CN112838302A

CN112838302A - Battery, battery module, battery pack and automobile

Info

Publication number: CN112838302A
Application number: CN201911159584.6A
Authority: CN
Inventors: 宋如; 周燕飞; 张中林; 刘彦初; 周贵树
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2021-05-25
Anticipated expiration: 2039-11-22
Also published as: CN112838302B

Abstract

The invention provides a battery, a battery module, a battery pack and an automobile, wherein the battery comprises a plurality of pole core groups, a PCB (printed circuit board) board, a cover plate and a shell, the pole core groups are sequentially connected in series along a first direction, each pole core group comprises at least one pole core, a cavity is formed in an opening at one side of the shell, the shell is matched with the cover plate and encapsulates the pole core groups in the cavity, the PCB board is arranged in the shell, and the PCB board is provided with chips. The mode that a plurality of utmost point core group establish ties has greatly reduced the project organization of battery package and arranging of battery, has utilized battery package inner space effectively, has improved space utilization. And the arrangement of the PCB board enables the structure of the battery to be more compact, saves space and improves volume energy density. The battery module has the advantages of few assembling processes, low cost, high energy density of the battery pack, high cruising ability of the automobile and low cost.

Description

Battery, battery module, battery pack and automobile

Technical Field

The invention relates to the technical field of batteries, in particular to a battery, a battery module, a battery pack and an automobile.

Background

With the continuous popularization of new energy vehicles, the use requirement of power batteries becomes higher and higher. Particularly, the mileage requirement of a user on the new energy vehicle during the continuous process is continuously improved, and the total capacity of a battery pack used by the new energy vehicle is continuously improved; meanwhile, when the power battery pack is used, internal consumption and heat generation caused by internal resistance are required to be reduced as much as possible.

Generally, only one pole core or a plurality of pole cores in parallel connection are arranged in a shell of the battery, and the voltage of the whole battery cannot be increased by containing a single pole core or a plurality of pole cores in parallel connection. For example, the voltage of a lithium titanate-based battery is 2.4 volts; the voltage of the lithium iron phosphate battery is 3.2 volts; the voltage of the ternary battery is 3.7 volts; the voltage of the multipolymer battery was 4.3 volts. Therefore, when high voltage (high capacity) is needed, a large number of batteries are connected in series to form a battery module, and then the battery module is assembled into a battery pack; two adjacent batteries need to be connected through an external connecting piece. The installation structure of the battery is more, the cost is increased, and the whole weight is increased; meanwhile, the installation structure occupies more internal space of the battery pack body, so that the overall capacity of the battery pack is reduced, and the batteries are arranged side by side more, so that the space waste is more. In addition, because of need set up a plurality of external connecting pieces and carry out power connection, lead to the internal resistance to increase, improved the internal consumption and the generate heat of battery package in use.

In order to detect the temperature, voltage and smell inside the battery pack. In the conventional battery pack, the sampling lines and the PCB are arranged between the battery modules of the battery pack or between the unit batteries of the battery modules in the battery pack. The sampling mode has the disadvantages that on one hand, the sampling temperature is not enough to be attached to the interior of the single battery, precision errors exist, short circuits are easy to occur after the sampling lines are lapped, and after the number of single batteries is increased, the number of the sampling lines is large, the sampling lines are complex, the cost is high, and safety risks are easy to occur; on the other hand, the sampling line and the PCB occupy a larger space outside the battery unit, and the energy density of the battery pack is obviously reduced.

Disclosure of Invention

The present disclosure is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a battery, a battery module, a battery pack, and an automobile.

According to a first aspect of the present invention, there is provided a battery comprising:

the pole core groups are sequentially connected in series along a first direction and comprise at least one pole core;

the shell is matched with the cover plate and encapsulates the pole core groups in the cavities;

the PCB board, the PCB board set up in the casing, be provided with the chip on the PCB board.

Optionally, the PCB board is disposed at an end of the housing close to the cover plate.

Optionally, the battery further includes a plurality of sampling lines, the plurality of sampling lines are located in the casing and are correspondingly electrically connected to the plurality of pole core groups, and the plurality of sampling lines are collected on the PCB.

