WO2018157557A1 - Battery module - Google Patents

Battery module Download PDF

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Publication number
WO2018157557A1
WO2018157557A1 PCT/CN2017/097055 CN2017097055W WO2018157557A1 WO 2018157557 A1 WO2018157557 A1 WO 2018157557A1 CN 2017097055 W CN2017097055 W CN 2017097055W WO 2018157557 A1 WO2018157557 A1 WO 2018157557A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery module
top cover
module according
voltage sampling
Prior art date
Application number
PCT/CN2017/097055
Other languages
French (fr)
Chinese (zh)
Inventor
秦峰
游志毅
朱涛声
马林
肖信福
王娟
张捷
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2018157557A1 publication Critical patent/WO2018157557A1/en

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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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
    • 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
    • H01M50/291—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 characterised by their shape
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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 utility model belongs to the field of batteries, and more particularly, the utility model relates to a battery module.
  • the soft pack battery is a high-performance battery that can be charged and discharged at a large rate and has a long service life. Therefore, it is widely used in various fields such as new energy vehicles, electric vehicles, and electric tools.
  • Existing soft-packed batteries use aluminum-plastic film to package bare cells, and there are some defects: for example, the insulation withstand voltage cannot meet the demand, and the secondary package on the side of the output ear and the degassed secondary package are not tightly sealed. The problem is easy to cause the battery to leak, which seriously affects the safety of the battery.
  • the grouping and fixing of batteries is the key point and difficulty in the development of battery modules.
  • the current common practice is to use a bracket with a special structure to fix the position of the battery core and then make electrical connections between the batteries.
  • the disadvantage of the method is that the structure of the bracket is complicated, the precision is high, the assembly process is complicated, and the production cost is increased.
  • the packaged aluminum plastic film will rub against the bracket, which will easily cause the aluminum plastic film to rupture, thereby causing damage to the battery.
  • the side of the aluminum-plastic film package is not allowed to bend at the edge of the ear, which causes a large space waste, which reduces the energy density of the battery and limits the softness. Pack battery application.
  • the purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery module with high safety performance and high energy density to replace the existing square-shell electric core module and soft-package battery core module structure to overcome the problem.
  • the core energy density of the shell is low and the safety performance of the soft pack is insufficient.
  • the present invention provides a battery module, including:
  • the battery pack is housed in a battery case, the battery pack includes a plurality of single cells, and the single cells are provided with a tab and an output pole electrically connected to the tab;
  • a top cover that is sealingly connected to the battery case
  • a gap between the battery pack and the battery case is filled with potting glue.
  • the unit cell includes an encapsulating film that seals the tabs of the unit cell and forms an edge seal.
  • the encapsulation film is a plastic film or an electrolyte-resistant insulating material film.
  • the encapsulating film forms a bent edge seal after sealing the tab.
  • the top cover is provided with an explosion-proof valve and a voltage sampling terminal through hole.
  • the voltage sampling terminal through hole corresponds to a voltage sampling terminal disposed on the connecting piece, and when the top cover is sealedly connected with the battery case, the voltage sampling terminal is sealed and installed at the voltage sampling terminal through The voltage sampling terminal through hole is at least partially extended in the hole.
  • the battery case and the top cover are made of a metal material, and the battery case and the top cover are connected by welding.
  • the battery case and the top cover are made of aluminum.
  • the battery module further includes:
  • Insulation pad located between adjacent cells
  • Adapter piece made of conductive material, as the total positive or total negative output in multiple cells
  • the pole is electrically connected to the pole provided on the top cover;
  • each connecting piece is electrically connected to an output of the corresponding single cell, so that the plurality of single cells are connected in series and/or in parallel.
  • the adapter piece is two, respectively located at the top of two single cells at both ends of the battery pack, one end is electrically connected to the tab on the single cell, and the other end is fixed. On the insulation mat.
  • the battery module of the present invention encapsulates the battery core through a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed in the battery case by using a potting glue, which has the following advantages:
  • the sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.
  • FIG. 1 is an exploded perspective view of a battery module of the present invention.
  • FIG. 2 is a schematic structural view of a single battery in the battery module of the present invention.
  • FIG. 3 is a partial assembly view of the battery module of the present invention.
  • FIG. 4 is a partial assembly view of the battery module of the present invention.
  • FIG. 5 is a schematic view showing the assembly of the battery module of the present invention.
  • the battery module of the present invention includes:
  • the battery pack 10 is housed in a battery case 20, and the battery pack 10 includes a plurality of unit cells 12, and the unit cells 12 are provided with tabs (not shown) and an output pole 120 electrically connected to the tabs;
  • the top cover 30 is sealingly connected to the battery case 20;
  • the gap between the battery pack 10 and the battery case 20 is filled with potting glue.
  • the battery case 20 is a hollow structure having an opening made of a metal material.
  • the battery case 20 is an aluminum case, and the aluminum case has an ideal denseness, which can prevent external moisture from entering the case and prevent moisture from affecting the performance of the battery module.
  • the battery pack 10 includes a plurality of battery cells 12 arranged in an adjacent manner, and the battery cells 12 are connected by a connecting piece 142.
