WO2020098764A1 - 电池监控单元、电池监控单元的制造方法及电池包 - Google Patents

电池监控单元、电池监控单元的制造方法及电池包 Download PDF

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Publication number
WO2020098764A1
WO2020098764A1 PCT/CN2019/118666 CN2019118666W WO2020098764A1 WO 2020098764 A1 WO2020098764 A1 WO 2020098764A1 CN 2019118666 W CN2019118666 W CN 2019118666W WO 2020098764 A1 WO2020098764 A1 WO 2020098764A1
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WO
WIPO (PCT)
Prior art keywords
monitoring unit
battery monitoring
metal plate
elastic portion
circuit board
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PCT/CN2019/118666
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English (en)
French (fr)
Inventor
阮生甡
王鹏
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2020098764A1 publication Critical patent/WO2020098764A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H01M50/287—Fixing of circuit boards to lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/667—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an electronic component, e.g. a CPU, an inverter or a capacitor
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of power batteries, in particular to a battery monitoring unit, a method for manufacturing a battery monitoring unit, and a battery pack.
  • the battery monitoring unit (Cell Supervision Circuit, CSC for short) is the control system of the power battery. Some of the heating elements in the CSC generate a lot of heat, which will cause heat concentration after continuous operation. If the temperature is high for a long time, its performance will decline and affect the power The safety of the battery.
  • CSC generally transfers heat to the external fixing plate through the heat sink.
  • the heat sink and the external fixing plate are large-area metal plate parts. Due to the limited processing accuracy of parts and components, the flatness of the heat sink and the external fixing plate deviate There is a gap in the heat dissipation interface after rigid connection, which leads to the problem of unstable thermal resistance when heat is transferred between the heat dissipation interfaces, which affects the heat dissipation effect of CSC.
  • the purpose of the present application is to provide a battery monitoring unit, a method for manufacturing the battery monitoring unit, and a battery pack.
  • the battery monitoring unit is beneficial to improve the problem of unstable thermal resistance during heat dissipation.
  • the present application provides a battery monitoring unit, the battery monitoring unit includes: a circuit board; a heat sink, including a metal plate for heat dissipation, the metal plate is disposed near the circuit board; a fixed plate, connected to the heat sink, the fixed plate It includes a body portion and an elastic portion formed on the body portion. The elastic portion is used to fill the gap between the metal plate and the fixed plate.
  • the present application also provides a battery pack including any battery monitoring unit as described above.
  • the present application also provides a manufacturing method of the battery monitoring unit as described above, the manufacturing method includes: connecting the heat dissipation member to the fixing plate, so that the elastic portion of the fixing board abuts against the metal of the heat dissipation member Board; connect the heat sink to the circuit board; close the cover to the circuit board and connect.
  • This application provides a battery monitoring unit and a method for manufacturing the same.
  • the elastic portion By forming an elastic portion on a fixed plate connected to a heat dissipation element, the elastic portion is in close contact with a metal plate for heat dissipation on the heat dissipation element to fill the metal plate
  • the gap with the fixed plate improves the problem of unstable thermal resistance during heat dissipation and improves the heat dissipation effect of the battery monitoring unit.
  • the battery pack provided by the present application adopts the battery monitoring unit as described above, which improves the safety and reliability of the battery pack.
  • FIG. 1 is a schematic structural diagram of a battery monitoring unit provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural view of a fixing plate of the battery monitoring unit shown in FIG. 1;
  • FIG. 3 is a schematic structural view of another fixing plate of the battery monitoring unit shown in FIG. 1;
  • FIG. 4 is a schematic view of the assembly effect of the fixing plate and the heat sink in the battery monitoring unit shown in FIG. 1;
  • FIG. 5 is an exploded schematic view of the fixing plate and the heat sink in the battery monitoring unit shown in FIG. 4.
  • an embodiment of the present application provides a battery monitoring unit, including: a circuit board 1, a heat sink 2 and a fixed board 3.
  • the circuit board 1 is provided with electronic components 11, and the electronic components 11 self-heat due to the passage of current during operation.
  • the heat sink 2 includes a metal plate 21, the metal plate 21 is disposed near the circuit board 1, and the heat sink 2 radiates heat through the metal plate 21.
  • the fixing plate 3 is connected to the heat sink 2.
