WO2019148612A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2019148612A1
WO2019148612A1 PCT/CN2018/080687 CN2018080687W WO2019148612A1 WO 2019148612 A1 WO2019148612 A1 WO 2019148612A1 CN 2018080687 W CN2018080687 W CN 2018080687W WO 2019148612 A1 WO2019148612 A1 WO 2019148612A1
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WO
WIPO (PCT)
Prior art keywords
battery module
plate
output
output pole
module according
Prior art date
Application number
PCT/CN2018/080687
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English (en)
French (fr)
Inventor
王良诣
陈亮美
马林
刘杨
秦峰
章华
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2019148612A1 publication Critical patent/WO2019148612A1/zh

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    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery 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 field of battery technologies, and in particular, to a battery module.
  • the present application provides a battery module capable of improving the insulation effect of the insulation protection structure and improving the safety of use of the battery module while ensuring the energy density of the battery.
  • the application provides a battery module including:
  • a module housing having a side wall
  • An insulation protection structure includes a protection base, the protection base includes a back plate, the back plate is mounted on the side wall, and the back plate has a first surface and a first surface disposed opposite to each other in a thickness direction thereof Two sides, the second surface faces the side wall, and a groove recessed away from the side wall is disposed at an edge of the second surface;
  • An output pole assembly includes an output pole tab, the output pole tab being in conformity with the first face.
  • the protection base further includes a first side plate, a second side plate and a bottom plate, the first side plate is opposite to the second side plate, the first side plate, the second side plate, the The bottom plate and the back plate are connected to define a cavity having a top opening and a front opening, the first surface is an inner wall surface of the cavity, and the second surface is an outer wall surface of the cavity, and The groove is provided at a top edge of the second face.
  • the groove extends from a portion of the second face that is connected to the first side panel to a portion that is connected to the second side panel.
  • the insulating protection structure further comprises a protective housing, the protective housing being detachably connected to the protective base, the protective housing being buckled to the front opening and the top opening.
  • the first side plate and the second side plate are respectively provided with a first engaging portion, and the protective housing is provided with a second engagement with the first engaging portion. unit.
  • the first engaging portion is a hook or a buckle
  • the second engaging portion is a card slot
  • the output pole assembly further includes a connecting plate, the connecting plate is located in the cavity and mounted on the bottom plate, the connecting plate is connected to the output pole connecting piece, and the connecting plate is disposed There are fixed holes.
  • the connecting plate is integrally connected with the output pole connecting piece.
  • the protective base is a unitary structure.
  • the back plate is provided with an output hole
  • a portion of the side wall is recessed away from the inner portion of the module housing to form a relief groove, and the escape groove is provided with a through hole, and the through hole and the output hole are opposite to each other in a thickness direction of the side wall Setting
  • the output pole assembly further includes an output pole, the output pole is located in the escape slot, and one end of the output pole sequentially passes through the through hole and the output hole and is connected to the output pole connection.
  • the battery module provided by the present application can increase the creepage distance between the output connecting piece and the module outer casing by providing a groove at the edge of the second surface of the backing plate of the protective base, thereby alleviating the short time
  • the insulation failure of the battery module caused by overvoltage or environmental factors improves the insulation effect of the insulation protection structure and improves the safety of use of the battery module.
  • FIG. 1 and FIG. 2 are schematic structural diagrams of a protection base in an insulation protection structure in a battery module according to an embodiment
  • FIG. 3 is a schematic structural diagram of a battery module according to the embodiment.
  • FIG. 5 is a schematic structural view of an insulation protection structure in a battery module according to the embodiment.
  • the embodiment of the present application provides a battery module including an output pole assembly having an output pole connecting piece 16, a module housing 14 having a sidewall 140, and an insulation protection structure.
  • the insulating protection structure may be disposed between the output pole connecting piece 16 and the module outer casing 14, and the insulating protective structure is mounted on the outer wall surface of the module outer casing 14 by installing the insulating protective structure outside the module outer casing 14.
  • the insulation protection structure can be avoided to occupy the space inside the module casing 14, so as to ensure the volumetric energy density and the mass energy density of the battery module, and meet the requirements of electrical safety protection.
  • the insulation protection structure includes a protection base 12 including a back plate 120, the back plate 120 is mounted on the side wall 140, and the back plate 120 has a first surface 120a and a second oppositely disposed along the thickness direction thereof.