  • the arrangement of the battery pack 10 is not particularly limited, and may be a battery pack arranged in series or a battery pack arranged in parallel.
  • the connecting piece 142 is made of a conductive material.
  • the connecting piece 142 is respectively provided with a bent portion on both sides according to the structure and shape of the unit cell 12, and the bent portions on both sides and the output poles on the adjacent two single cells 12 respectively.
  • 120 is electrically connected to enable a plurality of unit cells 12 to be connected in series and/or in parallel.
  • a voltage sampling terminal 144 is disposed on the connecting piece 142 and is fixed on the heat insulating pad 14 between the adjacent two unit cells 12.
  • the edge of the heat insulating pad 14 extends to the edge of the unit cell 12, and the heat transfer between the unit cells 12 can be blocked.
  • the arrangement can prevent the cells 12 from affecting each other due to heat, so that the battery module The heat in it is not easy to exceed the limit.
  • Each of the unit cells 12 includes two electrode electrodes 120 of opposite polarity, and the output electrode 120 is located at the top of the unit cell 12, and is made of a conductive material, respectively, with tabs (not shown) on the unit cell 12 and The connecting piece 142 is electrically connected.
  • the battery module further includes two adapter pieces 140, the adapter piece The 140 is made of a conductive material, and two adapter sheets 140 are respectively located at the top of the two unit cells 12 at both ends of the battery pack 10.
  • One end of the adapter piece 140 is electrically connected to a tab (not shown) on the unit cell 12.
  • the other end is fixed to the heat insulating pad 14 to prevent the transfer piece 140 from moving.
  • the adapter piece 140 is mainly electrically connected to the poles 360 on the top cover 30 as the total positive output or the total negative output of the plurality of unit cells 12 to connect the poles 360 and the unit cells 12 corresponding to the top cover 30.
  • the corresponding tabs are electrically connected.
  • each of the unit cells 12 is sealed with an encapsulation film 124 for accommodating the electrolyte and the bare cells (not shown) of the package unit cells 12, and sealing the monomers.
  • the encapsulation film 124 is a plastic film or an electrolyte-resistant insulating material film.
  • the encapsulation film 124 is packaged by a process similar to a soft package to form a battery structure.
  • the battery is encapsulated by a plastic film or an electrolyte-resistant insulating material film.
  • the thickness of the battery core can be much larger than that of a conventional soft-packed battery cell, and the battery capacity can be improved.
  • the plastic film or the electrolyte-resistant insulating material used in the battery core package is blown by a process such as blow molding, and a sealing film of a specific size and shape is blown with the shape of the battery core, and then packaged and formed by a soft-packing edge-sealing process.
  • the invention solves the problem that the traditional soft-package battery core is not tightly sealed and the insulation withstand voltage cannot meet the requirements.
  • the sealing edge 122 formed after sealing can be bent, and due to the excellent properties of the plastic film, even if the sealing edge 122 formed after sealing is bent, the battery core can be completely sealed. It will not cause the battery to leak, and it can also save space and increase the energy density of the battery module.
  • the top cover 30 is made of a metal material.
  • the top cover 30 is made of aluminum, and the top cover 30 is provided with an explosion-proof valve 32 and a voltage sampling terminal through hole 34.
  • the explosion-proof valve 32 is located in the middle of the top cover 30.
  • the explosion-proof valve 32 on the top cover 30 is first broken, and the pressure relief function is achieved through the explosion-proof valve 32, thereby improving The safety performance of the battery module.
  • the voltage sampling terminal through hole 34 is corresponding to the voltage sampling terminal 144 on the connecting piece 142, and the voltage is The sampling terminal 144 extends through the voltage sampling terminal through hole 34 and at least partially extends out of the voltage sampling terminal through hole 34 as a port for voltage sampling, and is sealed and fixed by an insulating rubber ring and a nut.
  • the gap between the battery pack 10 and the battery case 20 is filled with a potting compound having a suitable thermal conductivity and not reacting with the electrolyte, and the potting compound will be housed in the battery case 20
  • the internal battery pack 10 and all components are fixed as a whole, which can significantly improve the anti-vibration performance of the module. Even if the battery module vibrates during use, it will not cause the electrical connection of the component to be broken and affect the battery module. normal operation.
  • the unit cells 12 in the battery pack 10 can be fixed in a fixed position, and not only the unit cells 12 can be prevented from shaking in the battery case 20, but also the unit cells 12 and the battery case 20 can be prevented.
  • the friction between them causes destruction of the unit cell 12.
  • the sealing edge 122 of the sealing film 124 of the unit cell 12 can be further sealed and filled, and even if the sealing edge 122 is not tightly sealed during the bending process, the sealing can be performed by potting.
  • the glue seals the edge seal 122 to prevent electrolyte leakage of the unit cell 12.
  • the potting compound can fill the gaps in the module, so that the heat transfer between the single cells 12 is more uniform, and can also function as heat conduction and heat dissipation, and the temperature is balanced; since the filled potting glue has the characteristics of fire retarding and flame retardancy. Even if the individual cells 12 are damaged or ignited during use, the normal operation of the other cells 12 in the module will not be affected. Filling with potting glue can also improve the insulation performance between the internal components, improve the waterproof and moisture-proof performance of the battery module, and reduce the damage of the battery module due to the rust and rust caused by long-term use.