Optionally, an insulating member is disposed in the housing adjacent to the cover plate, and the PCB is fixed to the insulating member.

Optionally, a plug connector is arranged on the PCB and used for connecting with an external device and outputting the information processed by the chip.

Optionally, a first through hole is formed in the cover plate, the plug connector is contained in the first through hole, and a sealing element is arranged between the first through hole and the cover plate.

Optionally, the battery further comprises a pole core connecting piece, two adjacent pole core groups are connected in series through the pole core connecting piece, and the sampling line is electrically connected with the pole core connecting piece.

Optionally, the pole piece connecting member includes a copper connecting portion and an aluminum connecting portion connected to the copper connecting portion, and the sampling line is electrically connected to the copper connecting portion.

Optionally, the pole core group includes a first electrode leading-out component and a second electrode leading-out component for leading out current, and the first electrode leading-out component and the second electrode leading-out component are respectively disposed on two opposite sides of the pole core group along the first direction.

Optionally, a protrusion is arranged on the insulating member, a second through hole is arranged on the cover plate corresponding to the protrusion, and the protrusion penetrates through the second through hole.

Optionally, the battery further includes an electrode terminal disposed on the cover plate in an insulated manner, the plurality of pole core groups at two ends of the first direction in the pole core groups are a first end pole core group and a second end pole core group respectively, one of the first end pole core group and the second end pole core group is electrically connected to the electrode terminal, and the other of the first end pole core group and the second end pole core group is electrically connected to the cover plate.

Optionally, a third through hole is formed in the cover plate, the electrode terminal is accommodated in the third through hole, and a sealing member is arranged between the electrode terminal and the cover plate.

Optionally, the sampling line is externally coated with an insulating layer.

Optionally, a temperature sensor is disposed on the sampling line.

Optionally, a sensor interface is disposed on the PCB.

Optionally, a PP bag is disposed outside the pole piece, and the PP bag is disposed in the housing.

Optionally, the battery further includes a support disposed in the casing, the support includes a frame body, the frame body has a plurality of accommodating grooves disposed at intervals, and the plurality of pole core sets are correspondingly disposed in the plurality of accommodating grooves.

Optionally, the support is an insulating support.

Optionally, the bracket further includes a positioning portion and a protruding block disposed on the frame body, the protruding block is located between two adjacent accommodating grooves, and the protruding block cooperates with the positioning portion to position the pole piece connecting member.

Optionally, the positioning portion and the protruding block are arranged on two opposite sides of the pole piece connecting piece, and the positioning portion and the protruding block are clamped and matched to position the pole piece connecting piece.

According to a second aspect of the present invention, there is provided a battery module including the battery.

According to a third aspect of the present invention, there is provided a battery pack including the battery or the battery module.

According to a fourth aspect of the present invention, there is provided an automobile including the battery module or the battery pack.

Compared with the prior art, the invention has the technical effects that:

the battery comprises a plurality of pole core groups, a PCB (printed circuit board), a cover plate and a shell, wherein the pole core groups are sequentially connected in series along a first direction, each pole core group comprises at least one pole core, a cavity is formed in an opening in one side of the shell, the shell is matched with the cover plate, the pole core groups are packaged in the cavity, the PCB is arranged in the shell, and a chip for receiving and processing internal information of the battery is arranged on the PCB.

The plurality of pole core groups connected in series are arranged in the shell of one battery, and are arranged side by side relative to the plurality of batteries, so that the shell and an external installation structure are reduced, the space utilization rate is improved, and the overall capacity of the battery pack is ensured; meanwhile, the use of external power connecting pieces is reduced, the mode that the pole core groups directly adjacent to each other in the shell are connected in series is changed, the connection stability and reliability of the power connecting pieces do not need to be considered, the internal connection resistance can be reduced, and the internal consumption of the battery pack in use is further reduced.

