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WO2018072421A1 - 一种拼装式动力电池系统结构 - Google Patents

一种拼装式动力电池系统结构 Download PDF

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Publication number
WO2018072421A1
WO2018072421A1 PCT/CN2017/081543 CN2017081543W WO2018072421A1 WO 2018072421 A1 WO2018072421 A1 WO 2018072421A1 CN 2017081543 W CN2017081543 W CN 2017081543W WO 2018072421 A1 WO2018072421 A1 WO 2018072421A1
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WO
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Prior art keywords
plate
battery system
power battery
battery
cover plate
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PCT/CN2017/081543
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English (en)
French (fr)
Inventor
顾亮亮
林栋�
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沃太能源南通有限公司
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Publication of WO2018072421A1 publication Critical patent/WO2018072421A1/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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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 invention relates to a power battery system structure, in particular to a structure of a assembled power battery system.
  • the capacity and performance of the battery pack directly affects the operating time and service life of the system.
  • the design of the battery pack it is necessary to consider the suitability of volume and size.
  • the existing power battery system generally adopts a battery system casing, a battery pack, a management system, a wire harness and the like.
  • the structure of the battery pack is mostly fixed by the upper and lower brackets, and there is a gap of 2-4 mm between the battery core and the battery core, thereby causing waste of space arrangement.
  • the present invention provides a structure of a assembled power battery system.
  • the assembled structure makes the battery system compact in structure, high in space utilization, high in safety performance, and increased in battery capacity under the same volume.
  • the present invention discloses a fabricated power battery system structure including a housing and a power battery system mounted in the housing, wherein:
  • the outer casing comprises a box body, a front cover plate and a top cover plate, wherein the box body is integrally formed by welding the bottom plate, the rear cover plate and the two side plates, and the top cover plate and the front cover plate are assembled and fixed with the box body;
  • the power battery system includes two battery modules, a battery frame, two left brackets, two right brackets, a sealing plate and a BMS bracket.
  • the battery frame has an intermediate partition plate and is disposed on both sides of the intermediate partition plate.
  • the first back board and the second back board are respectively installed on two sides of the middle partition board, and the lower edge of the sealing board has a bent second limit strip, which is stuck at the front end of the battery module and passes through the second
  • the limit bar is positioned up and down, and the two left brackets are respectively wrapped on the upper and lower edge corners of the battery module, and the two ends are respectively fastened with the sealing plate and the second back plate, and the two right brackets are respectively wrapped in the other group.
  • the two ends are respectively fastened with the sealing plate and the first back plate, and the BMS bracket is installed at the front end of the sealing plate.
  • the upper edge of the side panel and the rear cover are bent inwardly with a fastening strip, and the fastening strip is provided with a plurality of fastening holes, and the side panel is embedded with a groove type handle, the rear cover Multiple sockets are mounted on the top.
  • the upper edge and the lower edge of the intermediate partition plate both extend to the two sides, and the third back limit strip is bent at the edge of the first back plate and the second back plate, and the two battery modules are installed.
  • the upper and lower limits are realized by the limit strip and the third limit strip on both sides of the intermediate partition plate.
  • An epoxy resin sheet is further disposed between the sealing plate and the battery module.
  • a mounting hole plate is arranged at four corners of the sealing plate, and one ends of the left bracket and the right bracket are fastened with the mounting hole plate.
  • the left bracket and the right bracket have the same structure and are all groove structures, and the groove bottom of the groove is provided with a plurality of wire holes and nut holes, and the two short sides of the groove are provided with mounting holes, and a long side is turned outward. Folded by 90°, the other long side is provided with a plurality of second mounting holes, and the 90° flange is matched with the edge angle of the battery module.
  • the structure of the battery system disclosed by the invention has the specification of 48V100AH, and we adopt 3.2V50AH battery core to carry out 2P15S (2 parallel 15 series connection); the overall structure cancels the traditional design of the battery pack, and adopts the idea of directly fixing the battery.
  • the size of the 19-inch standard cabinet is placed (width 482.6mm, GBT 3047.3-2003), and the depth is 600mm.
  • the structure of the assembled power battery system of the present invention has the following advantages: the assembled structure makes the battery system compact in structure, high in space utilization, high in safety performance, and battery capacity in the same volume. Increase.
  • the overall structure eliminates the design of the battery pack, and instead directly fixes the battery core, and its volumetric specific density reaches 120 wh/l or more.
  • Figure 1 is an exploded view of the structure of the present invention
  • Figure 2 is an assembled view of the power battery system of the present invention.
  • Figure 3 is a schematic view showing the structure of the casing of the present invention.
  • Figure 4 is a schematic structural view of a battery frame of the present invention.
  • Figure 5 is a schematic structural view of a sealing plate of the present invention.
  • Figure 6 is a schematic structural view of a left bracket (right bracket) of the present invention.
  • Fig. 7 is a schematic view showing another structure of the left bracket (right bracket) of the present invention.
