CN221574151U - Battery Pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack. The battery pack comprises a shell, a battery module and a pressure release pipeline, wherein the battery module is arranged in the shell, the battery module comprises a plurality of electric cores, the electric cores are distributed in two rows along the length direction of the battery module, the two rows of electric cores are oppositely arranged, the pressure release plate is arranged between the two rows of electric cores, the electric cores are communicated with the pressure release plate, the pressure release pipeline is communicated with the pressure release plate, and at least one end of the pressure release pipeline extends out of the shell and is communicated with the outside atmosphere. Through the arrangement, the gas generated when the battery cell is out of control is discharged out of the battery pack through the pressure relief plate via the pressure relief pipeline, so that the safety performance of the battery pack is improved; simultaneously, two rows of electric cores are oppositely arranged, and the same pressure release plate is used together, so that the space utilization rate of the battery pack is improved.

Description

Battery pack

Technical Field

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

Background

In the technical field of batteries, a battery pack is generally used in the form of a battery module because the voltage or capacity of a single battery cell is relatively low. A battery module composed of a plurality of battery cells and a battery pack composed of a plurality of battery modules and a control system. The battery cell generates a large amount of heat due to chemical reaction in the charge and discharge process of the battery pack, and the heat can generate high-temperature and high-pressure gas in the battery cell, so that the thermal runaway of the battery module or the battery pack is caused.

Among the prior art, through setting up the release board with the gas discharge in the electric core, for example, the release board that provides in the earlier stage patent of application number 202211610189.7, every row of electric core of battery module all need set up a release board, and the release board sets up in the top of electric core to cause battery module space utilization lower, and then cause the space utilization of battery package lower.

Therefore, there is a need for a battery pack to solve the above problems.

Disclosure of utility model

The utility model aims to provide a battery pack with higher safety performance, and meanwhile, the structure of the battery pack is simplified, and the space utilization rate of the battery pack is improved.

In order to achieve the above object, the following technical scheme is provided:

a battery pack, comprising:

a housing;

The battery module is arranged in the shell and comprises a plurality of electric cores, the electric cores are distributed in two rows along the length direction of the battery module, the two rows of electric cores are oppositely arranged, a pressure release plate is arranged between the two rows of electric cores, and the electric cores are communicated with the pressure release plate;

the pressure relief pipeline is communicated with the pressure relief plate, and at least one end of the pressure relief pipeline extends out of the shell and is communicated with the outside atmosphere.

As the preferable scheme, the pressure release plate is provided with a pressure release hole, the battery cell comprises a explosion-proof hole, the explosion-proof hole is arranged at one end of the battery cell away from the pole of the battery cell, and the explosion-proof hole is communicated with the pressure release hole.

Preferably, the pressure release hole and the explosion-proof hole are sealed by sealant.

As a preferable scheme, the number of the pressure relief holes and the number of the explosion-proof holes are arranged in one-to-one correspondence, and the area of the pressure relief holes is larger than or equal to that of the explosion-proof holes.

As a preferred solution, the pressure release plate further includes:

The baffle, be hollow structure in the pressure release board, the baffle sets up in the pressure release board and extends along vertical direction.

As a preferred aspect, the battery module includes:

two end plates; and

The battery module comprises a battery module body, an end plate connecting piece, two end plates and two end plates, wherein the end plate connecting piece is respectively arranged at two ends of the battery module body along the length direction, the end plate connecting piece is arranged at two sides of the battery module body along the width direction, and the two ends of the end plate connecting piece are respectively connected with the two end plates.

As a preferable scheme, one of the end plates is provided with a through hole, one end of the pressure relief plate is provided with an exhaust pipe, and the exhaust pipe penetrates through the through hole and is communicated with the pressure relief pipeline.

As the preferred scheme, the quantity of battery module is a plurality of, and a plurality of battery module is the array setting and is in the casing, be located same row battery module in the pressure release board with same piece pressure release pipeline is linked together.

Preferably, the number of the battery modules is multiple, the multiple battery modules are arranged in the shell in an array mode, and each battery module is internally provided with a pressure release plate communicated with an independent pressure release pipeline.

Preferably, the housing is provided with an electrical connection space.

