Pressure relief support assembly and battery module

Abstract

The utility model provides a pressure relief support assembly and a battery module, the pressure relief support assembly comprises: a pressure relief support, one side, facing a first direction, of the pressure relief support is provided with an accommodating groove and a pressure relief port, and the accommodating groove is used for installing a busbar; a material channel is formed in the protective cover, and the protective cover covers the pressure relief opening, so that the material channel is communicated with the pressure relief opening, and the protective cover isolates the pressure relief opening from the accommodating groove, and therefore, when the thermal runaway phenomenon occurs to the single battery, the pressure generated by the thermal runaway phenomenon is released through the pressure relief opening; when the battery module is in thermal runaway, thermal substances sprayed out of the pressure relief opening are discharged into the substance channel, and the thermal substances sprayed out of the pressure relief opening are prevented from being scattered on the busbar due to the isolation effect of the protective cover on the pressure relief opening and the accommodating groove, so that thermal runaway spreading and explosion of the battery module are avoided, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pressure relief bracket assembly and a battery module. Background Art

[0002] With the rapid development of new energy technologies, battery modules have been widely used in various new energy vehicles and energy storage power stations. Battery modules usually include multiple battery cells, which are electrically connected through a bus installed on a CCS bracket. During the use of the battery module, if short circuits, overcharges, etc. occur, a large amount of heat will accumulate inside the battery cells, resulting in thermal runaway. Thermal runaway will cause the internal pressure of the battery cells to be too high, causing fire or even explosion.

[0003] In the prior art, a pressure relief port is generally provided on the CCS bracket to release the pressure generated by the thermal runaway phenomenon. However, this method will cause hot substances ejected from the pressure relief port, such as electrolyte, to scatter on the bus, thereby causing the thermal runaway of the battery module to spread, resulting in an explosion and posing a safety hazard. Utility Model Content

[0004] The present application mainly provides a pressure relief bracket assembly and a battery module, which can prevent hot substances ejected from the pressure relief port from scattering on the bus, thereby avoiding the spread of thermal runaway of the battery module and explosion, and reducing safety hazards.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a pressure relief bracket assembly, the pressure relief bracket assembly includes: a pressure relief bracket, a side of the pressure relief bracket facing the first direction is formed with a receiving groove and a pressure relief port, the receiving groove is used to install the bus; a protective cover, forming a material channel, the protective cover is arranged on the pressure relief port, so that the material channel is connected to the pressure relief port and the protective cover isolates the pressure relief port and the receiving groove.

[0006] In a specific embodiment, the material channel is extended along a second direction, the second direction is arranged to intersect with the first direction, and a material release port communicating with the material channel is formed at an end of the protective cover in the second direction.

[0007] In a specific embodiment, the substance release port is formed on a side of the protective cover facing the first direction.

[0008] In a specific embodiment, the protective cover is further formed with an exhaust port communicated with the material channel, and the exhaust port is formed at an end of the protective cover opposite to the material release port.

[0009] In a specific embodiment, the pressure relief bracket is further formed with a wiring harness channel, and the protective cover is further formed with a wiring harness notch communicating with the wiring harness channel.

[0010] In a specific embodiment, the pressure relief bracket includes a bracket body and a pressure relief body, the bracket body is formed with the accommodating groove, the pressure relief body includes a pressure relief portion and a partition portion, the pressure relief portion is connected to the bracket body and is formed with the pressure relief port, the partition portion is connected to the pressure relief portion and is spaced apart from the bracket body to form the wiring harness channel, and the protective cover is provided on the pressure relief portion and the partition portion so that the wiring harness notch is connected to the wiring harness channel.

[0011] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a battery module, the battery module includes a plurality of battery cells and the pressure relief bracket assembly, the bus is provided in the accommodating groove, and the bus is electrically connected to the plurality of battery cells respectively.

[0012] In a specific embodiment, the battery module further includes a battery management unit, which is electrically connected to the bus bar and is disposed on a side of the protective cover away from the pressure relief bracket.

[0013] In a specific embodiment, the battery module further includes a shell, the shell is formed with a containing space and a vent hole connected to the containing space, the pressure relief bracket assembly is arranged in the containing space, and the vent hole is installed with an explosion-proof valve.