In addition, the PCB is arranged inside the shell, and the arrangement mode does not need to occupy the external space of the shell, so that the space utilization rate inside the battery pack is improved. In addition, the chip on the PCB can acquire and detect the information (such as current, voltage, temperature and the like) of each pole core group, so that the use condition of each pole core group can be monitored conveniently, and the safety performance of the battery in use can be improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the invention;

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

fig. 3 is a disassembled schematic view of a battery according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a battery according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the invention shown at B in FIG. 3.

Wherein: 1-pole core group; 2-an electrode lead-out member; 3-a first electrode lead-out member; 4-pole core connectors; 5-a second electrode lead-out member; 6-PCB board; 7-a scaffold; 8-an electrode terminal; 9-cover plate; 10-a housing; 11-a plug-in unit; 12-a seal; 13-sampling line; 14-pin; 15-an insulator; 16-an insulating layer; 17-a bump; 18-a positioning section; 19-a base plate; 20-chip; 21-a sensor interface; 22-a first via; 23-a second via; 24-a third via; 25-a frame body; 26-a containing groove; 27-a bump; 28-buckling; 29-card slot.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1, 2 and 3, the present invention provides a battery including:

utmost point core group 1, PCB board 6, apron 9 and casing 10, it is a plurality of utmost point core group 1 is along the first direction series connection in proper order, the first direction is the length direction of utmost point core group, utmost point core group 1 contains at least one utmost point core. A plurality of pole cores may also be included in one pole core group 1, and the plurality of pole cores in the pole core group 1 may be connected in series and/or in parallel, which is not limited in the present invention. Casing 10 one side opening formation cavity, casing 10 with apron 9 cooperation will a plurality of utmost point core group 1 encapsulates in the cavity, PCB board 6 set up in the casing 10, be provided with on the PCB board 6 and be used for receiving and handle the chip 20 of battery internal information.

In the present invention, the pole core of the pole core group 1 is a pole core commonly used in the field of power batteries, and the pole core group 1 are components inside the battery case 10, and cannot be understood as a battery itself, wherein the battery is a single battery; the pole core can be formed by winding or can be made in a lamination mode; generally, the pole core includes at least a positive pole piece, a separator, and a negative pole piece. In addition, the battery according to the present invention is an independent single battery, and cannot be simply understood as a battery module or a battery pack because the battery includes a plurality of pole pieces.

In an embodiment of the present invention, the plurality of pole-core groups 1 may be two pole-core groups 1 connected in series, or three, four, five or even more pole-core groups 1 connected in series. The specific number of the pole core groups is determined according to the actual output voltage of each pole core group 1, the width of the battery pack and the overall voltage requirement of the battery pack. For example, when the battery is applied to a vehicle type, the voltage output by a battery system is 300V, the voltage of a traditional lithium iron battery is 3.2V, and in the prior art, 100 batteries need to be connected in series in a battery pack body to meet the requirement. In the battery pack provided by the invention, if 2 pole core groups 1 are connected in series in one battery, each pole core group 1 comprises one pole core or a plurality of pole cores are connected in parallel, and the voltage of the pole core group 1 is 3.2V, only 50 batteries need to be arranged; by analogy, if 10 pole core groups 1 are connected in series in one battery, and each pole core group 1 comprises one pole core or a plurality of pole cores are connected in parallel, only 10 batteries need to be connected in series. Greatly reduces the design structure of the battery pack and the arrangement of the batteries, effectively utilizes the internal space of the battery pack and improves the space utilization rate.

More importantly, the present invention effectively utilizes the space inside the pole core assembly 1, and the PCB board 6 with the chips 20 is disposed in the vacant space inside the case 10. On one hand, the arrangement of the PCB 6 enables the structure of the battery to be more compact, saves space and improves volume energy density; on the other hand, the chip 20 of the PCB 6 can conveniently receive and detect the temperature, voltage and other information inside the battery, and accurately reflect the operation condition inside the battery.

