WO2025200317A1 - 电池包 - Google Patents

电池包

Info

Publication number
WO2025200317A1
WO2025200317A1 PCT/CN2024/118222 CN2024118222W WO2025200317A1 WO 2025200317 A1 WO2025200317 A1 WO 2025200317A1 CN 2024118222 W CN2024118222 W CN 2024118222W WO 2025200317 A1 WO2025200317 A1 WO 2025200317A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
module
isolation plate
battery
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/118222
Other languages
English (en)
French (fr)
Inventor
梁先豫
韦雪青
刘平平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Energy Co Ltd
Original Assignee
Eve Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Priority to DE212024000110.4U priority Critical patent/DE212024000110U1/de
Priority to EP24218539.5A priority patent/EP4625648A1/en
Priority to KR1020240189676A priority patent/KR20250144874A/ko
Priority to JP2024221764A priority patent/JP2025155780A/ja
Priority to US19/014,296 priority patent/US20250309453A1/en
Publication of WO2025200317A1 publication Critical patent/WO2025200317A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of battery packs, and in particular to a battery pack.
  • the Battery Management System plays a vital role in the health and safety of batteries. Failures in the BMS or problems with the batteries themselves can lead to a phenomenon known as thermal runaway, damaging the BMS.
  • battery pack designs are often simple and highly integrated, and there are deficiencies in the protection design during thermal runaway.
  • the embodiments of the present application provide a battery pack that can improve the technical problem of damaging the BMS module during thermal runaway of the existing battery pack.
  • a housing wherein a receiving space is provided in the housing
  • the battery module being disposed in the accommodation space;
  • a BMS module is spaced apart from the battery module
  • FIG1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application.
  • a first feature being “above” or “below” a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being “above,” “above,” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being “below,” “below,” and “below” a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.
  • the isolation plate 40 Since the isolation plate 40 is sealed, when the battery module 20 experiences thermal runaway, the high-temperature gas and high-temperature ejecta generated by the thermal runaway are prevented from being transferred to the BMS module 30 along the joint between the isolation plate 40 and the housing 10, so that the isolation plate 40 can block the impact from the thermal runaway, ensure that the BMS module 30 is not damaged, and avoid damage to the BMS system, so that the BMS module 30 can report a thermal runaway warning signal.
  • the isolation plate 40 is firmly connected to the housing 10, which can separate the battery module 20 from the BMS module 30, isolate the heat and heat radiation generated by the operation of the BMS module 30, and prevent the lower battery from being heated, thereby achieving the effect of insulation and heat insulation.
  • the BMS module 30 is set on the isolation plate 40, which can fix the BMS module 30 and prevent the BMS module 30 from detaching, thereby improving battery safety.
  • the shell 10 includes a bottom wall 11 and a shell wall 12.
  • the shell wall 12 is arranged around the bottom wall 11 to form a accommodating space 101.
  • the end of the shell wall 12 away from the bottom wall 11 is provided with a shell opening 13 facing the BMS module 30.
  • the isolation plate 40 is provided at the shell opening 13, and the periphery of the isolation plate 40 is sealed to the shell wall 12. Providing the isolation plate 40 at the shell opening 13 away from the bottom wall 11 can increase the space for the battery module 20 and avoid the BMS module 30 and the battery module 20 being too close.
  • the BMS module 30 is arranged at the top of the shell 10 and is independently arranged from the battery module 20.
  • the shell wall 12 includes an end face facing the BMS module 30 and an inner side face facing the accommodating space 101.
  • the end face is arranged around the shell opening 13.
  • the bottom periphery of the isolation plate 40 is sealed to the end surface, that is, the isolation plate 40 is entirely located outside the shell 10; in some embodiments, the side of the isolation plate 40 is sealed to the end of the inner side surface away from the bottom wall 11, that is, the isolation plate 40 is at least partially located in the accommodating space 101, and the top surface of the isolation plate 40 can be higher than the end surface or flush with the end surface, but not lower than the end surface.
  • an explosion-proof valve is provided on the housing wall 12. If thermal runaway occurs in the battery module 20, electrolyte will be ejected outward from the explosion-proof valve. Since the BMS module 30 is located on top of the battery module 20 and is not in the direction of the electrolyte ejection, the BMS module 30 is prevented from being the first to be impacted. Assuming the BMS module 30 is intact, a thermal runaway alarm can be issued, allowing for timely detection of thermal runaway events in the battery module 20.