  • the first surface 120a is in contact with the output pole connecting piece 16
  • the second surface 120b is facing the side wall 140 of the module housing 14, and the edge of the second surface 120b is provided with a recess recessed away from the side wall 140.
  • Slot 120ba By providing the recess 120ba at the edge of the second surface 120b of the backing plate 120 of the shield base 12, the creepage distance between the output pole piece 16 and the module housing 14 can be increased (the creepage distance is the number in FIG. The path indicated by A) can alleviate the insulation failure of the battery module due to short-time overvoltage or environmental factors, improve the insulation effect of the insulation protection structure and the safety of the battery module.
  • the protection base 12 further includes a first side plate 121, a second side plate 122, and a bottom plate 123.
  • the first side plate 121 is opposite to the second side plate 122.
  • the first side plate 121 and the first side plate 121 The two side plates 122, the bottom plate 123 and the back plate 120 are connected to define a cavity 124 having a top opening 125 and a front opening 126.
  • the protective base 12 can be a unitary structure, that is, the first side plate. 121.
  • the second side plate 122, the bottom plate 123 and the back plate 120 are integrally connected to ensure the structural strength of the protection base 12.
  • the first surface 120a of the back plate 120 is an inner wall surface of the cavity 124 of the protection base 12, that is, the output connection piece 16 is mounted in the cavity 124 of the protection base 12, so that the output connection piece 16 can be improved.
  • the second surface 120b of the backing plate 120 is an outer wall surface of the cavity 124.
  • the outer wall surface is attached to the side wall 140 of the module housing 14 except for the portion for forming the recess 120ba. The aspect ensures the installation stability between the protection base 12 and the module housing 14, and on the other hand reduces the space occupied by the battery module.
  • the creepage distance between the output connecting piece 16 and the module outer casing 14 can be increased, thereby alleviating overvoltage or environment due to short time.
  • the insulation failure of the battery module caused by the factors improves the insulation effect of the insulation protection structure and improves the safety of use of the battery module.
  • the output pole connecting piece 16 can be installed in the cavity 124 through the front opening 126, and the top opening 125 can facilitate the output connecting piece 16 and the external connecting piece (for example, the conductive wire for connecting with the charging post) ) Perform a fixed operation.
  • the output pole assembly further includes a connecting plate 128 connected to the output pole connecting piece 16.
  • the connecting plate 128 is located in the cavity 124 and is mounted on the bottom plate 123.
  • the connecting plate 128 is provided with a fixing hole 128a, and the outer portion.
  • a connector (not shown) can enter the cavity 124 through the top opening 125, and the operator can extend a fixture (eg, a mounting bolt) from the top opening 125 when the external connector enters the cavity 124.
  • the cavity 124 is matched with the fixing hole 128a to achieve a fixed connection between the bottom plate 123 and the connecting plate 128, thereby connecting the output connecting piece 16 and the bottom plate to stably mount the output connecting piece 16 in the cavity. 124 inside.
  • the connecting plate 128 is integrally connected with the output connecting piece 16 to improve the connection strength between the connecting plate 128 and the output connecting piece, and improve the stability of use of the output pole assembly.
  • a recess 120ba may be provided at the top edge of the second surface 120b to improve the insulation protection. The insulation effect of the structure improves the safety of the use of the battery module.
  • the groove 120ba extends from a portion of the second surface 120b that is connected to the first side plate 121 to a portion that is connected to the second side plate 122, such that the top of the output pole piece 16 is surrounded by the module housing.
  • the creepage distance between 14 is increased, thereby further improving the insulation efficiency of the insulation protection structure and improving the safety of use of the battery module.
  • the insulation protection structure further includes a shield housing 13 that is detachably coupled to the shield base 12 when the output pole piece 16 is mounted to the cavity 124. Thereafter, the protective casing 13 can be buckled to the front opening 126 and the top opening 125 of the cavity 124 to protect the output connecting piece 16 located in the cavity 124, thereby improving the use of the output connecting piece 16. safety.
  • first side plate 121 and the second side plate 122 of the protection base 12 are respectively provided with a first engaging portion 127, and the shielding case 13 is disposed with the first engaging portion 127.
  • the second engaging portion 130 that is, the protective housing and the protective base 12 are connected by being engaged, thereby effectively improving the disassembly and assembly efficiency of the protective housing and the protective base 12.