  • a plurality of unit cells 12 are arranged side by side to form a battery pack 10, and the battery pack 10 is housed in the battery case 20, and two unit cells 12 at both ends of the battery pack 10 are provided.
  • Two adapter plates 140 as total positive output or total negative output are mounted on the top, and the adapter piece 140 is soldered to the poles 360 on the cover plate 30 for electrical connection;
  • a potting glue having a high thermal conductivity and not reacting with the electrolyte is injected into the battery case 20, and the gap inside the battery case 20 is completely filled by the potting glue, and the battery pack 10, the adapter piece 140, and the connecting piece are inserted. 142.
  • the heat insulating pad 14 and the sealing edge 122 are all sealed and fixed in the battery case 20, so that the battery module becomes a whole;
  • the top cover 30 is soldered to the battery case 20, so that the entire battery module is in a sealed state, wherein the voltage sampling terminal through hole 34 on the top cover 30 is sealingly and fixedly connected with the voltage sampling terminal 144, and the voltage sampling terminal 144 is used as a The port for external voltage sampling extends outside the top cover 30.
  • the poles 360 on the top cover 30 are sealed and fixedly connected by the pole-studded aluminum block 361, and finally the entire battery module is sealed and fixed to obtain the required battery module with high protection level.
  • the battery module of the present invention is sealed with a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed to the battery case by using a potting glue.
  • a plastic film or an electrolyte-resistant insulating material film In combination with the above detailed description of the embodiments of the present invention, the battery module of the present invention is sealed with a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed to the battery case by using a potting glue. In vivo, has the following advantages:
  • the sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.

Abstract

A battery module, comprising: a battery housing (20); a battery pack (10) accommodated in the battery housing (20), the battery pack (10) comprising a plurality of battery cells (12), and the battery cells (12) being provided with tabs and output electrodes (120) electrically connected to the tabs; and a top cover (30) sealedly connected to the battery housing (20), wherein a gap between the battery pack (10) and the battery housing (20) is filled with a pouring sealant. According to the battery module, by filling the gap between the battery pack (10) and the battery housing (20) with the pouring sealant, the safety and energy density of the battery module can be significantly improved.

Description

电池模组Battery module 技术领域Technical field
本实用新型属于电池领域，更具体地说，本实用新型涉及一种电池模组。The utility model belongs to the field of batteries, and more particularly, the utility model relates to a battery module.
背景技术Background technique
软包电池是一种高性能的电池，可以大倍率充、放电，具有较长的使用寿命，因此被广泛应用于新能源汽车、电动车、电动工具等各个领域。现有软包电芯多使用铝塑膜对裸电芯进行封装，存在一些缺陷：例如，绝缘耐压无法满足需求，在出极耳的侧边和脱气后的二次封装存在密封不严的问题，容易造成电芯漏液，严重影响电池的安全性。The soft pack battery is a high-performance battery that can be charged and discharged at a large rate and has a long service life. Therefore, it is widely used in various fields such as new energy vehicles, electric vehicles, and electric tools. Existing soft-packed batteries use aluminum-plastic film to package bare cells, and there are some defects: for example, the insulation withstand voltage cannot meet the demand, and the secondary package on the side of the output ear and the degassed secondary package are not tightly sealed. The problem is easy to cause the battery to leak, which seriously affects the safety of the battery.
电芯成组和固定方式是当今电池模组开发的重点和难题，现行通用的做法是采用具有特殊结构的支架，对电芯位置进行固定，然后进行电芯之间的电连接，但是，该做法的缺点是支架结构复杂，且精度要求高，组装工艺复杂，增加了生产成本。此外，当电池在使用过程中发生振动时，封装的铝塑膜会与支架发生摩擦，容易造成铝塑膜破裂，进而导致电池破坏。为了确保铝塑膜封装密封可靠性，铝塑膜封装出极耳的侧边不允许出极耳处封边弯折，这样会造成很大的空间浪费，使得电池的能量密度降低，限制了软包电池的应用。The grouping and fixing of batteries is the key point and difficulty in the development of battery modules. The current common practice is to use a bracket with a special structure to fix the position of the battery core and then make electrical connections between the batteries. However, The disadvantage of the method is that the structure of the bracket is complicated, the precision is high, the assembly process is complicated, and the production cost is increased. In addition, when the battery vibrates during use, the packaged aluminum plastic film will rub against the bracket, which will easily cause the aluminum plastic film to rupture, thereby causing damage to the battery. In order to ensure the reliability of the sealing of the aluminum-plastic film package, the side of the aluminum-plastic film package is not allowed to bend at the edge of the ear, which causes a large space waste, which reduces the energy density of the battery and limits the softness. Pack battery application.
有鉴于此，确有必要提供一种安全性能和能量密度高的电池模组来替代现有的方壳电芯模组和软包电芯模组结构，以克服方壳电芯能量密度较低和软包电芯安全性能不足的问题。In view of this, it is indeed necessary to provide a battery module with high safety performance and high energy density to replace the existing square-shell battery module and soft-pack battery module structure to overcome the low energy density of the square-shell battery core. And the problem of insufficient safety performance of the soft pack battery.
