CN217214998U

CN217214998U - Battery package and vehicle

Info

Publication number: CN217214998U
Application number: CN202220709718.8U
Authority: CN
Inventors: 吴静涛; 陈晨; 刘大昌
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-08-16
Anticipated expiration: 2032-03-29

Abstract

The utility model provides a battery package and vehicle. The battery pack comprises a battery shell, a blade cell, a fuse and an explosion-proof valve, wherein the battery shell is pre-embedded with a lead, and the battery shell is provided with an accommodating cavity; the blade electric core is positioned in the accommodating cavity, and a positive electrode column of the blade electric core is connected with one end of the lead wire so as to enable the battery shell to be positively charged; the fuse is arranged in the lead and used for disconnecting the circuit when the blade battery core is in short circuit; the explosion-proof valve is connected with the battery shell and used for releasing the pressure in the accommodating cavity when the pressure in the accommodating cavity is greater than a pressure threshold value. The lead is embedded in the battery shell, and the blade battery core is connected with the lead when being installed in the containing cavity of the battery shell, so that the battery shell is positively charged, and the explosion-proof valve is prevented from being subjected to electrochemical corrosion caused by electrolyte in the blade battery core; and need not external lead wire on battery case, the equipment of the blade electricity core of being convenient for.

Description

Battery package and vehicle

Technical Field

The utility model relates to a power battery technical field especially relates to a battery package and a vehicle.

Background

With the development of lithium battery technology, in order to increase the energy density of lithium battery packs, blade cells have emerged. For the assembly process of the blade electric core, after the procedure of assembling the blade electric core into the battery box is completed, an FPC (Flexible Printed Circuit) needs to be welded at the positive electrode of the electric core, and the connecting sheet between the blade electric cores at the electric core polar column is overlapped with the positive electrode cover plate of the blade electric core, so that the positive electricity of the shell is realized. However, since an FPC needs to be externally arranged at one end of the blade electric core and welded with the electric core pole position connecting sheet, if a scheme that the blade electric core is welded after entering the battery box body is adopted, welding space needs to be reserved in the battery box body by welding of the FPC, and limitation is brought to structural design of Pack (battery assembly) levels.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made in order to provide a battery pack and a vehicle that overcome or at least partially solve the above problems.

In a first aspect of the present invention, an embodiment of the present invention provides a battery pack, including:

the battery shell is pre-embedded with a lead and is provided with an accommodating cavity;

the blade electric core is positioned in the accommodating cavity, and a positive electrode column of the blade electric core is connected with one end of the lead wire so as to enable the battery shell to be positively charged;

the fuse is arranged in the lead and used for disconnecting a circuit when the blade battery core is in short circuit;

the explosion-proof valve is connected with the battery shell and used for releasing the pressure in the accommodating cavity when the pressure in the accommodating cavity is greater than a pressure threshold value.

Optionally, the battery case includes:

and the positive battery cover plate is arranged on one side of the positive electrode column, and the lead is embedded in the positive battery cover plate.

Optionally, the battery case includes:

and the negative electrode battery cover plate is arranged on one side of the negative electrode column of the blade battery cell, and the lead is embedded in the negative electrode battery cover plate.

Optionally, a groove structure is arranged on a side surface of the battery shell, which is close to the blade electric core, and the fuse is embedded in the groove structure.

Optionally, a pre-buried area is disposed on a side surface of the battery case away from the blade electric core,

the fuse is attached to the embedded area.

Optionally, the battery case is made of an aluminum alloy material.

Optionally, the lead is a flexible circuit board.

Optionally, the fuse is a chip-on-chip type, and the fuse is soldered in the flexible circuit board.

Optionally, the battery pack further includes:

and the sampling line is connected with the negative electrode column of the blade battery cell.

In a second aspect of the present invention, an embodiment of the present invention provides a vehicle, including the battery pack as described above.

The utility model discloses an each embodiment can realize one in the following advantage at least: the battery shell is positively charged, so that the explosion-proof valve connected with the battery shell is also positively charged, the explosion-proof valve is prevented from undergoing redox reaction with electrolyte inside the blade electric core, the situation that the electrolyte inside the blade electric core corrodes the explosion-proof valve is avoided, the explosion-proof valve can be normally opened, and the use safety of the battery pack is improved.