In one embodiment of the present invention, the PCB board 6 is disposed at one end of the housing 10 near the cover plate 9. The end of the battery shell 10 close to the cover plate 9 generally needs to be connected with the leading-out part of the pole core group 1, but the leading-out part is generally linear or strip-shaped, so that a lot of space which is not fully utilized is left at the end of the shell 10 close to the cover plate 9, and the remaining space can be just utilized by arranging the PCB 6 at the end of the shell 10 close to the cover plate 9, so that the compactness of the battery structure is improved, and the monitoring function of the battery is increased.

In one embodiment of the present invention, the PCB board 6 is provided with a sensor interface 21 to which a smell sensor can be connected. Most of the batteries use a liquid electrolyte, and when the electrolyte leaks, the electrolyte is difficult to find from the appearance because the electrolyte is in the interior of the battery. Therefore, the odor sensor is arranged in the battery, so that leaked electrolyte signals can be collected quickly. The gas sensor can rapidly detect the leakage of the electrolyte in the sealed environment, and can not be interfered by external smell in normal use.

Referring to fig. 4, in an embodiment of the present invention, the battery further includes a plurality of sampling lines 13, the plurality of sampling lines 13 are located in the housing 10 and are electrically connected to the plurality of pole-core assemblies 1 correspondingly, and may be specifically connected to a connecting member, such as a lead-out component and/or a connecting member, between the plurality of pole-core assemblies 1, the plurality of sampling lines 13 are collected on the PCB 6, and the chip 20 on the PCB 6 processes the sampling information.

By arranging the sampling line 13 inside the housing 10, abrasion of the sampling line 13 can be prevented. The sampling line 13 is correspondingly electrically connected with a plurality of pole core groups 1, and the signal output by the sampling line 13 is sent to a chip 20 on the PCB 6, so that the outward transmission of the pole core groups 1 is not a high-voltage signal but a low-voltage signal, and the voltage safety of the whole battery is improved.

In one embodiment of the invention, the battery further comprises a pole core connecting piece 4, two adjacent pole core groups 1 are connected in series through the pole core connecting piece 4, and the sampling line 13 is electrically connected with the pole core connecting piece 4.

The series connection of a plurality of the pole core groups 1 can obviously improve the voltage output from the battery to the outside, and the pole core connecting piece 4 completes the series connection of the plurality of the pole core groups 1, thereby providing guarantee for the high-voltage output of the battery. And the sampling line 13 is directly and electrically connected with the pole core connecting piece 4, so that the information of voltage, current, temperature and the like at the two ends of the pole core group 1 can be accurately output externally.

In one embodiment of the present invention, the pole piece connecting member 4 includes a copper connecting portion and an aluminum connecting portion connected to the copper connecting portion, and the sampling line 13 is electrically connected to the copper connecting portion.

The pole core connecting piece 4 adopting the copper connecting part and the aluminum connecting part can directly connect two adjacent pole core groups 1 in series, and the conventional connecting piece adopts a copper connecting piece and an aluminum connecting piece to be respectively electrically connected with two adjacent pole core groups 1, and then connects a copper connecting piece and an aluminum connecting piece. The pole core connecting piece 4 compounded by the copper connecting part and the aluminum connecting part not only reduces the using amount of connecting pieces, but also increases the connecting reliability. Whereas the sampling line 13 is typically made of copper wire and is well electrically connected to said copper connection.

In one embodiment of the invention, the sampling line 13 is coated with an insulating layer 16. Since the sampling line 13 is disposed inside the housing 10, the sampling line 13 inevitably comes into contact with the conductive member inside the housing 10, thereby causing short-circuit damage to the sampling line. Therefore, in order to ensure the accuracy of signal transmission of the sampling line 13, the sampling line 13 may be covered with an insulating layer 16, and the insulating layer 16 may be made of an insulating material such as plastic or rubber.

In one embodiment of the invention, the sampling line 13 is connected with the PCB 6 through a pin 14. Since the internal information of the battery collected by the sampling line 13 needs to be transmitted to the chip 20 on the PCB 6, and the pin 14 is required for the accurate input of the signal of the chip 20 as an interface, the pin 14 is provided between the sampling line 13 and the PCB 6 to complete the preparation of the chip 20 for receiving the sampling information.