实用新型内容Utility model content
本实用新型的目的在于：克服现有技术的不足，提供一种安全性能和能量密度高的电池模组来替代现有的方壳电芯模组和软包电芯模组结构，以克服方 壳电芯能量密度较低和软包电芯安全性能不足的问题。The purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery module with high safety performance and high energy density to replace the existing square-shell electric core module and soft-package battery core module structure to overcome the problem. The core energy density of the shell is low and the safety performance of the soft pack is insufficient.
为了实现上述目的，本实用新型提供了一种电池模组，包括：In order to achieve the above object, the present invention provides a battery module, including:
电池壳体；Battery housing
电池组，收容于电池壳体中，电池组包括多个单体电池，单体电池设有极耳和与极耳电连接的输出极；以及The battery pack is housed in a battery case, the battery pack includes a plurality of single cells, and the single cells are provided with a tab and an output pole electrically connected to the tab;
顶盖，与电池壳体密封连接；a top cover that is sealingly connected to the battery case;
其中，所述电池组与电池壳体之间的间隙填满灌封胶。Wherein, a gap between the battery pack and the battery case is filled with potting glue.
作为本实用新型电池模组的一种改进，所述单体电池包括封装膜，封装膜密封单体电池的极耳并形成封边。As an improvement of the battery module of the present invention, the unit cell includes an encapsulating film that seals the tabs of the unit cell and forms an edge seal.
作为本实用新型电池模组的一种改进，所述封装膜为塑料膜或耐电解液的绝缘材料膜。As an improvement of the battery module of the present invention, the encapsulation film is a plastic film or an electrolyte-resistant insulating material film.
作为本实用新型电池模组的一种改进，所述封装膜密封极耳后形成弯折封边。As an improvement of the battery module of the present invention, the encapsulating film forms a bent edge seal after sealing the tab.
作为本实用新型电池模组的一种改进，所述顶盖上设有防爆阀和电压采样端子通孔。As an improvement of the battery module of the present invention, the top cover is provided with an explosion-proof valve and a voltage sampling terminal through hole.
作为本实用新型电池模组的一种改进，所述电压采样端子通孔与连接片上设置的电压采样端子对应，顶盖与电池壳体密封连接时，电压采样端子贯穿密封安装于电压采样端子通孔中并至少部分延伸出电压采样端子通孔。As an improvement of the battery module of the present invention, the voltage sampling terminal through hole corresponds to a voltage sampling terminal disposed on the connecting piece, and when the top cover is sealedly connected with the battery case, the voltage sampling terminal is sealed and installed at the voltage sampling terminal through The voltage sampling terminal through hole is at least partially extended in the hole.
作为本实用新型电池模组的一种改进，所述电池壳体和顶盖由金属材料制成，电池壳体和顶盖通过焊接密封连接。As an improvement of the battery module of the present invention, the battery case and the top cover are made of a metal material, and the battery case and the top cover are connected by welding.
作为本实用新型电池模组的一种改进，所述电池壳体和顶盖由铝材制成。As an improvement of the battery module of the present invention, the battery case and the top cover are made of aluminum.
作为本实用新型电池模组的一种改进，所述电池模组还包括：As an improvement of the battery module of the present invention, the battery module further includes:
隔热垫，位于相邻的单体电池之间；Insulation pad, located between adjacent cells;
转接片，由导电材料制成，作为多个单体电池中的总正输出极或总负输出 极与顶盖上设置的极柱电连接；以及Adapter piece, made of conductive material, as the total positive or total negative output in multiple cells The pole is electrically connected to the pole provided on the top cover;
多个带有电压采样端子的导电连接片，各连接片与相应的单体电池的输出极电连接，以使多个单体电池实现串联和/或并联。A plurality of conductive connecting pieces with voltage sampling terminals, each connecting piece is electrically connected to an output of the corresponding single cell, so that the plurality of single cells are connected in series and/or in parallel.
作为本实用新型电池模组的一种改进，所述转接片为两个，分别位于电池组两端两个单体电池的顶部，一端与单体电池上的极耳电连接，另一端固定在隔热垫上。As an improvement of the battery module of the present invention, the adapter piece is two, respectively located at the top of two single cells at both ends of the battery pack, one end is electrically connected to the tab on the single cell, and the other end is fixed. On the insulation mat.
相对于现有技术，本实用新型电池模组通过塑料膜或耐电解液绝缘材料膜封装电芯，使用灌封胶将电池组密封固定在电池壳体内，具有以下优点：Compared with the prior art, the battery module of the present invention encapsulates the battery core through a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed in the battery case by using a potting glue, which has the following advantages:
1)固定电池组位置，防止电池组与电池壳体摩擦，防止电池封装材料破裂；1) Fix the position of the battery pack to prevent the battery pack from rubbing against the battery case and prevent the battery package material from rupturing;
2)电池极耳处的密封边可进行弯折，可以节省空间，提高电池模组的能量密度。2) The sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.