Furthermore, the lead is embedded in the battery shell, the blade electric core can be connected with the lead when being installed on the battery shell, the external lead is not needed to be welded with the blade electric core, and the installation reserved space is not needed to be increased in the assembling process of the blade electric core. And the blade electric core can independently be packed into the box of battery package, need not that the blade electric core is external to pile up the back repacking, the equipment of the blade electric core of being convenient for.

Furthermore, the fuse is arranged in the lead wire, when the blade electric core is in short circuit, the circuit can be disconnected, and the situation that the battery pack is on fire due to the fact that the blade electric core is short-circuited is avoided.

Drawings

Fig. 1 is a structural view of a battery pack according to the present invention;

fig. 2 is an exemplary diagram of a groove structure of the present invention;

fig. 3 is an exemplary view of another groove structure of the present invention;

fig. 4 is a structural view of another battery pack according to the present invention.

Description of reference numerals:

100-blade electric core, 110-positive electrode column and 120-negative electrode column;

200-battery shell, 210-lead, 211-fuse, 220-positive battery cover plate, 230-groove structure, 240-negative battery cover plate;

300-an explosion-proof valve;

400-sampling line.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, the structure diagram of a battery pack of the present invention is shown, and the battery pack of the present invention specifically includes: a battery case 200, a blade cell 100, a fuse 211, and an explosion-proof valve 300.

The battery case 200 is provided with a receiving cavity for placing the blade battery cell 100. The battery case 200 is embedded with a lead 210, one end of the lead 210 is directly connected to the battery case 200 through a fuse 211, and the other end is exposed in the accommodating cavity.

Further, in order to improve the safety of the battery pack, the battery case 200 may be made of an aluminum alloy material. For the manufacturing process of the battery shell 200, a mold matched with the shape can be adopted for integral punch forming; the aluminum alloy plate may be cut to obtain a plurality of portions of the battery case 200, and then the portions may be integrally welded, which is not limited.

The blade battery cores 100 are sequentially placed into the accommodating cavities according to a specific arrangement order, so that one side of the battery pack is a positive electrode, and the other side of the battery pack is a negative electrode. After the blade battery cell 100 is placed, the positive electrode column 110 of the blade battery cell 100 is in contact with the position where the lead 210 is exposed in the accommodating cavity, and the positive electrode column 110 of the blade battery cell 100 is connected with the lead 210. One end of the lead 210 is connected to the blade electric core 100, and the other end is connected to the battery case 200; that is, the blade battery cells 100 and the battery case 200 are communicated through the lead 210, and the battery case 200 is positively charged. Furthermore, when a plurality of blade battery cells 100 are placed in one battery case 200, a corresponding number of branch leads 210 may be connected to each blade battery cell 100, and connected in parallel to one main lead 210; it is also possible to use a main lead 210, the main lead 210 having a plurality of contacts on the receiving chamber, each blade battery cell 100 being connected to one of the contacts, so that all blade battery cells 100 can be connected to the lead 210.

A fuse 211 is arranged in the lead 210, and when the blade electric core 100 is short-circuited with the case due to abnormal conditions such as puncture collision, the current passing through the fuse 211 is too large, the fuse 211 is disconnected inside, so that the circuit between the blade electric core 100 and the battery case 200 is disconnected, and fire caused by short circuit of the whole battery pack is avoided. It should be noted that, when a plurality of branch leads 210 are disposed in one battery case 200 and are finally connected to the main lead 210 in parallel, the fuse 211 should be disposed on the main lead 210, so that one blade battery cell 100 among the plurality of blade battery cells 100 is shorted, the circuit between the battery case 200 and the blade battery cell 100 may be broken, and the battery case 200 is not charged.

The explosion proof valve 300 may vertically penetrate one of the side surfaces of the battery case 200 such that the explosion proof valve 300 is coupled to the battery case 200. It should be noted that the joint between the explosion-proof valve 300 and the battery case 200 needs to ensure airtightness to prevent gas in the accommodating chamber from leaking from the joint. When the blade battery core 100 is out of thermal runaway, the blade battery core 100 releases gas, and the pressure in the accommodating cavity continuously rises. When the pressure in the accommodating cavity is greater than the pressure threshold value, the explosion-proof valve 300 is opened, the gas in the accommodating cavity can be released to the outside of the battery pack, the pressure in the accommodating cavity is released accordingly, and the battery pack is prevented from exploding. The pressure threshold is determined by the structure of the explosion-proof valve 300, and a person skilled in the art can determine a specific pressure threshold by selecting different explosion-proof valves 300.