In one embodiment of the invention, a temperature sensor is arranged on the sampling line 13. When a plurality of utmost point core group 1 establish ties, because resistance difference between each utmost point core group 1, the electric current that can bring different utmost point core group 1 has certain difference with voltage, because long-term charge-discharge also can lead to the inside temperature rise of battery moreover, so with sampling line 13 be connected to the utmost point core connecting piece 4 between a plurality of utmost point core groups 1 on, voltage, electric current and the temperature variation of every utmost point core group 1 of battery inside can the quick accurate monitoring.

In one embodiment of the present invention, an insulating member 15 is provided in the housing 10 adjacent to the cover plate 9, and the PCB board 6 is fixed to the insulating member 15. The insulating part 15 is provided with a bulge 17, a second through hole 23 is arranged on the cover plate 9 corresponding to the bulge 17, and the bulge 17 is accommodated in the second through hole 23.

On one hand, the insulating member 15 can serve to isolate the pole core assembly 1 from the PCB board 6 and limit the PCB board 6 in the empty space of the housing 10; on the other hand, the protrusion 17 on the insulating member 15 is received in the second through hole 23 of the cover plate 9, and the insulating member 15 is fixed by the cooperation between the insulating member 15 and the cover plate 9. The material of insulating part 15 is one of plastics, rubber, and the material of plastics and rubber is harder, can play fine fixed action, and more importantly the insulating properties of plastics and rubber are good, can be with insulating between utmost point core group 1 and the PCB board 6.

In an embodiment of the present invention, the PCB 6 is provided with a connector 11, and the connector 11 is used for connecting with an external device and outputting information processed by the chip 20. The cover plate 9 is provided with a first through hole 22, the plug connector 11 is contained in the first through hole 22, and a sealing element 12 is arranged between the first through hole 22 and the cover plate 9.

The plug connector 11 is provided with at least two contacts. The number of the contacts may be three, four or more, the number of the contacts is determined according to the number of the collected information, and the plug-in unit 11 is used for connecting with an external device and outputting the information processed by the chip 20, including voltage information, current information, temperature information, odor information, and the like. The plug connector 11 is accommodated in the first through hole 22, so that the cover plate 9 can be utilized to fix the plug connector 11 well, and the looseness of the plug connector 11 caused by the shaking or impact of the battery is prevented. The sealing element 12 is made of an insulating material, the shape of the sealing element 12 is determined according to a gap between the plug connector 11 and the first through hole 22 of the cover plate 9, and the sealing element 12 has the functions of fixing and sealing the plug connector 11 and the cover plate 9 on one hand and insulating and isolating the plug connector 11 and the cover plate 9 on the other hand so as to prevent mutual electric signal interference.

In one embodiment of the present invention, the pole core group 1 includes an electrode leading-out part 2, the electrode leading-out part 2 includes a first electrode leading-out part 3 and a second electrode leading-out part 5 for leading out current, the first electrode leading-out part 3 and the second electrode leading-out part 5 are respectively disposed on two opposite sides of the pole core group 1 along the first direction, and the first electrode leading-out part 3 and the second electrode leading-out part 5 of adjacent pole core groups 1 are electrically connected through the pole core connecting piece 4.

Wherein, if the pole core group 1 only contains one pole core, the first electrode leading-out part 3 and the second electrode leading-out part 5 can be respectively a positive pole lug and a negative pole lug of the pole core, or respectively a negative pole lug and a positive pole lug. If the pole core group 1 comprises a plurality of pole cores, the first electrode lead-out part 3 can be a lead-out part formed by compounding and welding the positive pole ears of each pole core together, and the second electrode lead-out part 5 can be a lead-out part formed by compounding and welding the negative pole ears of each pole core together; alternatively, the first electrode lead-out member 3 may be a lead-out member formed by the negative electrode tabs of each pole core being combined and welded together, and the second electrode lead-out member 5 may be a lead-out member formed by the positive electrode tabs of each pole core being combined and welded together.