  • the battery pack 100 further includes a sealant layer (not shown), which is sealed at the junction between the separator 40 and the shell wall 12.
  • the sealant layer can be applied to the periphery of the separator 40 or to the inner periphery of the shell wall 12.
  • the sealant can be a liquid sealant, hot melt sealant, or paste sealant. Sealant has high stability and good adhesion, preventing the separator 40 from moving or falling off.
  • the battery pack 100 also includes a sealing tape, which can be arranged on the periphery of the isolation plate 40, and then the isolation plate 40 is adhered to the shell wall 12; the sealing tape can also be adhered to the inner periphery of the shell wall 12, and then the isolation plate 40 is aligned with the sealing tape and adhered to fix the isolation plate 40.
  • a sealing tape which can be arranged on the periphery of the isolation plate 40, and then the isolation plate 40 is adhered to the shell wall 12; the sealing tape can also be adhered to the inner periphery of the shell wall 12, and then the isolation plate 40 is aligned with the sealing tape and adhered to fix the isolation plate 40.
  • the isolation plate 40 is not limited to the housing opening 13.
  • the isolation plate 40 can be disposed within the accommodation space 101, dividing the accommodation space 101 into a first chamber and a second chamber.
  • the BMS module 30 is disposed in the first chamber, and the battery module 20 is disposed in the second chamber.
  • the periphery of the isolation plate 40 is sealed to the housing 10. Because the volume of the battery module 20 is smaller than that of the BMS module 30, the size of the first chamber can be smaller than that of the second chamber.
  • the housing 10 has a square structure and includes a bottom wall 11 and a housing wall 12 surrounding the bottom wall 11.
  • the housing wall 12 includes two opposing side walls and two end walls, with the side walls being longer than the end walls.
  • the housing 10 also includes a top wall (not shown) that covers the housing wall 12 to seal the accommodating space 101.
  • the isolation plate 40 includes two opposite long sides and two opposite short sides.
  • the isolation plate 40 is arranged parallel to the end wall, that is, the two short sides of the isolation plate 40 are respectively sealed and connected to the two side walls, one of the long sides is connected to the bottom wall 11, and one of the long sides is connected to the top wall, so that the periphery of the isolation plate 40 and the shell 10 are sealed and connected, and the first chamber and the second chamber are separated in the horizontal direction to separate the battery module 20 from the BMS module 30; in some embodiments, the isolation plate 40 is arranged parallel to the bottom wall 11, the two long sides are respectively sealed and connected to the two side walls, and the two short sides are respectively sealed and connected to the two end walls, so as to separate the first chamber and the second chamber in the vertical direction to separate the battery module 20 from the BMS module 30.
  • the isolation plate 40 is provided with a first opening 41
  • the battery pack 100 further includes a connecting wire 70, which is passed through the first opening 41.
  • One end of the connecting wire 70 is connected to the battery module 20, and the other end of the connecting wire 70 is connected to the BMS module 30.
  • a bracket is provided in the accommodating space 101, and the battery module 20 includes a bus 22.
  • the bus 22 is mounted on the bracket, and the connecting wire 70 is electrically connected to the bus 22.
  • One end of the connecting wire 70 is connected to the bus 22, and the other end is connected to the BMS module 30.
  • the connecting wire 70 includes a plurality of branch harnesses, and the end of the branch harnesses close to the BMS is fastened together by a connecting terminal 71.
  • the BMS module 30 is provided with a connector 72, and the connecting terminal 71 is correspondingly connected to the connector 72 to transmit the collected signal to the BMS module 30 to control and manage the operation of the battery pack 100.
  • the first opening 41 provided on the isolation plate 40 can facilitate the connection of the connecting wire 70 to the BMS module 20 , thereby reducing the length of the wire required for wiring and facilitating the wiring of the battery module 20 .
  • the battery module 20 also includes a heat conducting plate, on which a temperature collection portion is provided.
  • the heat conducting plate is electrically connected to the battery pack 100 through the bus 22.
  • the connecting line 70 is passed through the first opening 41 and connected to the BMS module 30.
  • the temperature information of the battery pack 100 can be transmitted to the BMS module 30 through the connecting line 70, so that the BMS module 30 can detect the temperature information of the battery pack 100 to avoid overheating of the battery pack 100.
  • the isolation plate 40 includes a first inner wall 411 surrounding the first opening 41, and the connecting wire 70 is sealed and connected to the first inner wall 411.