  • FIG. 1 to 2 show a structure of a modular power battery system according to the present invention, comprising a housing and a power battery system mounted in the housing.
  • the outer casing includes a casing 1, a front cover 2 and a top cover 3, wherein the casing 1 is integrally formed by welding the bottom plate 11, the rear cover 12 and the two side plates 13.
  • the upper edge of the side plate 13 and the rear cover 12 are bent inwardly with a fastening strip 14 , and the fastening strip 14 is provided with a plurality of fastening holes, and the side plate 13 is embedded with a groove type handle 15
  • the front cover plate and the two side plates are fixed and fixed.
  • the top cover plate 3 is fixed on the fastening strip 14 by a fastener, and the rear cover plate is provided with a plurality of connecting slots 16 embedded therein. Wiring
  • the trough 16 is treated with a stepped surface structure to allow room for the rear power line to prevent interference with the rear of the cabinet.
  • the power battery system includes two sets of battery modules 4, a battery frame 5, two sets of left brackets 6, two sets of right brackets 7, a sealing plate 8 and a BMS bracket 9, wherein:
  • the battery module 4 is composed of a plurality of cell cores, and the cell module is a group of 3.2V50AH cells, and the cells are connected by a bus bar.
  • the cells on both sides are respectively 2P7S (2 Parallel 7 series), 2P8S (2 parallel 8 series), an insulating double-sided tape is fixed between the battery core and the battery core, and an epoxy insulating sheet is arranged between the battery module and the top cover 3 and the bottom plate 11
  • the pc insulating sheet 40 is physically insulated.
  • the battery frame 5 has an intermediate partitioning plate 51, and the end portion on the side of the intermediate partitioning plate 51 is vertically welded with the first backing plate 52, thereby forming a first battery module area on the side and the other side.
  • a second backing plate 53 is vertically welded to form a second battery module region on the side, and the upper and lower edges of the intermediate partitioning plate 51 extend to the both sides to extend the strips 54, the first backing plate 52 And a third limiting strip 55 extending toward the battery module area at the edge of the second backing plate 53.
  • the two battery modules 4 are respectively installed in the first battery module area and the second battery module area, and are realized by the limiting strip.
  • the partition plate 51 is covered on both sides with a layer of epoxy resin plate 56, and a cover plate 57 is disposed at the rear end of the first back plate 52 to protect the output wire of the battery module, and the battery frame and the rear
  • the cover plate plays a supporting role to prevent it from shaking.
  • the rear end of the second back plate 53 is provided with a total positive total negative output cover plate 58 to prevent the copper wire of the battery core from being exposed, thereby protecting the device.
  • the sealing plate 8 is disposed at the front of the battery module, and an epoxy resin plate 10 is further disposed between the battery module, and the upper and lower edges of the sealing plate 8 are vertically bent with a second limiting strip 81.
  • the upper and lower positions are realized by the second limiting strip, and the mounting hole plate 82 is mounted on the four corners of the sealing plate 8.
  • the left bracket 6 is a groove 61 structure, and the groove bottom of the groove 61 is provided with a plurality of wire holes 62 and a nut hole 63 for engaging the wire hole 62.
  • the two short sides of the groove 61 are provided with mounting holes 64, one long side is folded outward with a 90° flange 65, and the other long side is provided with a plurality of second mounting holes 66,
  • the left bracket 6 is two, one is located at the upper edge of the battery module, and the other is located at the lower edge of the battery module, and the 90° flange structure cooperates with the upper edge corner and the lower edge corner of the battery module, and the groove 61 It is located outside the battery module, so that when the battery module is installed in the box body, there is a certain gap between the side plate and the side plate of the box body, which not only realizes the wiring but also increases the heat dissipation space, and the mounting hole 64 and the sealing plate at one end of the
  • the right bracket structure is identical to the left bracket (not described here) and is mounted on the upper and lower sides of the other battery module.
  • the BMS bracket 9 is mounted on the closure panel 8 by fasteners.
  • the assembled power battery system structure disclosed by the present invention is assembled by fastening one end of two left brackets to the second back panel of the battery frame by screws, and one end of the two right brackets and the battery frame
  • the first backboard is fixed by screws, and two sets of battery modules are installed in two battery module zones.
  • the battery module is covered by a cover, an insulating board is coated on the front end of the battery module, and then the sealing plate is loaded and fastened.
  • the piece is fastened to the left and right brackets, and finally the BMS bracket is attached to form a power battery system as a whole.
  • the whole power battery system is placed in the box body 1, and the rear cover plate is fixed to the first back plate and the second back plate of the battery frame by screws, and the left bracket and the right bracket and the side plate are fixed, because the left bracket and the right bracket are fixed.
  • the existence of the battery module not only fixes the battery module, but also causes a certain gap between the battery module and the side panel of the cabinet, which increases the heat dissipation during operation of the battery module, and the battery module and the wiring slot are connected by wires, and the existence of the gap is convenient. The wires pass through without damaging the wires.
  • the top cover and the front cover are installed.
  • the structure of the assembled power battery system disclosed by the invention is assembled in the form of components other than the battery module.
  • the distribution of the internal battery module can be reasonably optimized without lowering the battery.
  • the internal structure is compact, the space utilization is improved, and the battery capacity is increased.