Compared with the prior art, the utility model has the beneficial effects that:

The utility model provides a battery pack, which comprises a shell, a battery module and a pressure release pipeline, wherein the battery module is arranged in the shell, the battery module comprises a plurality of electric cores, the electric cores are distributed in two rows along the length direction of the battery module, the two rows of electric cores are oppositely arranged, the pressure release board is arranged between the two rows of electric cores, the electric cores are communicated with the pressure release board, the pressure release pipeline is communicated with the pressure release board, and at least one end of the pressure release pipeline extends out of the shell and is communicated with the outside atmosphere. Through the arrangement, the gas generated when the battery cell is out of control is discharged out of the battery pack through the pressure relief plate via the pressure relief pipeline, so that the safety performance of the battery pack is improved; simultaneously, two rows of electric cores are oppositely arranged, and the same pressure release plate is used together, so that the space utilization rate of the battery pack is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model;

FIG. 4 is a second schematic diagram of a battery cell according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a pressure relief plate according to an embodiment of the present utility model;

Fig. 6 is a cross-sectional view of a relief plate provided in an embodiment of the present utility model.

Reference numerals:

100. A battery pack;

10. a housing; 11. an electrical connection space;

20. A battery module; 21. a battery cell; 211. a pole; 212. explosion-proof holes; 22. an end plate; 221. a through hole; 23. an end plate connector;

30. a pressure relief plate; 31. a pressure relief hole; 32. a partition plate; 33. an exhaust pipe;

40. And a pressure release pipeline.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, 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 at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The battery cell generates a large amount of heat due to chemical reaction in the charge and discharge process of the battery pack, and the heat can generate high-temperature and high-pressure gas in the battery cell, so that the thermal runaway of the battery module or the battery pack is caused.

Among the prior art, through setting up the release board with the gas discharge in the electric core, for example, the release board that provides in the earlier stage patent of application number 202211610189.7, every row of electric core of battery module all need set up a release board, and the release board sets up in the top of electric core to cause battery module space utilization lower, and then cause the space utilization of battery package lower.

In order to solve the above-mentioned problems, as shown in fig. 1 and 2, this embodiment provides a battery pack 100, the battery pack 100 includes a housing 10, a battery module 20 and a pressure release plate 30, the battery module 20 is disposed in the housing 10, the battery module 20 includes a plurality of electric cores 21, the plurality of electric cores 21 are arranged in two rows along the length direction of the battery module 20, the two rows of electric cores 21 are oppositely disposed, and a pressure release plate 30 is disposed between the two rows of electric cores 21, the electric cores 21 are communicated with the pressure release plate 30, the pressure release plate 30 is communicated with the pressure release plate 40, and at least one end of the pressure release plate 40 extends out of the housing 10 and is communicated with the outside atmosphere. With the above arrangement, the gas generated when the battery cell 21 is thermally out of control is discharged out of the battery pack 100 through the pressure release plate 30 via the pressure release pipe 40, so as to improve the safety performance of the battery pack 100; meanwhile, the two rows of cells 21 are oppositely arranged, and the same pressure release plate 30 is used together, so that the space utilization rate of the battery pack 100 is improved.

As shown in fig. 1 and 2, the battery module 20 includes two end plates 22 and end plate connecting members 23, the two end plates 22 are respectively disposed at both ends of the battery module 20 in the length direction, the end plate connecting members 23 are disposed at both sides of the battery module 20 in the width direction, and both ends of the end plate connecting members 23 are respectively connected with the two end plates 22 for fixing the plurality of battery cells 21, preventing the battery cells 21 from being displaced.

As shown in fig. 1, the number of the battery modules 20 is plural, the plurality of battery modules 20 are arranged in the housing 10 in an array, and the pressure release plates 30 in the same row of battery modules 20 are communicated with the same pressure release pipe 40, so as to facilitate improving the space utilization in the battery pack 100. In other embodiments, the number of the battery modules 20 is plural, the plurality of battery modules 20 are arranged in an array in the housing 10, and the pressure release plate 30 in each battery module 20 is in communication with an independent pressure release pipe 40.

As shown in fig. 1, the housing 10 is provided with an electrical connection space 11 for placing an electrical connector that enables electrical communication between the electrical device and the battery pack 100.

As shown in fig. 2, one of the end plates 22 is provided with a through hole 221, one end of the pressure relief plate 30 is provided with an exhaust pipe 33, and the exhaust pipe 33 is inserted into the through hole 221 and is communicated with the pressure relief pipe 40.

As shown in fig. 1-5, the pressure release plate 30 is provided with a pressure release hole 31, the battery cell 21 includes a explosion-proof hole 212, the explosion-proof hole 212 is disposed at one end of the battery cell 21 far away from the pole 211 of the battery cell 21, and the explosion-proof hole 212 is communicated with the pressure release hole 31. During operation, gas generated by thermal runaway of the battery cell 21 is decompressed through the explosion-proof hole 212 at the bottom of the battery cell 21, then enters the decompression plate 30 through the decompression hole 31 on the decompression plate 30, and then enters the decompression pipeline 40 to be discharged out of the battery pack 100. When thermal runaway of the battery pack 100 occurs, the gas of thermal runaway is prevented from being released to affect the normal operation of the pole 211, and the damage of the end plate connector 23 by the gas of thermal runaway can be prevented.