[0014] In a specific embodiment, the shell includes an upper shell and a lower shell, the upper shell forms a first sub-space, the lower shell forms a second sub-space, the first sub-space and the second sub-space together form the accommodating space, the air vent is formed in the upper shell and communicates with the first sub-space, and the pressure relief bracket assembly is arranged in the second sub-space.

[0015] The beneficial effects of the present application are as follows: different from the prior art, the pressure relief bracket assembly provided in the embodiment of the present application includes: a pressure relief bracket, a side of the pressure relief bracket facing the first direction is formed with a receiving groove and a pressure relief port, the receiving groove is used to install a bus; a protective cover, a material channel is formed, the protective cover is arranged on the pressure relief port, so that the material channel is connected with the pressure relief port and the protective cover isolates the pressure relief port and the receiving groove, so that when a thermal runaway phenomenon occurs in a battery cell, the pressure generated by the thermal runaway phenomenon is released through the pressure relief port, and at the same time, the hot material ejected from the pressure relief port is discharged into the material channel, and due to the isolation effect of the protective cover on the pressure relief port and the receiving groove, the hot material ejected from the pressure relief port is prevented from scattering on the bus, thereby avoiding the spread of thermal runaway of the battery module and explosion, thereby reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a battery module implementation scheme provided by the present application;

[0018] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the battery module;

[0019] Figure 3 yes Figure 1 A schematic cross-sectional view of the middle battery module with the FF upward;

[0020] Figure 4 yes Figure 2 A schematic diagram of the three-dimensional structure of the middle pressure relief bracket assembly;

[0021] Figure 5 yes Figure 4 Schematic diagram of the exploded structure of the middle pressure relief bracket assembly;

[0022] Figure 6 yes Figure 3 A schematic cross-sectional view of a middle pressure relief bracket assembly;

[0023] Figure 7 yes Figure 3 Schematic diagram of the cross section of the middle shell. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is particularly noted that the following implementation methods are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following implementation methods are only some implementation methods of the present application rather than all implementation methods. All other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The terms "first", "second" and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, and the manner is such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the implementation mode of this application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. The manner, such as a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0026] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] Please also read Figure 1 and Figure 2 , Figure 1 is a three-dimensional structural schematic diagram of a battery module 10 provided in the present application. Figure 2 yes Figure 1 FIG. 1 is a schematic diagram of the exploded structure of a battery module 10 . The battery module 10 in this embodiment includes a plurality of battery cells 10 a and a pressure relief bracket assembly 10 b.

[0028] Please also read Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 3 yes Figure 1 A schematic cross-sectional view of the battery module 10 with FF upward, Figure 4 yes Figure 2 A schematic diagram of the three-dimensional structure of the middle pressure relief bracket assembly 10b, Figure 5 yes Figure 4 The exploded structural diagram of the middle pressure relief bracket assembly 10b is shown in FIG. Figure 6 yes Figure 3The cross-sectional schematic diagram of the pressure relief bracket assembly 10 b is shown in FIG. 1 . The pressure relief bracket assembly 10 b includes a pressure relief bracket 11 and a protective cover 12 .

[0029] Among them, a accommodating groove 102 and a pressure relief port 103 are formed on one side of the pressure relief bracket 11 facing the first direction A. The accommodating groove 102 is used to install a bus 13, and the bus 13 is electrically connected to multiple battery cells 10a respectively. It can be understood that the number of accommodating grooves 102 and buses 13 can be set according to actual needs, and there is no limitation on this.

[0030] Furthermore, the protective cover 12 is formed with a material channel 104, and the protective cover 12 is arranged on the pressure relief port 103, so that the material channel 104 is connected to the pressure relief port 103 and the protective cover 12 isolates the pressure relief port 103 and the receiving groove 102, so that when the battery cell 10a has a thermal runaway phenomenon, the pressure generated by the thermal runaway phenomenon is released through the pressure relief port 103. At the same time, the hot material ejected from the pressure relief port 103 is discharged into the material channel 104, and due to the isolation effect of the protective cover 12 on the pressure relief port 103 and the receiving groove 102, the hot material ejected from the pressure relief port 103 is prevented from scattering on the bus 13, thereby avoiding the thermal runaway of the battery module 10 from spreading and causing an explosion, thereby reducing safety hazards.