  • the sealed connection can prevent the high-temperature gas and high-temperature ejecta generated by thermal runaway from being transmitted to the BMS module 30 along the gap of the first opening 41, thereby increasing the safety of the BMS module 30.
  • the connection method between the connecting wire 70 and the first inner wall 411 can be a sealed connection between one end of the branch wiring harness close to the connecting terminal 71 and the first inner wall 411, or it can be a sealed connection between the connecting terminal 71 and the first inner wall 411.
  • the size and shape of the first opening 41 can be set according to actual conditions to ensure that the connecting wire 70 can be passed through the first opening 41. It can be understood that when the number of connecting wires 70 increases, a plurality of first openings 41 can be set accordingly.
  • connection line 70 and the first inner wall 411 can be connected by a sealant, a sealing ring, a sealing tape, or the like, such as by gluing the sealant between the connection line 70 and the first inner wall 411. It is understood that those skilled in the art can adopt other methods to seal the connection line 70 to the first inner wall 411, and this application does not limit this.
  • the isolation plate 40 includes a protrusion that protrudes toward the accommodation space 101 and forms a groove.
  • the first inner wall 411 serves as the groove wall, and a sealing structure is disposed within the groove.
  • a first notch 412, opposite the first opening 41, is disposed at the end of the protrusion away from the BMS module 30.
  • the first notch 412 is smaller than the first opening 41 and serves to guide the connection cable 70 toward the BMS module 30. After passing through the first notch 412, the connection cable 70 extends to the first opening 41 and connects to the connector 72.
  • the connection cable 70 can be sealed with the first notch 412 to enhance structural stability.
  • Figure 4 is an exploded schematic diagram 3 of a battery pack provided in an embodiment of the present application.
  • Figure 5 is a top view 1 of the battery pack provided in an embodiment of the present application with the BMS module retained.
  • Figure 6 is a cross-sectional view of the battery pack along line A-A of Figure 5.
  • the BMS module 30 further includes a tab 31 and a control board 32.
  • the control board 32 is mounted on the side facing the battery module 20.
  • the control board 32 is used to collect information from the battery module 20 and upload the information to a host computer, where the host computer is a computer and corresponding control software for the integrated management control board.
  • the tab 31 is connected to the side of the control board 32 facing the battery module 20 and is provided with a through hole.
  • the battery module 20 includes a battery pack 21 and a bus 22 connected to the battery pack 21.
  • the bus 22 is provided with vias corresponding to the through holes.
  • the bus 22 is used to collect, distribute, and output current to ensure safe and efficient operation of the battery system.
  • the battery pack 100 also includes a fastener 60.
  • the separator 40 is provided with a second opening 42.
  • the fastener 60 is inserted through the second opening 42, the through hole, and the via to secure the tab 31 and the bus 22.
  • the connection between the tab 31 and the bus 22 allows the BMS module 30 to measure the voltage of the battery module 20 to monitor the battery status.
  • the second opening 42 in the separator 40 facilitates the connection between the tab 31 and the bus 22, ensuring the stability and reliability of the battery pack 100 without changing the internal structure of the original battery pack 100.
  • the busbar connected to the first battery cell is connected to the first extension 2221, and the busbar connected to the last battery cell is connected to the second extension 2222.
  • the first extension 2221 and the second extension 2222 have opposite polarities.
  • the tab 31 is connected to the side of the control board 32 facing the battery pack 21.
  • the tab 31 includes a first tab 311 and a second tab 312.
  • the first tab 311 and the first extension 2221 have the same polarity, while the second tab 312 and the second extension 2222 have the same polarity.
  • the first tab 311 is the negative pole and is connected to the first extension 2221, which is also the negative pole.
  • the second tab 312 is the positive pole and is connected to the second extension 2222, which is also the positive pole.
  • the battery pack 100 also includes a plurality of fasteners 60, which can be screws, bolts, studs, etc.
  • the busbar 22 and tab 31 connected using fasteners 60 are easy to install and disassemble, and the connection is more reliable and stable.
  • the second tab 312 defines a second through hole 314, the second extension section 2222 defines a second via hole, the second tab 312 is attached to the second extension section 2222, and a fastener 60 is inserted through the second through hole 314 and the second via hole to secure the second tab 312 and the second extension section 2222.
  • the isolation plate 40 includes a second inner wall 421 surrounding the second opening 42, with a fastener 60 sealingly connected to the second inner wall 421.