Further, an explosion-proof sheet is arranged in the explosion-proof hole 212, a weak part is arranged on the explosion-proof sheet, the explosion pressure threshold value of the weak part is smaller than that of the battery cell 21, when the battery cell 21 is thermally out of control, the weak part is opened first, gas enters the pressure release plate 30 through the pressure release hole 31, explosion of the battery cell 21 is prevented, and the safety performance of the battery pack 100 is improved.

Optionally, the pressure relief hole 31 and the explosion-proof hole 212 are encapsulated by sealant. During normal use of the battery, the internal system of the battery pack 100 is isolated from the external environment, and external air does not enter the inside of the battery cell 21.

Optionally, the number of the pressure relief holes 31 and the number of the explosion-proof holes 212 are arranged in a one-to-one correspondence, and the area of the pressure relief holes 31 is greater than or equal to the area of the explosion-proof holes 212. The gas sprayed out of the battery cell 21 during thermal runaway is prevented from directly striking the pressure release plate 30. Which contributes to the improvement of the safety performance of the battery pack 100.

As shown in fig. 6, the pressure release plate 30 further includes a partition plate 32, the pressure release plate 30 has a hollow structure, and the partition plate 32 is disposed in the pressure release plate 30 and extends in a vertical direction. When one of the cells 21 is thermally out of control by the separator 32, the generated gas is blocked by the separator 32, so that the opposite cell 21 is not affected, the thermal out of control is prevented from spreading, and the safety performance of the battery pack 100 is further improved.

Note that in the description of this specification, a description referring to terms "some embodiments", "other embodiments", and the like, 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description is only of the preferred embodiments of the utility model and the technical principles employed. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. A battery pack, comprising:

A housing (10);

The battery module (20), the battery module (20) is arranged in the shell (10), the battery module (20) comprises a plurality of electric cores (21), the electric cores (21) are arranged in two rows along the length direction of the battery module (20), the electric cores (21) in two rows are oppositely arranged, a pressure release plate (30) is arranged between the electric cores (21) in two rows, and the electric cores (21) are communicated with the pressure release plate (30);

the pressure relief pipeline (40) is communicated with the pressure relief plate (30), and at least one end of the pressure relief pipeline (40) extends out of the shell (10) and is communicated with the outside atmosphere.

2. The battery pack according to claim 1, wherein the pressure release plate (30) is provided with a pressure release hole (31), the battery cell (21) comprises a explosion-proof hole (212), the explosion-proof hole (212) is arranged at one end of the battery cell (21) away from a pole (211) of the battery cell (21), and the explosion-proof hole (212) is communicated with the pressure release hole (31).

3. The battery pack according to claim 2, wherein the pressure relief hole (31) and the explosion-proof hole (212) are sealed by a sealant.

4. The battery pack according to claim 2, wherein the number of the pressure relief holes (31) and the number of the explosion-proof holes (212) are arranged in one-to-one correspondence, and the area of the pressure relief holes (31) is larger than or equal to the area of the explosion-proof holes (212).

5. The battery pack according to claim 1, wherein the pressure release plate (30) further comprises:

The partition plate (32) is of a hollow structure in the pressure release plate (30), and the partition plate (32) is arranged in the pressure release plate (30) and extends along the vertical direction.

6. The battery pack according to claim 1, wherein the battery module (20) includes:

Two end plates (22); and

End plate connecting pieces (23), two end plates (22) are respectively arranged at two ends of the battery module (20) along the length direction, the end plate connecting pieces (23) are arranged at two sides of the battery module (20) along the width direction, and two ends of each end plate connecting piece (23) are respectively connected with two end plates (22).

7. The battery pack according to claim 6, wherein one of the end plates (22) is provided with a through hole (221), one end of the pressure release plate (30) is provided with an exhaust pipe (33), and the exhaust pipe (33) is inserted into the through hole (221) and is communicated with the pressure release pipe (40).

8. The battery pack according to any one of claims 1 to 7, wherein the number of the battery modules (20) is plural, the plural battery modules (20) are arranged in an array in the housing (10), and the pressure release plates (30) in the same row of the battery modules (20) are in communication with the same pressure release pipe (40).

9. The battery pack according to any one of claims 1 to 7, wherein the number of the battery modules (20) is plural, the plural battery modules (20) are arranged in an array in the housing (10), and the pressure release plate (30) in each battery module (20) is in communication with the independent pressure release pipe (40).

10. Battery pack according to any of claims 1-7, characterized in that the housing (10) is provided with an electrical connection space (11).