附图说明DRAWINGS
下面结合附图和具体实施方式，对本实用新型电池模组及其有益效果进行详细说明，其中：The battery module of the present invention and its beneficial effects are described in detail below with reference to the accompanying drawings and specific embodiments, wherein:
图1为本实用新型电池模组的分解示意图。1 is an exploded perspective view of a battery module of the present invention.
图2为本实用新型电池模组中单体电池的结构示意图。2 is a schematic structural view of a single battery in the battery module of the present invention.
图3为本实用新型电池模组的局部组装示意图。3 is a partial assembly view of the battery module of the present invention.
图4为本实用新型电池模组的局部组装示意图。4 is a partial assembly view of the battery module of the present invention.
图5为本实用新型电池模组的组装示意图。FIG. 5 is a schematic view showing the assembly of the battery module of the present invention.
具体实施方式detailed description
为了使本实用新型的目的、技术方案和有益技术效果更加清晰，以下结合附图和具体实施方式，对本实用新型进行进一步详细说明。应当理解的是，本说明书中描述的具体实施方式仅仅是为了解释本实用新型，并不是为了限定本 实用新型。In order to make the objects, technical solutions and beneficial technical effects of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in the specification are merely illustrative of the invention and are not Utility model.
请参阅图1至图5所示，本实用新型电池模组包括：Referring to FIG. 1 to FIG. 5, the battery module of the present invention includes:
电池壳体20； Battery housing 20;
电池组10，收容于电池壳体20中，电池组10包括多个单体电池12，单体电池12设有极耳(未示出)和与极耳电连接的输出极120；以及The battery pack 10 is housed in a battery case 20, and the battery pack 10 includes a plurality of unit cells 12, and the unit cells 12 are provided with tabs (not shown) and an output pole 120 electrically connected to the tabs;
顶盖30，与电池壳体20密封连接；The top cover 30 is sealingly connected to the battery case 20;
其中，电池组10与电池壳体20之间的间隙填满灌封胶。The gap between the battery pack 10 and the battery case 20 is filled with potting glue.
电池壳体20为具有开口的中空结构，由金属材料制成。在图示实施方式中，电池壳体20为铝壳，铝壳具有理想的致密性，能够阻止外部的水汽进入壳体内，避免水汽影响电池模组的性能。The battery case 20 is a hollow structure having an opening made of a metal material. In the illustrated embodiment, the battery case 20 is an aluminum case, and the aluminum case has an ideal denseness, which can prevent external moisture from entering the case and prevent moisture from affecting the performance of the battery module.
电池组10包括若干相邻方式排列的电池单体12，电池单体12通过连接片142连接。电池组10的布置方式没有特别限制，可以为串联布置的电池组，也可以为并联布置的电池组。The battery pack 10 includes a plurality of battery cells 12 arranged in an adjacent manner, and the battery cells 12 are connected by a connecting piece 142. The arrangement of the battery pack 10 is not particularly limited, and may be a battery pack arranged in series or a battery pack arranged in parallel.
连接片142由导电材料制成，连接片142根据单体电池12的结构和形状两侧分别设有弯折部，两侧的弯折部分别与相邻两个单体电池12上的输出极120电连接，以使多个单体电池12实现串联和/或并联。The connecting piece 142 is made of a conductive material. The connecting piece 142 is respectively provided with a bent portion on both sides according to the structure and shape of the unit cell 12, and the bent portions on both sides and the output poles on the adjacent two single cells 12 respectively. 120 is electrically connected to enable a plurality of unit cells 12 to be connected in series and/or in parallel.
连接片142上设有电压采样端子144，固定在位于相邻两个单体电池12之间的隔热垫14上。隔热垫14的边缘延伸至单体电池12的边缘处，可以阻隔单体电池12之间的热量传递，如此设置，可以防止各单体电池12之间因热量而彼此影响，使得电池模组中的热量不容易超出极限值。A voltage sampling terminal 144 is disposed on the connecting piece 142 and is fixed on the heat insulating pad 14 between the adjacent two unit cells 12. The edge of the heat insulating pad 14 extends to the edge of the unit cell 12, and the heat transfer between the unit cells 12 can be blocked. The arrangement can prevent the cells 12 from affecting each other due to heat, so that the battery module The heat in it is not easy to exceed the limit.
每个单体电池12含有两个电极性相反的输出极120，输出极120位于单体电池12的顶部，由导电材料制成，分别与单体电池12上的极耳(未示出)和连接片142电连接。Each of the unit cells 12 includes two electrode electrodes 120 of opposite polarity, and the output electrode 120 is located at the top of the unit cell 12, and is made of a conductive material, respectively, with tabs (not shown) on the unit cell 12 and The connecting piece 142 is electrically connected.