  • This sealed connection prevents high-temperature gases and high-temperature ejecta generated by thermal runaway from being transmitted through the gap in the second opening 42 to the BMS module 30, thereby enhancing the safety of the BMS module 30.
  • one fastener 60 secures the first extension 2221 and the first tab 311, then seals the fastener 60 to the second inner wall 421 via a sealing structure.
  • Another fastener 60 secures the second extension 2222 and the second tab 312, then seals the fastener 60 to the second inner wall 421 via a sealing structure.
  • the shell wall 12 includes an end face facing the BMS module 30, the second connecting edge 14 is connected to the periphery of the end face, when the isolation plate 40 is arranged at the shell opening 13, the isolation plate 40 and the first connecting edge 331 are located in the same plane, and when the isolation plate 40 is arranged in the accommodating space 101, the isolation plate 40 is arranged below the first connecting edge 331.
  • the first connecting edge 331 and the second connecting edge 14 are adapted to each other.
  • the first connecting edge 331 and the second connecting edge 14 can be fastened around the housing 10 by screws, bolts, or other fastening structures.
  • plug-in, snap-on, or other methods to connect the cover 33 and the housing 10, which is not limited in this application.
  • the shell 10 also includes a gasket 141, a groove is provided in the second connecting edge 14, and the gasket 141 is disposed in the groove.
  • the cover body 33 includes a protrusion, which is connected to the first connecting edge 331 and protrudes toward the shell 10. When the cover body 33 is covered on the shell 10, the protrusion is embedded in the gasket 141 to increase the sealing effect of the cover body 33 and the shell 10.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池包(100)，包括：壳体(10)，所述壳体(10)内设有容纳空间(101)；电池模组(20)，所述电池模组(20)设置于所述容纳空间(101)内；BMS模组(30)，与所述电池模组(20)间隔设置；隔离板(40)，设置于电池模组(20)和BMS模组(30)之间，并与所述壳体(10)密封连接，以隔离电池模组(20)和BMS模组(30)。

Description

电池包