  • the first engaging portion 127 is a hook or a buckle, and the design not only improves the disassembly and assembly efficiency of the protective casing and the protective base 12, but also improves the structural strength of the protective base 12.
  • the second engaging portion 130 can be a card slot to ensure the locking stability of the first engaging portion 127 and the second engaging portion 130 and improve the connection strength between the protective base 12 and the protective housing 13 .
  • the second engaging portion may be a claw as long as it can be quickly engaged with the first engaging portion 127.
  • the output pole assembly further includes an output pole 18, the battery module further includes a plurality of batteries (not shown), each battery is located inside the module housing 14, and the output pole 18 is used to implement the module.
  • the back plate 120 is provided with an output hole
  • the side wall 140 is provided with a through hole
  • the through hole and the output hole are oppositely disposed in the thickness direction of the side wall 140, wherein one end of the output pole 18 sequentially passes through the through hole and The output aperture is connected to the output pole connection piece 16, and the other end of the output pole 18 is connected to each battery.
  • a portion of the side wall 140 of the module housing 14 is recessed away from the interior of the module housing 14 to form a relief slot 140a.
  • the escape slot 140a is provided with an output pole 18, that is, the output pole 18 It is located in the escape groove 140a. The design prevents the output pole 18 from occupying the space of each battery, thereby ensuring the energy density of the battery module.
  • the perforation may be opened in the escape groove 140a.
  • the inner wall surface of the escape groove 140a is recessed with respect to the inner wall surface of the other portion of the side wall 140, and the outer wall surface of the escape groove 140a protrudes from the outer wall surface of the other portion of the side wall 140, so that the design The structural strength of the module housing 14 can be ensured.
  • the second surface 120b of the back plate 120 of the protection base 12 may be disposed to match the outer wall surface of the side wall 140.