根据本实用新型的一个实施方式，电池模组还包括两个转接片140，转接片 140由导电材料制成，两个转接片140分别位于电池组10两端的两个单体电池12的顶部，转接片140的一端与单体电池12上的极耳(未示出)电连接，另一端固定在隔热垫14上，防止转接片140移动。转接片140主要作为多个单体电池12中的总正输出极或总负输出极与顶盖30上的极柱360电连接，以将顶盖30对应的极柱360和单体电池12上对应的极耳(未示出)电连接。According to an embodiment of the present invention, the battery module further includes two adapter pieces 140, the adapter piece The 140 is made of a conductive material, and two adapter sheets 140 are respectively located at the top of the two unit cells 12 at both ends of the battery pack 10. One end of the adapter piece 140 is electrically connected to a tab (not shown) on the unit cell 12. The other end is fixed to the heat insulating pad 14 to prevent the transfer piece 140 from moving. The adapter piece 140 is mainly electrically connected to the poles 360 on the top cover 30 as the total positive output or the total negative output of the plurality of unit cells 12 to connect the poles 360 and the unit cells 12 corresponding to the top cover 30. The corresponding tabs (not shown) are electrically connected.
根据本实用新型的一个实施方式，每个单体电池12都使用封装膜124密封，封装膜124用来收容电解液和封装单体电池12的裸电芯(未示出)，并密封单体电池12的极耳(未示出)。封装膜124为塑料膜或耐电解液的绝缘材料膜，在图示实施方式中，封装膜124通过采用类似软包的工艺对电芯进行封装，形成电池结构。采用塑料膜或耐电解液的绝缘材料膜对电芯进行封装，电芯的厚度可远大于常规软包电芯的厚度，可以提高电池的容量。此外，电芯封装使用的塑料膜或耐电解液绝缘材料使用吹塑等工艺，随电芯外形吹塑出特定尺寸和外形的封膜，再采用类似软包的封边工艺进行封装和化成，解决了传统软包电芯密封不严和绝缘耐压不能满足要求的问题。According to an embodiment of the present invention, each of the unit cells 12 is sealed with an encapsulation film 124 for accommodating the electrolyte and the bare cells (not shown) of the package unit cells 12, and sealing the monomers. The tabs of the battery 12 (not shown). The encapsulation film 124 is a plastic film or an electrolyte-resistant insulating material film. In the illustrated embodiment, the encapsulation film 124 is packaged by a process similar to a soft package to form a battery structure. The battery is encapsulated by a plastic film or an electrolyte-resistant insulating material film. The thickness of the battery core can be much larger than that of a conventional soft-packed battery cell, and the battery capacity can be improved. In addition, the plastic film or the electrolyte-resistant insulating material used in the battery core package is blown by a process such as blow molding, and a sealing film of a specific size and shape is blown with the shape of the battery core, and then packaged and formed by a soft-packing edge-sealing process. The invention solves the problem that the traditional soft-package battery core is not tightly sealed and the insulation withstand voltage cannot meet the requirements.
通过采用塑料膜或耐电解液的绝缘材料，密封后形成的封边122可进行弯折，而且由于塑料膜优良的性质，即使密封后形成的封边122弯折，也能完全密封电芯，不会造成电池漏液，同时还可有效节约空间，提高电池模组的能量密度。By using a plastic film or an electrolyte-resistant insulating material, the sealing edge 122 formed after sealing can be bent, and due to the excellent properties of the plastic film, even if the sealing edge 122 formed after sealing is bent, the battery core can be completely sealed. It will not cause the battery to leak, and it can also save space and increase the energy density of the battery module.
顶盖30由金属材料制成，在图示实施方式中，顶盖30采用铝材制成，顶盖30设有防爆阀32和电压采样端子通孔34。The top cover 30 is made of a metal material. In the illustrated embodiment, the top cover 30 is made of aluminum, and the top cover 30 is provided with an explosion-proof valve 32 and a voltage sampling terminal through hole 34.
防爆阀32位于顶盖30的中部，当电池模组内部产气严重时，在高气压的作用下，顶盖30上的防爆阀32首先破开，通过防爆阀32达到泄压的作用，提高电池模组的安全性能。The explosion-proof valve 32 is located in the middle of the top cover 30. When the internal combustion of the battery module is serious, under the action of the high air pressure, the explosion-proof valve 32 on the top cover 30 is first broken, and the pressure relief function is achieved through the explosion-proof valve 32, thereby improving The safety performance of the battery module.
电压采样端子通孔34与连接片142上的电压采样端子144对应设置，电压 采样端子144贯穿电压采样端子通孔34，并至少部分延伸出电压采样端子通孔34，作为电压采样的端口，并通过绝缘橡胶圈和螺母密封固定。The voltage sampling terminal through hole 34 is corresponding to the voltage sampling terminal 144 on the connecting piece 142, and the voltage is The sampling terminal 144 extends through the voltage sampling terminal through hole 34 and at least partially extends out of the voltage sampling terminal through hole 34 as a port for voltage sampling, and is sealed and fixed by an insulating rubber ring and a nut.
根据本实用新型的一个优选实施方式，电池组10与电池壳体20之间的间隙填满具有合适导热系数和不与电解液发生反应的灌封胶，灌封胶将收容在电池壳体20内的电池组10和所有元件固定为一个整体，能够显著提高模组的抗振性能，即使电池模组在使用过程中发生振动，也不会导致元件的电连接断开而影响电池模组的正常运行。According to a preferred embodiment of the present invention, the gap between the battery pack 10 and the battery case 20 is filled with a potting compound having a suitable thermal conductivity and not reacting with the electrolyte, and the potting compound will be housed in the battery case 20 The internal battery pack 10 and all components are fixed as a whole, which can significantly improve the anti-vibration performance of the module. Even if the battery module vibrates during use, it will not cause the electrical connection of the component to be broken and affect the battery module. normal operation.