According to the invention, the first electrode leading-out part 3 and the second electrode leading-out part 5 of each pole core group 1 are positioned at the positions of two opposite ends of the pole core group 1, and then the adjacent pole core groups 1 are connected in series through the first electrode leading-out part 3, the second electrode leading-out part 5 and the pole core connecting piece 4, so that a head-to-head arrangement mode is formed, the arrangement mode can conveniently realize the two-to-two series connection between the pole core groups 1 in the battery, and the connection structure is simple. In addition, the arrangement mode can conveniently manufacture the battery with longer length.

In one embodiment of the present invention, the battery further includes an electrode terminal 8 disposed on the cover plate 9 in an insulated manner, the pole core groups 1 at two ends of the first direction in the plurality of pole core groups 1 are a first pole core group and a second pole core group respectively, one of the first pole core group and the second pole core group is electrically connected to the electrode terminal 8, and the other of the first pole core group and the second pole core group is electrically connected to the cover plate 9.

In one embodiment of the present invention, the first end pole core group may be a pole core group close to the cover plate 9, and the first electrode lead-out member 3 or the second electrode lead-out member 5 of the first end pole core group is a negative electrode lead-out member electrically connected to the electrode terminal 8. And the negative electrode leading-out component is used as the negative electrode of the whole battery and is connected with external equipment for electric energy transmission.

In an embodiment of the present invention, the second end pole core group may be a pole core group far away from the cover plate 9, the first electrode lead-out part 3 or the second electrode lead-out part 5 of the second end pole core group is a positive electrode lead-out part, the positive electrode lead-out part is electrically connected to the housing 10, and the housing 10 is electrically connected to the cover plate 9. Due to the arrangement, the cover plate 9 can be positively charged, so that a positive terminal does not need to be arranged on the cover plate 9, and the structural design of the cover plate 9 is simplified. For example, the housing 10 and the cover plate 9 are both made of metal, and the housing 10 and the cover plate 9 are hermetically connected by welding.

In an embodiment of the present invention, the casing 10 further includes a bottom plate 19, the bottom plate 19 is disposed at an end of the casing 10 opposite to the cover plate 9, the bottom plate 19 and the casing 10 may be welded or integrally formed, the first electrode lead-out member 3 or the second electrode lead-out member 5 of the end electrode core set is a positive electrode lead-out member, and the positive electrode lead-out member is electrically connected to the bottom plate 19.

The housing 10 is a metal housing, and may be metal aluminum or metal copper, and the cover plate 9 may also be made of metal aluminum or metal copper. The casing 10 and the cover plate 9 are used as the outermost protective structure of the battery, the strength of the battery can be improved by using metal, and the heat dissipation performance is good. The positive electrode lead-out member is electrically connected to the case 10 so that the cover plate 9 and the case 10 are positively charged, and the positive electrode of the entire battery is connected to an external device for power transmission.

In an embodiment of the present invention, a third through hole 24 is formed in the cover plate 9, the electrode terminal 8 is accommodated in the third through hole 24, and a sealing member 12 is disposed between the electrode terminal 8 and the cover plate 9.

The electrode terminal 8 is accommodated in the third through hole 24, so that the cover plate 9 can be used for fixing the electrode terminal 8 well, and the looseness of the electrode terminal 8 caused by the shaking or impact of the battery is prevented. The sealing member 12 is made of an insulating material, the shape of the sealing member 12 is determined according to a gap between the electrode terminal 8 and the third through hole 24 of the cap plate 9, and the sealing member 12 has functions of, on one hand, fixedly sealing the electrode terminal 8 and the cap plate 9, and, on the other hand, insulating and isolating the electrode terminal 8 and the cap plate 9 to prevent mutual electrical signal interference.

In one embodiment of the invention, the pole piece is wrapped with a PP bag, which is placed inside the housing 10. The pole pieces are protected by PP bags while insulating the individual pole pieces. The pole cores wrapped by the PP bags form the pole core group 1, and the pole core groups 1 are connected in series into a battery, so that high-voltage integration is provided, and meanwhile, the safety of insulation and isolation between the pole cores is guaranteed.