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

Abstract

本发明公开了一种拼装式动力电池系统结构，包括外壳以及安装在外壳内的动力电池系统，其中：所述外壳包括箱体，前盖板及顶盖板，其中箱体由底板，后盖板及两个侧板折弯焊接一体成型，所述顶盖板及前盖板与箱体拼装固定；所述动力电池系统由两组电池模块，电池框架，两根左支架，两根右支架，封板及BMS支架等组成，其中箱体，前盖板，顶盖板，电池框架，左支架，右支架，封板及BMS支架之间均为拼接式连接。

Description

一种拼装式动力电池系统结构 技术领域
本发明涉及动力电池系统结构，尤其涉及一种拼装式动力电池系统结构。
背景技术
近年来，随着我国电力体制改革不断深化和能源互联网兴起，国家开始大力发展新能源光伏；各种储能类产品应运而生，储能电站用于电力系统的集中调度、大中型储能系统用于智能电网的调峰调频、小型储能系统用于工商业、家庭的日常使用；尤其是容量在数KWh的小型储能系统正面临着大规模的需求；
作为小型储能系统中的核心部件，电池组的容量和性能直接影响到系统的工作时间和使用寿命。对于电池组的设计更需要考虑体积、尺寸的适宜性。
现有的动力电池系统中一般采用由电池系统外壳、电池包、管理系统、线束等部分组成。其中电池包的结构多采用上下支架固定的形式，而且电芯与电芯之间有2-4mm的间隙，从而造成空间排布上的浪费。
发明内容
为克服现有技术的缺陷，本发明提供了一种拼装式动力电池系统结构，采用拼装式结构使得电池系统结构紧凑，空间利用率高，安全性能高，在同等体积下电池容量增大。
本发明揭示了一种拼装式动力电池系统结构，包括外壳以及安装在外壳内的动力电池系统，其中：
所述外壳包括箱体，前盖板及顶盖板，其中箱体由底板，后盖板及两个侧板焊接一体成型，所述顶盖板及前盖板与箱体拼装固定；
所述动力电池系统包括两组电池模块，电池框架，两根左支架，两根右支架，封板及BMS支架，所述电池框架具有中间分隔板以及设于中间分隔板两侧 的第一背板和第二背板，两组电池模块分别安装在中间分隔板两侧，所述封板上下边缘具有折弯的第二限位条，卡在电池模块前端，通过第二限位条上下定位，两根左支架分别包覆在电池模块的上下两个边缘角上，且两端分别与封板及第二背板紧固，两根右支架分别包覆在另一组电池模块的上下两个边缘角上，两端分别与封板及第一背板紧固，所述BMS支架安装在封板前端。
所述侧板及后盖板上边缘向内折弯有紧固条，所述紧固条上设有复数紧固孔，所述侧板上嵌有凹槽型提手，所述后盖板上嵌装有多个接线槽。
所述中间分隔板的上边缘和下边缘均向两侧延伸有限位条，所述第一背板和第二背板的边缘处均折弯有第三限位条，两组电池模块安装在中间分隔板两侧通过限位条及第三限位条实现上下限位。
所述封板与电池模块之间还设有环氧树脂片。
所述封板四个角上设有安装孔板，左支架及右支架一端与安装孔板紧固。
所述左支架及右支架结构相同，均为凹槽结构，且凹槽的槽底设有复数过线孔及螺母孔，凹槽的两个短边设有安装孔，一个长边向外翻折有90°的翻边，另一个长边上设有复数第二安装孔，90°的翻边与电池模块的边缘角相配合。
本发明所揭示的电池系统结构，其系统的规格为48V100AH，我们采用3.2V50AH电芯，进行2P15S(2并联15串联)组成；整体结构取消电池包的传统设计，采用直接将电池进行固定的思路来减小内部空间，电池与支架(5、6、7、8)配合处均有绝缘片用与于物理绝缘，保证电池与钣金之间不会造成导电，另外电池与电池之间排布没有间距，而通过一层双面胶进行隔离，也能防止电池与电池发生相对位移；整体的尺寸满足插箱高度为4U的尺寸放置(1U＝44.45mm,符合GBT 3047.2-2003)，宽度符合19寸标准机柜的尺寸放置(宽度482.6mm，GBT 3047.3-2003)，深度符合600mm的机柜的尺寸放置。
与现有技术相比，本发明的一种拼装式动力电池系统结构，具有如下有益之处：采用拼装式结构使得电池系统结构紧凑，空间利用率高，安全性能高，在同等体积下电池容量增大。整体结构取消电池包的设计，改为直接固定电芯，其体积比密度达到了120wh/l以上。
附图说明
图1是本发明结构的爆炸图；
图2是本发明动力电池系统组装图；
图3是本发明箱体的结构示意图；
图4是本发明电池框架的结构示意图；
图5是本发明封板的结构示意图；
图6是本发明左支架(右支架)的结构示意图；
图7是本发明左支架(右支架)的另一结构示意图。