通过灌封胶填充，能够将电池组10中的单体电池12固定在固定位置，不仅可以防止单体电池12在电池壳体20内晃动，也能够防止因单体电池12与电池壳体20之间的摩擦而导致单体电池12的破坏。特别地，由于灌封胶的填充，能够将单体电池12的封装膜124的封边122进一步进行密封填充，即使封边122在弯折过程中发生密封不严的情况，也能通过灌封胶将封边122密封，防止单体电池12的电解液泄漏。By filling with the potting glue, the unit cells 12 in the battery pack 10 can be fixed in a fixed position, and not only the unit cells 12 can be prevented from shaking in the battery case 20, but also the unit cells 12 and the battery case 20 can be prevented. The friction between them causes destruction of the unit cell 12. In particular, due to the filling of the potting glue, the sealing edge 122 of the sealing film 124 of the unit cell 12 can be further sealed and filled, and even if the sealing edge 122 is not tightly sealed during the bending process, the sealing can be performed by potting. The glue seals the edge seal 122 to prevent electrolyte leakage of the unit cell 12.
此外，灌封胶能够填充模组内的间隙，使得单体电池12之间的传热更均匀，还可以起到导热散热、均衡温度的作用；由于填充的灌封胶具有防火阻燃的特性，即使在使用过程中个别单体电池12发生破坏或着火，也不会影响模组内其他单体电池12的正常运行。通过灌封胶填充，还能够提高内部元件之间的绝缘性能，改善电池模组的防水、防潮性能，减少电池模组因为长期使用因受潮生锈而导致破坏的情况。In addition, the potting compound can fill the gaps in the module, so that the heat transfer between the single cells 12 is more uniform, and can also function as heat conduction and heat dissipation, and the temperature is balanced; since the filled potting glue has the characteristics of fire retarding and flame retardancy. Even if the individual cells 12 are damaged or ignited during use, the normal operation of the other cells 12 in the module will not be affected. Filling with potting glue can also improve the insulation performance between the internal components, improve the waterproof and moisture-proof performance of the battery module, and reduce the damage of the battery module due to the rust and rust caused by long-term use.
以下结合图1至图5所示，详细描述本实用新型电池模组的组装过程：The assembly process of the battery module of the present invention is described in detail below with reference to FIGS. 1 to 5:
首先，请参阅图1至图4所示，将多个单体电池12并排布置形成电池组10，将电池组10收容于电池壳体20内，在电池组10两端的两个单体电池12顶部安装两块作为总正输出极或总负输出极的转接片140，并将转接片140与盖板30上的极柱360焊接连接实现电连接； First, referring to FIG. 1 to FIG. 4, a plurality of unit cells 12 are arranged side by side to form a battery pack 10, and the battery pack 10 is housed in the battery case 20, and two unit cells 12 at both ends of the battery pack 10 are provided. Two adapter plates 140 as total positive output or total negative output are mounted on the top, and the adapter piece 140 is soldered to the poles 360 on the cover plate 30 for electrical connection;
其次，往电池壳体20内注入导热系数高、不与电解液发生反应的灌封胶，通过灌封胶全部填充电池壳体20内部的间隙，将电池组10、转接片140、连接片142、隔热垫14、封边122全部密封固定在电池壳体20内，使电池模组成为一个整体；Next, a potting glue having a high thermal conductivity and not reacting with the electrolyte is injected into the battery case 20, and the gap inside the battery case 20 is completely filled by the potting glue, and the battery pack 10, the adapter piece 140, and the connecting piece are inserted. 142. The heat insulating pad 14 and the sealing edge 122 are all sealed and fixed in the battery case 20, so that the battery module becomes a whole;
最后，将顶盖30与电池壳体20焊接连接，使整个电池模组处于密封状态，其中，顶盖30上的电压采样端子通孔34与电压采样端子144密封固定连接，电压采样端子144作为外部电压采样的端口伸出顶盖30的外面。顶盖30上的极柱360通过极柱铆接铝块361密封固定连接，最后实现整个电池模组的密封固定，得到所需的具有高防护等级的电池模组。Finally, the top cover 30 is soldered to the battery case 20, so that the entire battery module is in a sealed state, wherein the voltage sampling terminal through hole 34 on the top cover 30 is sealingly and fixedly connected with the voltage sampling terminal 144, and the voltage sampling terminal 144 is used as a The port for external voltage sampling extends outside the top cover 30. The poles 360 on the top cover 30 are sealed and fixedly connected by the pole-studded aluminum block 361, and finally the entire battery module is sealed and fixed to obtain the required battery module with high protection level.