In an embodiment of the present invention, the battery further includes a bracket 7 disposed in the casing 10, the bracket 7 includes a frame body 25, the frame body 25 has a plurality of accommodating grooves 26 disposed at intervals, the plurality of pole core sets 1 are correspondingly disposed in the accommodating grooves 26, the bracket 7 is an insulating bracket, and the material of the bracket 7 is one of plastic and rubber. Support 7 can utilize storage tank 26 to prevent utmost point core group 1 on the one hand and rock in casing 10 is inside, and on the other hand adopts insulating material such as plastics, rubber can keep apart between a plurality of utmost point core groups 1, avoids appearing short circuit scheduling problem between a plurality of utmost point core groups 1, has improved battery overall structure's stability and security.

In an embodiment of the present invention, referring to fig. 5, the bracket 7 further includes a positioning portion 18 and a protrusion 27 disposed on the frame body 25, the protrusion 27 is located between two adjacent receiving grooves 26, and the protrusion 27 cooperates with the positioning portion 18 to position the pole piece connecting member 4.

Furthermore, the positioning portion 18 and the protruding block 27 are disposed on two opposite sides of the pole piece connecting piece 4, and the positioning portion 18 and the protruding block 27 are in clamping fit to position the pole piece connecting piece 4.

Specifically, one of the positioning portion 18 and the bump 27 is provided with a buckle 28, the other of the positioning portion and the bump 27 is provided with a clamping groove 29, and the buckle 28 is clamped and fixed in the clamping groove 29, so as to position the pole piece connecting piece. It should be noted that the number and the positions of the snaps 28 and the snap slots 29 are not particularly limited, and may be set according to actual needs. For example, two clamping grooves 29 are formed in the protruding block 27 at intervals along the first direction, the distance between the two clamping grooves 29 is greater than the width of the pole piece connecting piece 4 (that is, the size of the pole piece connecting piece along the first direction), two buckles 28 matched with the clamping grooves 29 are arranged on the positioning portion 18, and the buckles 28 of the positioning portion 18 are clamped and fixed in the clamping grooves 29 of the protruding block 27 to position the pole piece connecting piece 4.

Of course, the protrusion 27 and the positioning portion 18 may be engaged by a screw connection to position the pole piece connector 4.

The pole core connecting piece 4 is used as an important component for the serial connection of the pole core groups 1, the first electrode leading-out part 3 and the second electrode leading-out part 5 which are electrically connected with the pole core groups 1 are used for connecting the two adjacent pole core groups 1 in series, and the first electrode leading-out part 3 and the second electrode leading-out part 5 are generally linear or strip-shaped and have lower strength, so that the structural stability of the pole core connecting piece 4 is guaranteed to be crucial. The lug 27 cooperates with the positioning part 18 to position the pole piece connecting piece 4. Therefore, the pole core connecting piece 4 can be fixed at the position between two adjacent pole core groups 1, the displacement of the pole core connecting piece 4 is limited, and the structural stability of series connection between the pole core groups 1 is ensured.

The invention also provides a battery module which can comprise at least two batteries. At least two batteries in the battery module can be connected in series and/or in parallel, and a detection sampling component can be arranged on the battery module and used for independently supplying power to the battery module.

The invention also provides a battery pack, and the battery can comprise at least two batteries or at least two battery modules. At least two batteries or at least two battery modules in the battery pack can be connected in series and/or in parallel, and a detection sampling component can be arranged on the battery pack and used for independently supplying power to the battery pack.

The invention also provides an automobile which can comprise the battery module or the battery pack. The battery module or the battery pack can be used for independently supplying power for the automobile.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A battery, comprising:

the pole core groups (1) are sequentially connected in series along a first direction, and each pole core group (1) comprises at least one pole core;

the pole core assembly comprises a shell (10) and a cover plate (9), wherein a cavity is formed by opening one side of the shell (10), and the shell (10) is matched with the cover plate (9) and encapsulates a plurality of pole core assemblies (1) in the cavity;

PCB board (6), PCB board (6) set up in casing (10), be provided with chip (20) on PCB board (6).

2. A battery according to claim 1, characterized in that the PCB board (6) is arranged in the housing (10) near one end of the cover plate (9).