  • the assembly stability between the shield base 12 and the module housing 14 is improved.
  • the output pole piece 16 has a Z-shaped bending surface
  • the first surface 120a of the backing plate 120 also forms a Z-shaped bending surface and cooperates with the output pole connecting piece 16, so that the output connection can be improved. Assembly stability of the sheet 16 and the guard base 12.
  • the shape of the first surface 120a and the second surface 120b of the backing plate 120 can be changed according to the shape of the bonded output pole connecting piece 16 and the side wall 140 of the module housing 14.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池模组，涉及电池技术领域。其包括具有侧壁(140)的模组外壳(14)、绝缘防护结构及输出极组件，所述绝缘防护结构包括防护底座(12)，所述防护底座(12)包括安装在所述侧壁(140)上的背板(120)，所述背板(120)具有沿自身厚度方向相对设置的第一面(120a)及第二面(120b)，所述第二面(120b)朝向所述侧壁(140)，且所述第二面(120b)的边缘处设置有向远离所述侧壁(140)的方向凹陷的凹槽(120ba)；所述输出极组件包括与所述第一面(120a)相贴合的输出极连接片(16)。该技术方案中，通过在防护底座(12)的背板(120)的第二面(120b)的边缘处设置凹槽(120ba)，可增加输出极连接片(16)与模组外壳(14)之间的爬电距离，从而可缓解由于短时间的过电压或者环境等因素造成的电池模组绝缘失效的情况，提高了绝缘防护结构的绝缘效果，提高了电池模组的使用安全性。

Description

电池模组 技术领域
本申请涉及电池技术领域，尤其涉及一种电池模组。
背景技术
近年来新能源汽车行业飞速发展，电池作为新能源汽车的核心部分，引起了行业的广泛关注。由于市场的需求，电池的能量密度要求越来越高，但随着电池能量密度越来越高，电池内部电压由于导体周围的绝缘材料被电极化，导致绝缘材料呈现带电现象，降低了绝缘效果，从而降低了电池模组的安全性。
发明内容
本申请提供了一种电池模组，在保证自身能量密度的同时，还能够提高绝缘防护结构的绝缘效果以及提高电池模组的使用安全性。
本申请提供了一种电池模组，其包括：
具有侧壁的模组外壳；
绝缘防护结构，所述绝缘防护结构包括防护底座，所述防护底座包括背板，所述背板安装在所述侧壁上，所述背板具有沿自身厚度方向相对设置的第一面及第二面，所述第二面朝向所述侧壁，且所述第二面的边缘处设置有向远离所述侧壁的方向凹陷的凹槽；
输出极组件，所述输出极组件包括输出极连接片，所述输出极连接片与所述第一面相贴合。
优选地，
所述防护底座还包括第一侧板、第二侧板及底板，所述第一侧板与所述第二侧板相对设置，所述第一侧板、所述第二侧板、所述底板及所述背板连接以围成具有顶部开口及前部开口的腔体，所述第一面为所述腔体的内壁面，所述第二面为所述腔体的外壁面，且所述第二面的顶边缘处设置 有所述凹槽。
优选地，所述凹槽从所述第二面上与所述第一侧板连接的部分延伸至与所述第二侧板连接的部分。
优选地，所述绝缘防护结构还包括防护壳体，所述防护壳体与所述防护底座可拆卸地连接，所述防护壳体罩扣至所述前部开口及所述顶部开口。
优选地，所述第一侧板及所述第二侧板上均设置有第一卡合部，所述防护壳体上设置有与所述第一卡合部相卡合的第二卡合部。
优选地，所述第一卡合部为卡钩或卡扣，所述第二卡合部为卡槽。
优选地，所述输出极组件还包括连接板，所述连接板位于所述腔体内并安装在所述底板上，所述连接板与所述输出极连接片连接，且所述连接板上设置有固定孔。
优选地，所述连接板与所述输出极连接片呈一体式连接。
优选地，所述防护底座为一体式结构。
优选地，所述背板上设置有输出孔；
所述侧壁的一部分向远离所述模组外壳内部的方向凹陷以形成避让槽，所述避让槽上开设有穿孔，所述通孔与所述输出孔在所述侧壁的厚度方向上相对设置；
所述输出极组件还包括输出极柱，所述输出极柱位于所述避让槽内，且所述输出极柱的一端依次穿过所述穿孔及所述输出孔并与所述输出极连接片连接。
本申请提供的技术方案可以达到以下有益效果：