[0031] Among them, the material channel 104 is extended along the second direction B, and the second direction B is cross-arranged with the first direction A. In the present embodiment, the second direction B and the first direction A are perpendicular to each other. The end of the protective cover 12 in the second direction B is also formed with a material release port 105 connected to the material channel 104, so that the hot material discharged from the pressure relief port 103 into the material channel 104 is discharged through the material release port 105, avoiding the accumulation of hot material in the material channel 104.

[0032] Optionally, the substance release port 105 is formed on a side of the protective cover 12 facing the first direction A.

[0033] Furthermore, the protective cover 12 is also formed with an exhaust port 106 connected to the material channel 104. The exhaust port 106 is formed at one end of the protective cover 12 opposite to the material release port 105, so that when the battery cell 10a has a thermal runaway phenomenon, the high-temperature gas generated by the thermal runaway phenomenon is discharged from the pressure relief port 103 into the material channel 104, and then discharged through the exhaust port 106. That is, the protective cover 12 in this embodiment can not only discharge hot substances through the material release port 105 set at one end, but also discharge high-temperature gases through the exhaust port 106 set at the other end. In actual applications, the battery module 10 is as follows: Figure 3The placement state shown, in this placement state, the material release port 105 is located at the bottom of the protective cover 12, and the exhaust port 106 is located at the top of the protective cover 12. When the battery cell 10a has a thermal runaway phenomenon, the hot material sprayed from the pressure relief port 103 to the material channel 104, such as the electrolyte, will flow along the material channel 104 to the material release port 105 at the bottom due to the action of gravity, and the high-temperature gas sprayed from the pressure relief port 103 to the material channel 104 will flow along the material channel 104 to the exhaust port 106 at the top.

[0034] Furthermore, the pressure relief bracket 11 in this embodiment is also formed with a wiring harness channel 107, and the protective cover 12 is also formed with a wiring harness gap 108 connected to the wiring harness channel 107, so that the collection wiring harness connected to the bus 13 is led out through the wiring harness gap 108 and the wiring harness channel 107 in sequence.

[0035] Specifically, the pressure relief bracket 11 includes a bracket body 111 and a pressure relief body 112, the bracket body 111 is formed with a accommodating groove 102, the pressure relief body 112 includes a pressure relief portion 1121 and a partition 1122, the pressure relief portion 1121 is connected to the bracket body 11 and is formed with a pressure relief port 103, the partition 1122 is connected to the pressure relief portion 1121 and is spaced apart from the bracket body 111 to form a wiring harness channel 107, the protective cover 12 is covered on the pressure relief portion 1121 and the partition 1122, so that the wiring harness gap 108 is connected with the wiring harness channel 107. Through this arrangement, on the one hand, the collection wiring harness is led out through the wiring harness gap 108 and the wiring harness channel 107 in sequence, and on the other hand, the collection wiring harness is spaced apart from the material channel 104 by the partition 1122 to avoid damage to the collection wiring harness by hot materials.

[0036] Further reading Figure 2 and Figure 3 The battery module 10 in this embodiment further includes a battery management unit 10c, and the battery management unit 10c is electrically connected to the bus 13. In this embodiment, the battery management unit 10c is electrically connected to the bus 13 through the above-mentioned acquisition harness.

[0037] Among them, the battery management unit 10c is arranged on the side of the protective cover 12 away from the pressure relief bracket 11. Through this arrangement, the protective cover 12 isolates the battery management unit 10c from the pressure relief port 103, preventing hot substances ejected from the pressure relief port 103 from scattering on the battery management unit 10c, thereby avoiding the spread of thermal runaway of the battery module 10 and causing explosion, thereby reducing safety hazards.

[0038] Optionally, the battery management unit 10c is arranged on the side of the protective cover 12 facing the first direction A, and as described above, the material release port 105 is arranged at the end of the protective cover 12 in the second direction B, so that when the hot material is sprayed out from the pressure relief port 103, it is blocked by the protective cover 12 and will not be directly sprayed onto the battery management unit 10c through the material release port 105.

[0039] Further reading Figure 2 , Figure 3 and Figure 7 , Figure 7 yes Figure 3 The schematic cross-sectional view of the middle shell 10d shows that the battery module 10 in this embodiment also includes a shell 10d, and the shell 10d is formed with a accommodating space 109 and a vent 110 connected to the accommodating space 109. The pressure relief bracket assembly 10b is arranged in the accommodating space 109, and the vent 110 is installed with an explosion-proof valve 115, so that when the battery cell 10a has a thermal runaway phenomenon, the high-temperature gas generated by the thermal runaway phenomenon is discharged into the accommodating space 109 through the exhaust port 106, and then discharged when the explosion-proof valve 115 is opened.