本申请要求在2024年3月27日提交中国专利局、申请号为202420619072.3的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池包技术领域，具体涉及一种电池包。
 背景技术
BMS（Battery Management System，电池管理系统）对电池的健康和安全性起着至关重要的作用。当电池管理系统出现故障或者电池自身出现问题时，可能会导致所谓的热失控现象，导致BMS损坏。
 发明概述
相关技术中，基于对电池包成本的考虑、空间的限制，因此电池包设计往往是简易的、高度集成的，热失控时的防护设计存在不足。
本申请的实施例提供了一种电池包，可以改善现有电池包热失控时损坏BMS模组的技术问题。
本申请提供的电池包，包括：
壳体，所述壳体内设有容纳空间；
电池模组，所述电池模组设置于所述容纳空间内；
BMS模组，与所述电池模组间隔设置；
隔离板，设置于电池模组和BMS模组之间，并与所述壳体密封连接，以隔离电池模组和BMS模组。
有益效果
本申请提供的电池包中，电池包包括壳体、电池模组和BMS模组，通过隔离板设置于电池模组和BMS模组之间，并与壳体密封连接，以实现BMS模组和电池模组二者之间的隔绝，从而避免电池模组热失控产生的气体、喷射物等损坏BMS模组。
 附图说明
图1是本申请的实施例提供的电池包的结构示意图；
图2是本申请的实施例提供的电池包的爆炸示意图1；
图3是本申请的实施例提供的电池包的爆炸示意图2；
图4是本申请的实施例提供的电池包的爆炸示意图3；
图5是本申请的实施例提供的电池包的俯视图1；
图6是图5实施例提供的电池包沿A-A的剖视图；
图7是本申请的实施例提供的电池包的俯视图2。
附图标记说明：
100、电池包；
10、壳体；101、容纳空间；11、底壁、12、壳壁；13、壳体开口；14、第二连接边；141、垫圈；
20、电池模组；21、电池组；22、汇流排；221、主体；222、延伸段；2221、第一延伸段；2222、第二延伸段；
30、BMS模组；31、巴片；311、第一巴片；312、第二巴片；313、第一通孔；314、第二通孔；32、控制板；33、盖体；331、第一连接边；
40、隔离板；41、第一开口；411、第一内壁；412、第一槽口；42、第二开口；421、第二内壁；
50、密封圈；
60、紧固件；
70、连接线；71、连接端子；72、连接器。
 本发明的实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，第一特征水平高度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“左”、“右”、“前”、“后”等方位或位置关系为基于附图所示的方位或位置关系，是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”用于在描述上加以区分，并没有特殊的含义。
BMS（Battery Management System，电池管理系统）对电池的健康和安全性起着至关重要的作用。当电池管理系统出现故障或者电池自身出现问题时，可能会导致所谓的热失控现象，导致BMS损坏。相关技术中，基于对电池包成本的考虑、空间的限制，因此电池包设计往往是简易的、高度集成的，在热失控防护设计存在不足。
请参阅图1-图3，图1是本申请的实施例提供的电池包的结构示意图。图2是本申请的实施例提供的电池包的爆炸示意图1。图3是本申请的实施例提供的电池包的爆炸示意图2。电池包100包括壳体10、电池模组20、BMS模组30和隔离板40，壳体10内设有容纳空间101，电池模组20设置于容纳空间101内，电池模组20由多个电池单体组装而成。BMS模组30与电池模组20间隔设置，BMS用于智能化管理及维护电池，监控电池的状态，防止电池出现过充电和过放电，以延长电池的使用寿命。隔离板40设置于电池模组20和BMS模组30之间，并与壳体10密封连接，以隔离电池模组20和BMS模组30，隔离板40可以为耐热性绝缘塑料。一方面，本申请的隔离板40可以阻隔热失控产生的高温气体、高温喷射物向BMS模组30喷射，实现烟气与BMS模组30隔离。由于隔离板40密封连接，在电池模组20发生热失控时，避免热失控产生的高温气体、高温喷射物沿着隔离板40与壳体10的接缝处传递到BMS模组30，使隔离板40可以阻挡来自热失控的冲击，保证BMS模组30不受损伤，避免BMS系统的损坏，以使BMS模组30能报出热失控预警信号。另一方面，隔离板40牢固地连接于壳体10，可以将电池模组20与BMS模组30隔开，隔离BMS模组30工作产生的热量、热辐射，避免下方电池受热，以达到绝缘隔热的作用。此外，且BMS模组30设置在隔离板40上，可以为BMS模组30起到固定作用，防止BMS模组30脱离，以提高电池安全。