具体实施方式
下面将结合本发明的附图，对本发明实施例的技术方案进行清楚、完整的描述。
如图1～2所示为本发明所揭示的一种拼装式动力电池系统结构，包括外壳以及安装在外壳内的动力电池系统。
具体说来，如图3所示，所述外壳包括箱体1，前盖板2及顶盖板3，其中箱体1由底板11，后盖板12及两个侧板13焊接一体成型，所述侧板13及后盖板12上边缘向内折弯有紧固条14，所述紧固条14上设有复数紧固孔，所述侧板13上嵌有凹槽型提手15，所述前盖板与两侧板卡和固定，所述顶盖板3通过紧固件固定在紧固条14上，所述后盖板上设有嵌装有多个接线槽16，所述接线 槽16采用台阶面结构处理，用于留出空间给后部动力线，以此防止与机柜后部干涉。
所述动力电池系统包括两组电池模块4，电池框架5，两组左支架6，两组右支架7，封板8及BMS支架9，其中：
所述电池模块4由复数单体电芯组成电芯模块，电芯模块采用的是3.2V50AH电芯进行成组，电芯通过汇流排进行串并联接，两边电芯成组分别为2P7S(2并联7串联)、2P8S(2并联8串联)，电芯与电芯之间有一层绝缘双面胶固定，所述电芯模块与顶盖板3及底板11之间设有环氧绝缘片及pc绝缘片40进行物理绝缘。
如图4所示电池框架5具有中间分隔板51，所述中间分隔板51一侧的端部垂直焊接有第一背板52，从而在该侧形成第一电池模块区，另一侧垂直焊接有第二背板53，从而在该侧形成第二电池模块区，所述中间分隔板51的上边缘和下边缘均向两侧延伸有限位条54，所述第一背板52和第二背板53的边缘处向电池模块区内延伸有第三限位条55，两组电池模块4分别安装在第一电池模块区和第二电池模块区内，通过限位条实现上下限位，所述分隔板51两侧覆有一层环氧树脂板56，所述第一背板52后端的设有盖板57，可以保护电芯模块的输出电线，同时对电池框架以及后盖板起到支撑作用，防止其晃动，所述第二背板53后端设有总正总负输出盖板58，防止电芯的铜排线不外露，进而保护设备。
如图5所示所述封板8设于电池模块前部，与电池模块之间还设有环氧树脂板10，所述封板8的上下边缘垂直折弯有第二限位条81，当覆在电池模块前端是，通过第二限位条实现上下定位，同时所述封板8四个角上样设有安装孔板82。
如图6～7所示，所述左支架6为凹槽61结构，且凹槽61的槽底设有复数过线孔62及螺母孔63，所述螺母孔用于配合过线孔62进行线束的固定，所述凹槽61两个短边设有安装孔64，一个长边向外翻折有90°的翻边65，另一个长边上设有复数第二安装孔66，所述左支架6为两根，一根位于电池模块的上边缘，另一根位于电池模块的下边缘，其90°的翻边结构与电池模块上边缘角及下边缘角相配合，且凹槽61位于电池模块外部，使得电池模块安装到箱体内时，与箱体侧板之间具有一定空隙，既实现了走线，又增加了散热空间，所述凹槽61一端的安装孔64与封板8上安装孔板82紧固，另一端的安装孔与第二背板53固定，同时凹槽61与箱体1侧板通过第二安装孔紧固。
所述右支架结构与左支架一致(在此不过多描述)，安装在另一组电池模块的上下侧边。
所述BMS支架9通过紧固件安装在封板8上。
本发明所揭示的一种拼装式动力电池系统结构，其组装方法为：将两根左支架的一端与电池框架的第二背板通过螺钉紧固，将两根右支架的一端与电池框架的第一背板通过螺钉固定，将两组电池模块装入两个电池模块区内，此时电池模块被包覆定位，在电池模块前端覆一层绝缘板，然后装入封板，通过紧固件将封板与左支架及右支架紧固，最后装上BMS支架就形成一个动力电池系统整体。
将动力电池系统整体放入箱体1内，通过螺钉将后盖板与电池框架的第一背板及第二背板固定，将左支架与右支架与侧板固定，由于左支架与右支架的存在，不仅固定了电池模块，而且使得电池模块与箱体侧板之间存在一定空隙，增加了电池模块工作时的散热，同时电池模块与接线槽之间通过电线连接，空隙的存在方便了电线的穿过，且不损伤电线。
动力电池系统与箱体固定后，安装顶盖及前盖板及可。
本发明揭示的一种拼装式动力电池系统结构，其除了电池模块以外的部件之间，均是采用拼装的形式，在箱体尺寸限制下，可以合理优化内部电池模块的分布，在不降低电池系统性能的前提下，保证了内部结构紧凑，提高空间利用率，增大了电池容量。
本发明的技术内容及技术特征已揭示如上，然而熟悉本领域的技术人员仍可能基于本发明的揭示而作种种不背离本发明精神的替换及修饰，因此，本发明保护范围应不限于实施例所揭示的内容，而应包括各种不背离本发明的替换及修饰，并为本专利申请权利要求所涵盖。