本申请所提供的电池模组，通过在防护底座的背板的第二面的边缘处设置凹槽，可增加输出极连接片与模组外壳之间的爬电距离，从而可缓解由于短时间的过电压或者环境等因素造成的电池模组绝缘失效的情况，提高了绝缘防护结构的绝缘效果，提高了电池模组的使用安全性。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1和图2为本实施例所提供的电池模组中，绝缘防护结构中的防护底座的结构示意图；
图3为本实施例所提供的电池模组的结构示意图；
图4为本实施例所提供的电池模组的局部剖视示意图；
图5为本实施例所提供的电池模组中绝缘防护结构的结构示意图。
附图标记：
12-防护底座；
120-背板；
120a-第一面；
120b-第二面；
120ba-凹槽；
121-第一侧板；
122-第二侧板；
123-底板；
124-腔体；
125-顶部开口；
126-前部开口；
127-第一卡合部；
13-防护壳体；
130-第二卡合部；
128-连接板；
128a-固定孔；
14-模组外壳；
140-侧壁；
140a-避让槽；
16-输出极连接片；
18-输出极柱。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。
如图1至图5所示，本申请实施例提供了一种电池模组，该电池模组包括具有输出极连接片16的输出极组件、具有侧壁140的模组外壳14以及绝缘防护结构，其中，绝缘防护结构可设置在输出极连接片16与模组外壳14之间，且绝缘防护结构安装在模组外壳14的外壁面上，通过将绝缘防护结构安装在模组外壳14的外壁面上，可避免绝缘防护结构占用模组外壳14内的空间，以在保证电池模组的体积能量密度和质量能量密度的同时，又可以满足电气安全防护的要求。
具体地，绝缘防护结构包括防护底座12，该防护底座12包括背板120，该背板120安装在侧壁140上，且背板120具有沿自身厚度方向相对设置的第一面120a及第二面120b，第一面120a与输出极连接片16贴合，第二面120b朝向模组外壳14的侧壁140，且第二面120b的边缘处设置有向远离侧壁140的方向凹陷的凹槽120ba。通过在防护底座12的背板120的第二面120b的边缘处设置凹槽120ba，可增加输出极连接片16与模组外壳14之间的爬电距离(该爬电距离为图4中标号A处所指的路径)，从而可缓解由于短时间的过电压或者环境等因素造成的电池模组绝缘失效的情况，提高了绝缘防护结构的绝缘效果以及电池模组的使用安全性。
如图1和图2所示，防护底座12还包括第一侧板121、第二侧板122及底板123，第一侧板121与第二侧板122相对设置，第一侧板121、第二侧板122、底板123及背板120连接以围成具有顶部开口125及前部开口126的腔体124，优选地，该防护底座12可为一体式结构，也就是说，第一侧板121、第二侧板122、底板123及背板120呈一体式连接，以保证防护底座12的结构强度。
上述背板120的第一面120a为防护底座12的腔体124的内壁面，也就是说，输出极连接片16安装在防护底座12的腔体124内，这样设计可提高输出极连接片16的使用安全性，而背板120的第二面120b为腔体124的外壁面，该外壁面上除了用于形成凹槽120ba以外的其它部分与模组外壳14的侧壁140贴合，一方面保证了防护底座12与模组外壳14之间的 安装稳定性，另一方面减小了电池模组所占用的空间。
另外，通过设置第一侧板121、第二侧板122及底板123还可增加输出极连接片16与模组外壳14之间的爬电距离，从而可缓解由于短时间的过电压或者环境等因素造成的电池模组绝缘失效的情况，提高了绝缘防护结构的绝缘效果，提高了电池模组的使用安全性。
需要说明的是，上述输出极连接片16可通过前部开口126安装在腔体124内，而顶部开口125可方便输出极连接片16与外部连接件(例如用于与充电桩连接的导电线)进行固定操作。
如图3所示，输出极组件还包括与输出极连接片16连接的连接板128，连接板128位于腔体124内并安装在底板123上，该连接板128上设置有固定孔128a，外部连接件(图中未示出)可通过顶部开口125进入到腔体124内，在外部连接件进入到腔体124内时，操作人员可将固定件(例如固定螺栓)从顶部开口125伸入至腔体124内并与固定孔128a相配合，以实现底板123与连接板128的固定连接，从而实现输出极连接片16与底板的连接，以将输出极连接片16稳定地安装在腔体124内。
优选地，连接板128与输出极连接片16呈一体式连接，以提高连接板128与输出极连接片的连接强度，提高输出极组件的使用稳定性。
由于上述防护底座12具有顶部开口125，为了增加输出极连接片16的顶部与模组外壳14之间的爬电距离，可在第二面120b的顶边缘处设置凹槽120ba，以提高绝缘防护结构的绝缘效果，从而提高电池模组的使用安全性。
可选地，凹槽120ba从第二面120b上与第一侧板121连接的部分延伸至与第二侧板122连接的部分，这样设计使得输出极连接片16的顶部各处与模组外壳14之间的爬电距离均得以增加，从而进一步提高绝缘防护结构的绝缘效率，提高电池模组的使用安全性。
在本申请的一个实施例中，如图5所示，绝缘防护结构还包括防护壳体13，该防护壳体13与防护底座12可拆卸地连接，当输出极连接片16安装在腔体124后，可将防护壳体13罩扣至腔体124的前部开口126及顶部开口125，以对位于腔体124内的输出极连接片16进行保护，从而可提高输出极连接片16的使用安全性。