在一些实施例中，壳体10包括底壁11和壳壁12，壳壁12围设于底壁11以形成容纳空间101，壳壁12远离底壁11的一端设有朝向BMS模组30的壳体开口13，隔离板40设于壳体开口13，且隔离板40的周缘与壳壁12密封连接。将隔离板40设于远离底壁11一侧的壳体开口13，可以增加电池模组20的空间，避免BMS模组30和电池模组20距离过近。具体地，BMS模组30设置在壳体10顶部，且与电池模组20独立设置。壳壁12包括朝向BMS模组30的端面和朝向容纳空间101的内侧面，端面围设形成壳体开口13。在一些实施例中，隔离板40的底面周缘密封连接于端面，即隔离板40全部位于壳体10外部；在一些实施例中，隔离板40的侧面密封连接于内侧面远离底壁11的一端，即隔离板40至少部分位于容纳空间101内，隔离板40的顶面可以高于端面或与端面平齐，但不低于端面。
在一些实施例中，在壳壁12上设有防爆阀，在电池模组20发生热失控时，电解液自防爆阀向外喷射，由于BMS模组30设置在电池模组20顶部，不在电解液的喷射方向上，可以避免故BMS模组30首先受到冲击。在BMS模组30未损坏的前提下可以进行热失控的报警，以便及时发现电池模组20的热失控事故。
在一些实施例中，电池包100还包括密封胶层（图中未示出），密封胶层密封连接于隔离板40和壳壁12的连接处。具体地，密封胶层可以涂设于隔离板40周缘，亦可以涂设于壳壁12内侧周缘，密封胶可以为液体密封胶、热熔密封胶、膏状密封胶等，密封胶稳定性强，粘合效果好，可以避免隔离板40移动或脱落。
在一些实施例中，电池包100还包括密封圈50，密封圈50可以采用橡胶、硅胶等柔性材料，密封圈50套设于隔离板40，并抵接于壳壁12和隔离板40之间。具体地，密封圈50套设于隔离板40的边缘，密封圈50远离隔离板40的一侧贴设于壳壁12。如密封圈50内可以设置环槽，隔离板40周缘安装于环槽内，并与密封圈50紧密贴合。
在一些实施例中，电池包100还包括密封带，密封带可以设于隔离板40的周缘，再将隔离板40粘设于壳壁12；密封带亦可以粘设于壳壁12内侧周缘，再将隔离板40对准密封带粘设，以固定隔离板40。
可以理解的，本领域技术人员可以采取其他方式使隔离板40密封连接于壳壁12，本申请在此不做限定。
在一些实施例中，隔离板40不限制于壳体开口13处，隔离板40可以设置于容纳空间101内，且将容纳空间101分隔为第一腔室和第二腔室，BMS模组30设于第一腔室，电池模组20设置第二腔室，隔离板40周缘和壳体10密封连接。由于电池模组20的体积小于BMS模组30的体积，故第一腔室的大小可以小于第二腔室的大小。
具体地，壳体10为方形结构，壳体10包括底壁11和围设于底壁11的壳壁12，壳壁12包括相对设置的两个侧壁和两个端壁，侧壁的长度大于端壁的长度。壳体10还包括顶壁（图中未示出），顶壁盖设于壳壁12以密封容纳空间101。隔离板40包括相对的两条长边和相对的两条短边，在一些实施例中，隔离板40与端壁平行设置，即隔离板40的两条短边分别密封连接于两个侧壁，其中一个长边连接于底壁11，其中一个长边连接于顶壁，使得隔离板40周缘和壳体10密封连接，沿水平方向分出第一腔室和第二腔室，以将电池模组20与BMS模组30隔开；在一些实施例中，隔离板40与底壁11平行设置，两条长边分别密封连接于两个侧壁，两条短边分别密封连接于两个端壁，沿竖直方向分出第一腔室和第二腔室，以将电池模组20与BMS模组30隔开。
在一些实施例中，隔离板40开设有第一开口41，电池包100还包括连接线70，连接线70穿设于第一开口41，连接线70的一端连接于电池模组20，连接线70的另一端连接于BMS模组30。具体地，容纳空间101内设有支架，电池模组20包括汇流排22，汇流排22通过安装于支架，连接线70与汇流排22电性连接。连接线70一端连接汇流排22，且另一端连接BMS模组30。连接线70包括多个分支线束，分支线束靠近BMS的一端通过连接端子71束紧在一起，BMS模组30设有连接器72，连接端子71对应连接于连接器72，以将采集到的信号传递至BMS模组30以对电池包100的工作进行控制及管理。隔离板40设置第一开口41可以方便连接线70连接BMS模组20，减少了接线所需的线长，有利于电池模组20的布线。
在一些实施例中，电池模组20还包括导热片，导热片上设有温度采集部，导热片通过汇流排22和电池包100电连接，连接线70穿设于第一开口41并连接于BMS模组30，通过连接线70可以将电池包100的温度信息传输至BMS模组30，以使BMS模组30检测电池包100的温度信息，避免电池包100出现过热情况。
在一些实施例中，隔离板40包括围绕第一开口41的第一内壁411，连接线70和第一内壁411密封连接。密封连接可以防止热失控产生的高温气体、高温喷射物沿着第一开口41的空隙传递到BMS模组30，增加BMS模组30的安全性。具体地，连接线70和第一内壁411的连接方式可以是分支线束靠近连接端子71的一端和第一内壁411之间密封连接，亦可以是连接端子71和第一内壁411之间密封连接。第一开口41的大小、形状可以根据实际情况设置，以保证连接线70可以穿设于第一开口41。可以理解的，当连接线70的数量增加时，第一开口41可以对应设置多个。
