space of the battery 100 by the slave plate 31 can be reduced, thereby improving the internal space utilization of the battery 100; in addition, the slave plate 31 having a short length can be applied to the battery 100 having a narrow internal space, and the application range of the slave plate 31 is increased.

In one embodiment of the present utility model, as shown in fig. 1 to 5, the explosion-proof valve of each battery cell faces the bottom wall of the battery case. By means of the design, on one hand, the battery cell can be guaranteed to have enough exhaust space, on the other hand, interference with the sampling assembly 3 can be avoided, and the utilization rate of the internal space of the battery 100 is improved.

Other constructions and operations of the battery 100 according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

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, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery, comprising: the battery box, and the battery module, the busbar and the sampling assembly which are arranged in the battery box; the battery module comprises a plurality of battery monomers; the plurality of the buses are used for electrically connecting two adjacent battery cells;

the sampling assembly includes a sampling strip and a slave plate, the sampling strip for electrically connecting the slave plate with a plurality of the bus bars.

2. The battery according to claim 1, wherein the battery module has a first end face and a second end face opposite to each other in a length direction of the battery case, and on the first end face or the second end face, adjacent two of the battery cell poles are one positive pole and one negative pole, the bus bar is used for electrically connecting adjacent two of the battery cell positive poles and negative poles, the sampling bar is used for electrically connecting with a plurality of the bus bars of the first end face, and the sampling assembly further comprises a transfer bar electrically connected with the slave plate, the transfer bar is used for electrically connecting with a plurality of the bus bars of the second end face.

3. The battery of claim 2, wherein the sampling strip, the slave plate, and the transfer strip are all located at the first end face, the sampling assembly further comprising an electrical connection that electrically connects the transfer strip and the plurality of buss bars of the second end face.

4. The battery of claim 3, wherein a plurality of said electrical connectors are provided, a plurality of said electrical connectors being in one-to-one correspondence with a plurality of said bus bars of said second end face.

5. The battery of claim 3, further comprising an insulating plate located at the first end face, the sampling strip, the slave plate, and the transfer strip being located at a side of the insulating plate facing away from the battery module.

6. The battery according to claim 5, wherein the bus bar located at the first end face is located at a side of the insulating plate facing away from the battery module, a through hole is formed in the insulating plate, and the bus bar located at the first end face is electrically connected with the battery cell through the through hole.

7. The battery of claim 5, wherein the insulating plate is a plastic plate.

8. The battery according to claim 2, wherein the plurality of bus bars located at the first end face are bus bar assemblies arranged in the width direction of the battery box in order, the sampling bar extends in the width direction, and the plurality of bus bars of the bus bar assemblies are electrically connected with the sampling bar.

9. The battery according to claim 8, wherein the length of the slave plate is smaller than the length of the sampling strip in the width direction, and is installed in the middle of the sampling strip.

10. The battery of any one of claims 1-9, wherein the explosion-proof valve of each cell is oriented toward the bottom wall of the battery case.