In an embodiment of the present invention, the battery case 200 includes the positive electrode battery cover 220, the positive electrode battery cover 220 is located at one side of the battery case 200 close to the positive electrode pillar 110 of the blade electric core 100, and the lead 210 can be pre-embedded in the positive electrode battery cover 220. The pre-buried position can be in anodal battery apron 220 upper portion, also can be in anodal battery apron 220 lower part, the embodiment of the utility model provides a do not do specific limit to this. Further, in order to protect the lead 210 and the inner fuse 211, the lead 210 may be pre-buried at a side of the positive battery cover plate 220 close to the receiving cavity. In addition, since the fuse 211 is built in the lead 210, that is, the fuse 211 is also embedded in the positive electrode cell cover 220. As shown in fig. 1, the fuse 211 and the lead 210 are embedded in the upper portion of the positive battery cover plate 220, near one side of the receiving cavity. The material and shape of the positive electrode cell cover 220 match those of the cell case 200. The connection mode of the battery cover plate and the battery shell 200 body can be welding and adhesive fixed connection; also can be screw thread, draw-in groove etc. can dismantle the connection, the embodiment of the utility model does not limit.

In an embodiment of the present invention, a groove structure 230 is disposed on a side of the battery case 200 close to the blade electric core 100, and the fuse 211 is pre-embedded in the groove structure 230.

In practical applications, the groove structure 230 is disposed on a side of the battery case 200 close to the blade cell 100, that is, the groove structure 230 is disposed on an inner side of the battery case 200. The number of the groove structures 230 is matched with the number of the fuses 211, for example, one fuse 211 corresponds to one groove structure 230, or a plurality of fuses 211 correspond to one groove structure 230. The fuse 211 is embedded in the groove structure 230 so that the fuse 211 does not need to overlap the wires outside the battery case 200. And the fuse 211 is pre-embedded in the groove structure 230, and no subsequent installation position is required to be reserved for the blade electric core 100 when the blade electric core is installed, so that the whole battery pack is more compact. The position of the groove structure 230 may be on the side of the battery case 200 close to the negative electrode column 120, on the side of the battery case 200 close to the positive electrode column 110, or on the upper and lower side surfaces of the battery case 200. Those skilled in the art can select a suitable position to arrange the groove structure 230 according to requirements.

For the groove structure 230, the groove depth of the groove structure 230 may be the same as the height of the fuse 211, and after the fuse 211 is pre-embedded in the groove structure 230, the surface of the fuse 211 is flush with the groove structure 230. As can be seen in fig. 2, a groove structure 230 is provided on the side of the battery case 200, and the depth of the groove structure 230 is the same as the height of the fuse 211. The groove depth of the groove structure 230 may also be smaller than the height of the fuse 211, such that the fuse 211 is semi-embedded in the groove structure 230. As shown in fig. 3, a groove structure 230 is provided on a side surface of the battery case 200, the groove structure 230 has a depth smaller than a height of the fuse 211, a portion of the fuse 211 protrudes from a surface of the groove structure 230, and the fuse 211 is semi-embedded in the groove structure 230. The groove depth of the groove structure 230 may also be greater than the height of the fuse 211, such that the fuse 211 is completely buried in the groove structure 230.

In an embodiment of the present invention, a pre-buried region may be provided on the side of the battery case 200 away from the blade electric core 100, that is, a pre-buried region is provided on the outer side of the battery case 200. The pre-buried region is a region for placing the fuse 211 on the side of the battery case 200. The fuse 211 may be mounted on the embedded region in a mounting manner, so that the fuse 211 is connected to the battery case 200. Moreover, the fuse 211 is attached to the outer side surface, so that the fuse can be directly replaced without disassembling the battery pack when the fuse 211 needs to be replaced, and the maintenance convenience of the battery pack is improved.

In an embodiment of the present invention, the lead 210 is a flexible circuit board.

In practical applications, the lead 210 may specifically adopt a flexible circuit board, so that the lead 210 occupies a smaller volume in the battery case 200, and the structural strength of the battery case 200 is higher.

Further, the fuse 211 may be a chip package type, and the present invention is not limited to a specific package type. Such as 0603, 0805, 1206, etc. The fuse 211 is soldered in the flexible circuit board by means of soldering, so that the lead 210 and the fuse 211 can be integrated in the flexible circuit board, so that the space of the battery case 200 can be further optimized.