在一些实施例中，连接线70和第一内壁411之间可以通过密封胶、密封圈、密封带等结构连接，如采用密封胶粘设于连接线70和第一内壁411之间。可以理解的，本领域技术人员可以采取其他方式使连接线70密封连接于第一内壁411，本申请在此不做限定。
在一些实施例中，隔离板40包括凸出部，凸出部向容纳空间101凸出且形成凹槽，第一内壁411为凹槽的槽壁，密封结构填设于凹槽内。凸出部远离BMS模组30的一端设有和第一开口41相对的第一槽口412，第一槽口412小于第一开口41，以引导连接线70向BMS模组方向30穿设，连接线70穿设于第一槽口412后延伸至第一开口41，并连接于连接器72，连接线70可以和第一槽口412密封连接，以增加结构稳定性。
请结合图3参阅图4-图6，图4是本申请的实施例提供的电池包的爆炸示意图3。图5是本申请的实施例提供的电池包的保留BMS模组状态下的俯视图1。图6是图5提供的电池包沿A-A的剖视图,在一些实施例中，BMS模组30还包括巴片31和控制板32，控制板32安装于朝向电池模组20的一侧，控制板32用于采集电池模组20的信息，并将信息上传至上位机，其中上位机为综合管理控制板的计算机和对应的控制软件。巴片31连接于控制板32朝向电池模组20的一侧，且巴片31开设有通孔。电池模组20包括电池组21和连接于电池组21的汇流排22，汇流排22开设有和通孔对应的过孔。汇流排22用于实现电流的收集、分配与导出，确保电池系统安全、高效运行。电池包100还包括紧固件60，隔离板40设有第二开口42，紧固件60穿设于第二开口42、通孔和过孔，以固定巴片31和汇流排22。通过巴片31和汇流排22的连接，使得BMS模组30可以测得电池模组20的电压，以监控电池状态。在隔离板40设置第二开口42，可以方便巴片31和汇流排22的连接，在不改变原电池包100内部结构的情况下，保证电池包100工作的稳定性和可靠性。
具体地，请参阅图7，图7是本申请的实施例提供的电池包的去除BMS模组状态下的俯视图2。电池组21包括多个电池单体，汇流排22包括主体221和延伸段222，汇流排22可以为铜排、铝排等。主体221包括多个汇流件，每个汇流件的两端分别与第一电池单体的第一电极、第二电池单体的第二电极电性连接，第一电池单体和第二电池单体为多个电池单体中在串联连接的方向上相邻的两个电池单体，第一电极和第二电极极性相反，第三电池单体、第四电池单体等依次类推，由于此为本领域公知常识，本申请在此不详细赘述。连接于第一电池单体的汇流件连接第一延伸段2221，连接最后一个电池单体的汇流件连接第二延伸段2222，第一延伸段2221和第二延伸段2222极性相反。
其中，巴片31连接于控制板32朝向电池组21的一侧，巴片31包括第一巴片311和第二巴片312，第一巴片311和第一延伸段2221极性相同，第二巴片312和第二延伸段2222极性相同。如第一巴片311为负极，连接于同为负极的第一延伸段2221，第二巴片312为正极，连接于同为正极的第二延伸段2222。电池包100还包括多个紧固件60，紧固件60可以为螺钉、螺栓、螺柱等。使用紧固件60连接的汇流排22和巴片31，安装方便、容易拆卸，并且连接的可靠性和稳定性更高。具体地，第二开口42有至少两个，每一紧固件60穿设于一个第二开口42。第二开口42设置于隔离板40的一侧，且与第一开口41间隔设置。第二开口42的大小、形状可以根据实际情况设置，以保证紧固件60可以穿设于第二开口42。其中，第一巴片311开设有第一通孔313，第一延伸段2221开设有第一过孔，第一巴片311贴设于第一延伸段2221，一个紧固件60穿设于第一通孔313和第一过孔，以固定第一巴片311和第一延伸段2221；第二巴片312开设有第二通孔314，第二延伸段2222开设有第二过孔，第二巴片312贴设于第二延伸段2222，一个紧固件60穿设于第二通孔314和第二过孔，以固定第二巴片312和第二延伸段2222。
在一些实施例中，隔离板40包括围绕第二开口42的第二内壁421，紧固件60和第二内壁421密封连接。密封连接可以防止热失控产生的高温气体、高温喷射物沿着第二开口42的空隙传递到BMS模组30，增加BMS模组30的安全性。具体地，一个紧固件60固定第一延伸段2221和第一巴片311后，通过密封结构密封连接于第二内壁421；一个紧固件60固定第二延伸段2222和第二巴片312后，通过密封结构密封连接于第二内壁421。紧固件60和第二内壁421之间可以通过密封胶、密封圈、密封带等结构连接，如采用密封胶粘设于紧固件60和第二内壁421之间。可以理解的，本领域技术人员可以采取其他方式使紧固件60密封连接于第二内壁421，本申请在此不做限定。