可选地，上述防护底座12的第一侧板121及第二侧板122上均设置有第一卡合部127，而防护壳体13上设置有与第一卡合部127相卡合的第二卡合部130，也就是说，该防护壳体与防护底座12通过卡合的方式进行连接，有效提高了防护壳体与防护底座12的拆装效率。
优选地，第一卡合部127为卡钩或卡扣，这样设计不仅可以提高防护壳体与防护底座12的拆装效率，而且还可提高防护底座12的结构强度。而第二卡合部130可为卡槽，以保证第一卡合部127与第二卡合部130的卡合稳定性，提高防护底座12与防护壳体13之间的连接强度。
需要说明的是，该第二卡合部也可为卡爪，只要能够与第一卡合部127进行快速卡合即可。
可选地，输出极组件还包括输出极柱18，电池模组还包括多个电池(图中未示出)，各电池位于模组外壳14的内部，而输出极柱18用于实现模组外壳14内各电池与安装在防护底座12上的输出极连接片16之间的连接。具体地，背板120上设置有输出孔，而侧壁140上设置有穿孔，该穿孔与输出孔在侧壁140的厚度方向上相对设置，其中，输出极柱18的一端依次穿过穿孔及输出孔并与输出极连接片16连接，而输出极柱18的另一端与各电池连接。
优选地，模组外壳14的侧壁140的一部分向远离模组外壳14内部的方向凹陷以形成避让槽140a，该避让槽140a内设置有输出极柱18，也就是说，该输出极柱18位于避让槽140a内，这样设计可避免输出极柱18占用各电池所在的空间，从而可保证电池模组的能量密度。
需要说明的是，为了方便位于避让槽140a内的输出极柱18与输出极连接片16连接，可将穿孔开设在避让槽140a上。
如图3和图4所示，该避让槽140a的内壁面相对侧壁140上其它部分的内壁面凹陷，该避让槽140a的外壁面相对侧壁140上其它部分的外壁面凸出，这样设计可保证模组外壳14的结构强度。其中，当避让槽140a的外壁面相对侧壁140上其它部分的外壁面凸出时，防护底座12的背板120的第二面120b可设置成与该侧壁140的外壁面相匹配的形状，以保证第二面120b上除了设置凹槽120ba的部位之外的其它部分均与模组外壳14的外壁面相贴合，提高了防护底座12与模组外壳14之间的装配稳定性。 另外，当输出极连接片16具有Z型弯折面时，该背板120的第一面120a亦形成Z型弯折面，并与输出极连接片16相配合，这样设计可提高输出极连接片16与防护底座12的装配稳定性。
由上述可知，该背板120的第一面120a和第二面120b的形状可根据贴合的输出极连接片16及模组外壳14的侧壁140的形状而发生改变。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种电池模组，其特征在于，包括：
    具有侧壁的模组外壳；
    绝缘防护结构，所述绝缘防护结构包括防护底座，所述防护底座包括背板，所述背板安装在所述侧壁上，所述背板具有沿自身厚度方向相对设置的第一面及第二面，所述第二面朝向所述侧壁，且所述第二面的边缘处设置有向远离所述侧壁的方向凹陷的凹槽；
    输出极组件，所述输出极组件包括输出极连接片，所述输出极连接片与所述第一面相贴合。
  2. 根据权利要求1所述的电池模组，其特征在于，
    所述防护底座还包括第一侧板、第二侧板及底板，所述第一侧板与所述第二侧板相对设置，所述第一侧板、所述第二侧板、所述底板及所述背板连接以围成具有顶部开口及前部开口的腔体，所述第一面为所述腔体的内壁面，所述第二面为所述腔体的外壁面，且所述第二面的顶边缘处设置有所述凹槽。
  3. 根据权利要求2所述的电池模组，其特征在于，所述凹槽从所述第二面上与所述第一侧板连接的部分延伸至与所述第二侧板连接的部分。
  4. 根据权利要求2所述的电池模组，其特征在于，所述绝缘防护结构还包括防护壳体，所述防护壳体与所述防护底座可拆卸地连接，所述防护壳体罩扣至所述前部开口及所述顶部开口。
  5. 根据权利要求4所述的电池模组，其特征在于，所述第一侧板及所述第二侧板上均设置有第一卡合部，所述防护壳体上设置有与所述第一卡合部相卡合的第二卡合部。
  6. 根据权利要求5所述的电池模组，其特征在于，所述第一卡合部为卡钩或卡扣，所述第二卡合部为卡槽。
  7. 根据权利要求2所述的电池模组，其特征在于，所述输出极组件还包括连接板，所述连接板位于所述腔体内并安装在所述底板上，所述连接板与所述输出极连接片连接，且所述连接板上设置有固定孔。
  8. 根据权利要求7所述的电池模组，其特征在于，所述连接板与所述输出极连接片呈一体式连接。
  9. 根据权利要求2所述的电池模组，其特征在于，所述防护底座为一体式结构。
  10. 根据权利要求1至9中任一项所述的电池模组，其特征在于，
    所述背板上设置有输出孔；
    所述侧壁的一部分向远离所述模组外壳内部的方向凹陷以形成避让槽，所述避让槽上开设有穿孔，所述通孔与所述输出孔在所述侧壁的厚度方向上相对设置；
    所述输出极组件还包括输出极柱，所述输出极柱位于所述避让槽内，且所述输出极柱的一端依次穿过所述穿孔及所述输出孔并与所述输出极连接片连接。
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