3. A battery according to claim 1, characterized in that it further comprises a plurality of sampling lines (13), said plurality of sampling lines (13) being located in said casing (10) and electrically connecting said plurality of pole core groups (1) correspondingly, said plurality of sampling lines (13) being collected on said PCB board (6).

4. A battery according to claim 3, characterized in that the sampling line (13) is coated with an insulating layer (16).

5. A battery according to claim 3, characterized in that a temperature sensor is arranged on the sampling line (13).

6. A battery according to claim 3, characterized in that the battery further comprises pole core connectors (4), two adjacent pole core groups (1) are connected in series through the pole core connectors (4), and the sampling line (13) is electrically connected with the pole core connectors (4).

7. A battery according to claim 6, characterized in that the pole piece connection (4) comprises a copper connection and an aluminum connection connected to the copper connection, the sampling line (13) being electrically connected to the copper connection.

8. A battery according to claim 1, characterized in that an insulating member (15) is provided in the case (10) adjacent to the cover plate (9), and the PCB board (6) is fixed to the insulating member (15).

9. The battery according to claim 8, wherein the insulating member (15) is provided with a protrusion (17), the cover plate (9) is provided with a second through hole (23) corresponding to the protrusion (17), and the protrusion (17) is accommodated in the second through hole (23).

10. The battery according to claim 1, characterized in that the PCB (6) is provided with a connector (11), and the connector (11) is used for connecting with an external device and outputting the information processed by the chip (20).

11. The battery according to claim 10, wherein the cover plate (9) is provided with a first through hole (22), the plug member (11) is accommodated in the first through hole (22), and a sealing member (12) is provided between the first through hole (22) and the cover plate (9).

12. The battery according to claim 1, wherein the electrode core group (1) comprises a first electrode leading-out part (3) and a second electrode leading-out part (5) for leading out current, and the first electrode leading-out part (3) and the second electrode leading-out part (5) are respectively arranged on two opposite sides of the electrode core group (1) along the first direction.

13. The battery according to claim 1, further comprising an electrode terminal (8) insulated from the cover plate (9), wherein the electrode core groups (1) at two ends of the first direction in the plurality of electrode core groups (1) are a first end electrode core group and a second end electrode core group respectively, one of the first end electrode core group and the second end electrode core group is electrically connected to the electrode terminal (8), and the other of the first end electrode core group and the second end electrode core group is electrically connected to the cover plate (9).

14. The battery according to claim 13, wherein a third through hole (24) is formed in the cap plate (9), the electrode terminal (8) is received in the third through hole (24), and a sealing member (12) is provided between the electrode terminal (8) and the cap plate (9).

15. A battery according to claim 1, characterized in that the PCB board (6) is provided with a sensor interface (21).

16. A battery according to claim 1, characterized in that a PP bag is provided outside the pole core, said PP bag being placed inside the case (10).

17. The battery according to claim 1, further comprising a bracket (7) disposed in the housing (10), wherein the bracket (7) comprises a frame body (25), the frame body (25) has a plurality of receiving slots (26) disposed at intervals, and a plurality of the pole core sets (1) are correspondingly disposed in the plurality of receiving slots (26).

18. A battery according to claim 17, characterized in that the holder (7) is an insulating holder.

19. The battery according to claim 17, wherein the bracket (7) further comprises a positioning portion (18) and a projection (27) arranged on the frame body (25), the projection (27) is located between two adjacent accommodating grooves (26), and the projection (27) is matched with the positioning portion (18) to position the pole core connecting piece (4).

20. The battery according to claim 19, wherein the positioning portion (18) and the protrusion (27) are disposed on two opposite sides of the pole piece connector (4), and the positioning portion (18) and the protrusion (27) are in snap fit to position the pole piece connector (4).

21. A battery module comprising the battery according to any one of claims 1 to 20.

22. A battery pack comprising the battery according to any one of claims 1 to 20 or the battery module according to claim 21.

23. An automobile characterized by comprising the battery module according to claim 21 or the battery pack according to claim 22.