请继续参阅图6-图7，图6是本申请的实施例提供的电池包沿A-A的剖视图。图7是本申请的实施例提供的电池包的俯视图2。在一些实施例中，BMS模组30包括盖体33，盖体33包括朝向壳体10的第一连接边331，壳体10包括底壁11和围设于底壁11的壳壁12，壳壁12还包括朝向盖体33的第二连接边14，第二连接边14环绕隔离板40设置。具体地，壳壁12包括朝向BMS模组30的端面，第二连接边14连接于端面的周缘，当隔离板40设置在壳体开口13处，隔离板40与第一连接边331位于同一平面，当隔离板40设置在容纳空间101内，隔离板40低于第一连接边331设置。其中，第一连接边331和第二连接边14相适配，当盖体33盖设于壳体10后，第一连接边331和第二连接边14密封连接，第一连接边331和第二连接边14可以通过螺钉、螺栓、螺栓等紧固结构在四周紧固连接。本领域技术人员还可以采用插接、卡接等方式连接盖体33和壳体10，本申请在此不做限定。
在一些实施例中，壳体10还包括垫圈141，第二连接边14内设有凹槽，垫圈141设于凹槽内，盖体33包括凸起，凸起连接于第一连接边331且向壳体10凸出设置，当盖体33盖设于壳体10时，凸起嵌入垫圈141，以增加盖体33和壳体10的密封效果。

Claims (10)

  1. 一种电池包(100)，包括：
    壳体(10)，所述壳体(10)内设有容纳空间(101)；
    电池模组(20)，所述电池模组(20)设置于所述容纳空间(101)内；
    BMS模组(30)，与所述电池模组(20)间隔设置；
    隔离板(40)，设置于电池模组(20)和BMS模组(30)之间，并与所述壳体(10)密封连接，以隔离电池模组(20)和BMS模组(30)。
  2. 根据权利要求1所述的电池包(100)，其中，所述壳体(10)包括底壁(11)和壳壁(12)，所述壳壁(12)围设于所述底壁(11)的周缘以形成所述容纳空间(101)，所述壳壁(12)远离所述底壁(11)的一端设有壳体(10)开口，所述隔离板(40)设于所述壳体(10)开口，且所述隔离板(40)的周缘与所述壳壁(12)密封连接。
  3. 根据权利要求2所述的电池包(100)，所述电池包(100)还包括密封胶层，所述密封胶层密封连接于所述隔离板(40)和所述壳壁(12)的连接处。
  4. 根据权利要求2所述的电池包(100)，所述电池包(100)还包括密封圈(50)，所述密封圈(50)套设于所述隔离板(40)，并抵接于所述壳壁(12)和所述隔离板(40)之间。
  5. 根据权利要求1所述的电池包(100)，其中，所述隔离板(40)设置于所述容纳空间(101)内，且将所述容纳空间(101)分隔为第一腔室和第二腔室，所述BMS模组(30)设于所述第一腔室，所述电池模组(20)设置所述第二腔室，所述隔离板(40)周缘和所述壳体(10)密封连接。
  6. 根据权利要求1-5中任一项所述的电池包(100)，其中，所述隔离板(40)开设有第一开口(41)，所述电池包(100)还包括连接线(70)，所述连接线(70)穿设于所第一开口(41)，所述连接线(70)的一端连接于所述电池模组(20)，所述连接线(70)的另一端连接于所述BMS模组(30)。
  7. 根据权利要求6所述的电池包(100)，其中，所述隔离板(40)包括围绕所述第一开口(41)的第一内壁(411)，所述连接线(70)和所述第一内壁(411)密封连接。
  8. 根据权利要求1-5任一项所述的电池包(100)，所述BMS模组(30)包括巴片(31)和控制板(32)，所述巴片(31)连接于所述控制板(32)朝向所述电池模组(20)的一侧，所述巴片(31)开设有通孔；
    所述电池模组(20)包括电池组(21)和连接于所述电池组(21)的汇流排(22)，所述汇流排(22)开设有和所述通孔对应的过孔；
    所述电池包(100)还包括紧固件(60)，所述隔离板(40)设有第二开口(42)，所述紧固件(60)穿设于所述第二开口(42)、所述通孔和所述过孔，以固定所述巴片(31)和汇流排(22)。
  9. 根据权利要求8所述的电池包(100)，其中，所述隔离板(40)包括围绕所述第二开口(42)的第二内壁(421)，所述紧固件(60)和所述第二内壁(421)密封连接。
  10. 根据权利要求1所述的电池包(100)，所述BMS模组(30)包括盖体(33)，所述盖体(33)包括朝向所述壳体(10)的第一连接边(331)，所述壳体(10)包括底壁(11)和围设于所述底壁(11)的壳壁(12)，所述壳壁(12)包括朝向所述盖体(33)的第二连接边(14)，所述第二连接边(14)环绕所述隔离板(40)设置，所述第一连接边(331)和所述第二连接边(14)密封连接。
PCT/CN2024/118222 2024-03-27 2024-09-11 电池包 Pending WO2025200317A1 (zh)

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