Claims (6)

  1. 一种拼装式动力电池系统结构，其特征在于：包括外壳以及安装在外壳内的动力电池系统，其中：
    所述外壳包括箱体，前盖板及顶盖板，其中箱体由底板，后盖板及两个侧板焊接一体成型，所述顶盖板及前盖板与箱体拼装固定；
    所述动力电池系统包括两组电池模块，电池框架，两根左支架，两根右支架，封板及BMS支架，所述电池框架具有中间分隔板以及设于中间分隔板两侧的第一背板和第二背板，两组电池模块分别安装在中间分隔板两侧，所述封板上下边缘具有折弯的第二限位条，卡在电池模块前端，通过第二限位条上下定位，两根左支架分别包覆在电池模块的上下两个边缘角上，且两端分别与封板及第一背板紧固，两根右支架分别包覆在另一组电池模块的上下两个边缘角上，两端分别与封板及第一背板紧固，所述BMS支架安装在封板前端。
  2. 根据权利要求1所述的一种拼装式动力电池系统结构，其特征在于：所述箱体侧板及后盖板上边缘向内折弯有紧固条，所述紧固条上设有复数紧固孔，所述侧板上嵌有凹槽型提手，所述后盖板上嵌装有多个接线槽。
  3. 根据权利要求1所述的一种拼装式动力电池系统结构，其特征在于：所述中间分隔板的上边缘和下边缘均向两侧延伸有限位条，所述第一背板和第二背板的边缘处均折弯有第三限位条，两组电池模块安装在中间分隔板两侧通过限位条及第三限位条实现上下限位。
  4. 根据权利要求1所述的一种拼装式动力电池系统结构，其特征在于：所述封板与电池模块之间还设有绝缘片。
  5. 根据权利要求1所述的一种拼装式动力电池系统结构，其特征在于：所述封板四个角上设有安装孔板，左支架及右支架一端与安装孔板紧固。
  6. 根据权利要求1所述的一种拼装式动力电池系统结构，其特征在于：所述左支架及右支架结构相同，均为凹槽结构，且凹槽的槽底设有复数过线孔及螺母 孔，凹槽的两个短边设有安装孔，一个长边向外翻折有90°的翻边，另一个长边上设有复数第二安装孔，90°的翻边与电池模块的边缘角相配合。
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