结合以上对本实用新型实施方式的详细描述可知，相对于现有技术，本实用新型电池模组通过塑料膜或耐电解液绝缘材料膜封装电芯，使用灌封胶将电池组密封固定在电池壳体内，具有以下优点：In combination with the above detailed description of the embodiments of the present invention, the battery module of the present invention is sealed with a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed to the battery case by using a potting glue. In vivo, has the following advantages:
1)固定电池组10位置，防止电池组10与电池壳体20摩擦，防止电池封装材料破裂；1) Fixing the position of the battery pack 10 to prevent the battery pack 10 from rubbing against the battery case 20 to prevent the battery package material from being broken;
2)电池极耳处的密封边可进行弯折，可以节省空间，提高电池模组的能量密度。2) The sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.
根据上述说明书的揭示和教导，本实用新型所属领域的技术人员还可以对上述实施方式进行适当的变更和修改。因此，本实用新型并不局限于上面揭示和描述的具体实施方式，对本实用新型的一些修改和变更也应当落入本实用新型的权利要求的保护范围内。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本实用新型构成任何限制。 The above embodiments may be modified and modified as appropriate by those skilled in the art in light of the above disclosure. Therefore, the present invention is not limited to the specific embodiments disclosed and described herein, and the modifications and variations of the present invention are intended to fall within the scope of the appended claims. In addition, although the specific terms are used in the specification, these terms are merely for convenience of description and do not constitute any limitation to the present invention.

Claims (10)

  1. 一种电池模组，包括：A battery module comprising:
    电池壳体；Battery housing
    电池组，收容于电池壳体中，电池组包括多个单体电池，单体电池设有极耳和与极耳电连接的输出极；以及The battery pack is housed in a battery case, the battery pack includes a plurality of single cells, and the single cells are provided with a tab and an output pole electrically connected to the tab;
    顶盖，与电池壳体密封连接；a top cover that is sealingly connected to the battery case;
    其特征在于，所述电池组与电池壳体之间的间隙填满灌封胶。It is characterized in that a gap between the battery pack and the battery case is filled with potting glue.
  2. 根据权利要求1所述的电池模组，其特征在于，所述单体电池包括封装膜，封装膜密封单体电池的极耳并形成封边。The battery module according to claim 1, wherein the unit cell comprises an encapsulating film that seals a tab of the unit cell and forms an edge seal.
  3. 根据权利要求2所述的电池模组，其特征在于，所述封装膜为塑料膜或耐电解液的绝缘材料膜。The battery module according to claim 2, wherein the encapsulating film is a plastic film or an electrolyte-resistant insulating material film.
  4. 根据权利要求2所述的电池模组，其特征在于，所述封装膜密封极耳后形成弯折封边。The battery module according to claim 2, wherein the encapsulating film forms a bent edge after sealing the tab.
  5. 根据权利要求1所述的电池模组，其特征在于，所述顶盖上设有防爆阀和电压采样端子通孔。The battery module according to claim 1, wherein the top cover is provided with an explosion-proof valve and a voltage sampling terminal through hole.
  6. 根据权利要求5所述的电池模组，其特征在于，所述电压采样端子通孔与连接片上设置的电压采样端子对应，顶盖与电池壳体密封连接时，电压采样端子贯穿密封安装于电压采样端子通孔中并至少部分延伸出电压采样端子通孔。The battery module according to claim 5, wherein the voltage sampling terminal through hole corresponds to a voltage sampling terminal disposed on the connecting piece, and when the top cover is sealedly connected to the battery case, the voltage sampling terminal is sealed and mounted on the voltage The voltage sampling terminal through hole is at least partially extended in the sampling terminal through hole.
  7. 根据权利要求1所述的电池模组，其特征在于，所述电池壳体和顶盖由金属材料制成，电池壳体和顶盖通过焊接密封连接。The battery module according to claim 1, wherein the battery case and the top cover are made of a metal material, and the battery case and the top cover are connected by welding.
  8. 根据权利要求7所述的电池模组，其特征在于，所述电池壳体和顶盖由铝材制成。The battery module according to claim 7, wherein said battery case and said top cover are made of aluminum.
  9. 根据权利要求1至8中任一项所述的电池模组，其特征在于，所述电池 模组还包括：The battery module according to any one of claims 1 to 8, wherein the battery The module also includes:
    隔热垫，位于相邻的单体电池之间；Insulation pad, located between adjacent cells;
    转接片，由导电材料制成，作为多个单体电池中的总正输出极或总负输出极与顶盖上设置的极柱电连接；以及The adapter piece is made of a conductive material and is electrically connected to the poles disposed on the top cover as a total positive output or a total negative output of the plurality of single cells;
    多个带有电压采样端子的导电连接片，各连接片与相应的单体电池的输出极电连接，以使多个单体电池实现串联和/或并联。A plurality of conductive connecting pieces with voltage sampling terminals, each connecting piece is electrically connected to an output of the corresponding single cell, so that the plurality of single cells are connected in series and/or in parallel.
  10. 根据权利要求9所述的电池模组，其特征在于，所述转接片为两个，分别位于电池组两端两个单体电池的顶部，一端与单体电池上的极耳电连接，另一端固定在隔热垫上。 The battery module according to claim 9, wherein the two adapter pieces are respectively located at the top of two single cells at two ends of the battery pack, and one end is electrically connected to the tabs on the single cell. The other end is fixed to the insulation mat.
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