[0040] Among them, the shell 10d includes an upper shell 113 and a lower shell 114, the upper shell 113 forms a first sub-space 1091, and the lower shell 114 forms a second sub-space 1092. The first sub-space 1091 and the second sub-space 1092 together form an accommodating space 109, the air vent 110 is formed in the upper shell 113 and communicates with the first sub-space 1091, and the pressure relief bracket assembly 10b is arranged in the second sub-space 1092.

[0041] Different from the prior art, the pressure relief bracket assembly provided in the embodiment of the present application includes: a pressure relief bracket, a side of the pressure relief bracket facing the first direction is formed with a receiving groove and a pressure relief port, the receiving groove is used to install a bus; a protective cover, forming a material channel, the protective cover is arranged on the pressure relief port, so that the material channel is connected with the pressure relief port and the protective cover isolates the pressure relief port and the receiving groove, so that when thermal runaway occurs in the battery cell, the pressure generated by the thermal runaway phenomenon is released through the pressure relief port, and at the same time, the hot material ejected from the pressure relief port is discharged into the material channel, and due to the isolation effect of the protective cover on the pressure relief port and the receiving groove, the hot material ejected from the pressure relief port is prevented from scattering on the bus, thereby avoiding the spread of thermal runaway of the battery module and explosion, thereby reducing safety hazards.

[0042] The above description is only part of the implementation methods of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A pressure relief bracket assembly, characterized in that: The pressure relief bracket assembly comprises: A pressure relief bracket, wherein a receiving groove and a pressure relief port are formed on one side of the pressure relief bracket facing the first direction, and the receiving groove is used for installing a busbar; A protective cover is formed with a material channel, and the protective cover is arranged on the pressure relief port so that the material channel is communicated with the pressure relief port and the protective cover isolates the pressure relief port and the accommodating groove.

2. The pressure relief bracket assembly according to claim 1, characterized in that: The material channel is extended along a second direction, the second direction is arranged to intersect with the first direction, and a material release port communicating with the material channel is formed at an end of the protective cover in the second direction.

3. The pressure relief bracket assembly according to claim 2, characterized in that: The substance release port is formed on one side of the protective cover facing the first direction.

4. The pressure relief bracket assembly according to claim 2, characterized in that: The protective cover is also formed with an exhaust port communicated with the material channel, and the exhaust port is formed at an end of the protective cover opposite to the material release port.

5. The pressure relief bracket assembly according to claim 1, characterized in that: The pressure relief bracket is also formed with a wiring harness channel, and the protective cover is also formed with a wiring harness notch connected to the wiring harness channel.

6. The pressure relief bracket assembly according to claim 5, characterized in that: The pressure relief bracket includes a bracket body and a pressure relief body, the bracket body is formed with the accommodating groove, the pressure relief body includes a pressure relief portion and a partition portion, the pressure relief portion is connected to the bracket body and is formed with the pressure relief port, the partition portion is connected to the pressure relief portion and is spaced apart from the bracket body to form the wiring harness channel, and the protective cover is provided on the pressure relief portion and the partition portion so that the wiring harness notch is connected to the wiring harness channel.

7. A battery module, characterized in that: The battery module includes a plurality of battery cells and the pressure relief bracket assembly according to any one of claims 1 to 6. The busbar is disposed in the receiving groove and is electrically connected to the plurality of battery cells respectively.

8. The battery module according to claim 7, characterized in that: The battery module also includes a battery management unit, which is electrically connected to the bus bar and is arranged on a side of the protective cover away from the pressure relief bracket.

9. The battery module according to claim 7, characterized in that: The battery module further comprises a shell, the shell is formed with a containing space and a vent hole communicating with the containing space, the pressure relief bracket assembly is arranged in the containing space, and the vent hole is installed with an explosion-proof valve.

10. The battery module according to claim 9, characterized in that: The shell includes an upper shell and a lower shell, the upper shell forms a first sub-space, the lower shell forms a second sub-space, the first sub-space and the second sub-space together form the accommodating space, the air vent is formed in the upper shell and communicates with the first sub-space, and the pressure relief bracket assembly is arranged in the second sub-space.

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