In an embodiment of the present invention, the battery pack further includes: a line 400 is sampled. The sampling line 400 is connected to the negative electrode pillar 120 of the blade cell 100, and may be performed on one side of the negative electrode pillar 120 of the blade cell 100 when the blade cell 100 is sampled. Specifically, one of the two stylus gauges is in contact with the sampling line 400, and the other stylus gauge is in contact with the battery case 200, so that sampling can be completed; improved ease of sampling.

The embodiment of the utility model provides a through battery case 200 positive electricity for the same positive electricity of explosion-proof valve 300 of being connected with battery case 200 prevents explosion-proof valve 300 and the inside electrolyte of blade electricity core 100 to take place redox reaction, and the condition of avoiding the inside electrolyte of blade electricity core 100 to corrode explosion-proof valve 300 takes place, guarantees that explosion-proof valve 300 can normally open, improves the safety in utilization of battery package. The lead 210 is embedded in the battery case 200, and the blade battery core 100 can be connected to the lead 210 when being mounted to the battery case 200, without welding the external lead 210 to the blade battery core 100, and without increasing a mounting space in the assembly process of the blade battery core 100. And the blade battery cells 100 can be independently installed in the box of the battery pack, and the blade battery cells 100 are not required to be externally stacked and then installed, so that the assembly of the blade battery cells 100 is facilitated. The fuse 211 is arranged in the lead 210, and when the blade electric core 100 is short-circuited, the circuit can be cut off, so that the situation that the battery pack is on fire due to the short circuit of the blade electric core 100 is avoided.

Referring to fig. 4, there is shown a construction diagram of another battery pack of the present invention, the battery pack in practice of the present invention specifically includes: lead 210, battery case 200, blade cell 100, fuse 211, and explosion-proof valve 300.

The battery housing 200 has a receiving chamber, in which the blade cells 100 are placed.

A lead 210 and a fuse 211 are embedded in the battery case 200, the positive electrode column 110 of the blade electric core 100 is connected to the lead 210, and the lead 210 is communicated with the battery case 200 through the fuse 211, so that the battery case 200 is positively charged.

Further, the battery case 200 may include a negative battery cover 240 installed at a negative electrode side of the blade battery cell 100, and the fuse 211 is embedded in the negative battery cover 240.

The explosion-proof valve 300 is used for opening when the blade electric core 100 is out of control due to heat, so as to release the pressure in the battery pack and prevent the battery pack from exploding. Further, the explosion-proof valve 300 may be installed on the negative electrode battery cover 240, so that parts of the battery pack that need to be replaced are concentrated on the negative electrode battery cover 240, and when the parts need to be replaced, the parts can be quickly replaced by replacing the negative electrode battery cover 240.

The embodiment of the utility model provides an embodiment is electrified the battery case and is positively charged to prevent explosion-proof valve 300 and the inside electrolyte of blade electricity core 100 to take place redox reaction, avoid the inside electrolyte of blade electricity core 100 to corrode the condition emergence of explosion-proof valve 300, guarantee that explosion-proof valve 300 can normally open, improve the safety in utilization of battery package. And the fuse 211 and the explosion-proof valve 300 can be concentrated on the negative electrode battery cover plate 240, and when the parts need to be replaced, the negative electrode battery cover plate 240 can be directly replaced, so that the maintenance convenience is improved.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is made on the battery pack and the vehicle provided by the present invention, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A battery pack, comprising:

2. The battery pack of claim 1, wherein the battery housing comprises:

3. The battery pack of claim 1, wherein the battery housing comprises:

4. The battery pack according to any one of claims 1 to 3, wherein a groove structure is provided on a side surface of the battery case close to the blade electric core, and the fuse is embedded in the groove structure.

5. The battery pack according to any one of claims 1 to 3, wherein a pre-buried region is provided on a side of the battery housing facing away from the blade cells,

the fuse is attached to the embedded area.

6. The battery pack according to any one of claims 1 to 3, wherein the battery case is made of an aluminum alloy material.

7. The battery pack according to any one of claims 1 to 3, wherein the lead is a flexible circuit board.

8. The battery pack of claim 7, wherein the fuse is in a chip-on-package type, the fuse being soldered into the flexible circuit board.

9. The battery pack according to any one of claims 1 to 3, characterized in that the battery pack further comprises:

10. A vehicle, characterized by comprising: the battery pack according to any one of claims 1 to 9.