  • the fixing plate 3 includes a body portion 31 and an elastic portion 32 formed on the body portion 31. The elastic portion 32 is used to fill the gap between the metal plate 21 and the fixing plate 3. That is, when the fixing plate 3 is connected to the heat sink 2, the elastic portion 32 abuts against the metal plate 21.
  • the circuit board 1, the heat dissipation member 2, and the fixing board 3 are stacked in this order.
  • the heat generated by the heat generated by the electronic components 11 on the circuit board 1 will be transferred to the metal plate 21 for heat dissipation of the heat sink 2 below. Since the elastic portion 32 of the fixing plate 3 abuts against the metal plate 21 of the heat sink 2, the metal plate 21 and the fixing plate 3 are in close contact, avoiding heat caused by the gap between the metal plate 21 and the fixing plate 3 during heat dissipation Instability problem.
  • an elastic portion 32 is formed on the fixing plate 3 connected to the heat dissipation element 2 and the elastic portion 32 is brought into close contact with the metal plate 21 on the heat dissipation element 2 for heat dissipation to fill
  • the gap between the metal plate 21 and the fixed plate 3 improves the problem of unstable thermal resistance during heat dissipation and improves the heat dissipation effect of the CSC.
  • the body portion 31 of the fixing plate 3 has opposing first and second surfaces a and b, the first surface a is disposed near the metal plate 21, and the elastic portion 32 extends from the body portion 31 along the second surface b to the first surface
  • the direction of a is recessed.
  • the fixing plate 3 is connected to the heat sink 2, and the elastic portion 32 is recessed toward the metal plate 21.
  • the elastic portion 32 can be compressed due to its own elasticity, so that the metal plate 21 and the elastic portion 32 are in close contact, and the metal plate 21 and The gap between the fixing plates 3 forms a stable heat dissipation interface therebetween, which improves the problem of unstable thermal resistance caused by the machining flatness error of the metal plate 21 and the elastic portion 32 itself.
  • the elastic portion 32 has cutouts 33 on both sides.
  • the cutout 33 penetrates the body portion 31.
  • the cutout 33 can release the stress between the elastic portion 32 and the body portion 31 and improve the elastic deformation ability of the elastic portion 32.
  • the elastic portion 32 is stamped and formed by the body portion 31, and its wall thickness, forming height, and compression deformation amount are designed and verified according to specific applications.
  • the elastic portion 32 includes two connecting pieces 321 arranged at intervals. One end of the connecting piece 321 is suspended with respect to the body portion 31 to further improve the elastic deformation ability of the elastic portion 32.
  • the elastic portion 32 is provided with a groove 322 formed by the elastic portion 32 recessed in the direction of the first surface a to the second surface b.
  • the elastic portion 32 can absorb the elastic deformation energy of the elastic portion by providing a groove 322 opposite to the direction of its own depression, thereby improving the rigidity and strength of the elastic portion 32.
  • the structural strength of the elastic portion 32 can be improved, and the heat dissipation contact area between the elastic portion 32 and the metal plate 21 can be increased.
  • the number of the elastic portions 32 may be one or more than two. When the length dimension of the fixing plate 3 is small, only one elastic portion 32 may be formed on the body portion 31. When the length dimension of the fixing plate 3 is large, the elastic portion 32 may be Two or more elastic portions 32 are formed at intervals on the portion 31.
  • the elastic portion 32 is stamped and formed by the body portion 31, it is difficult to ensure the durability of the elastic portion 32 solely by its elasticity.
  • the metal plate 21 and the elastic portion 32 are fixedly connected.
  • the metal plate 21 may be provided with a fastener 211, such as a rivet, and the elastic portion 32 is provided with a corresponding mounting hole 323, as shown in FIGS. It is fixedly connected with the elastic portion 32.
  • the metal plate 21 and the elastic portion 32 may be fixedly connected by welding.
  • the heat sink 2 further includes a liner 22 supporting the metal plate 21, the liner 22 is provided with a step groove 221, and the metal plate 21 is embedded in the step groove 221 And contact with the elastic portion 32.
  • the liner 22 may be a non-metallic part such as a plastic part, and the metal plate 21 may be integrally injection molded with the liner 22 by insert injection molding, or may be separately manufactured and the two may be directly assembled.
  • two or more ribs 222 may be arranged in the step groove 221 at intervals, and the ribs 222 are used to support the metal plate 21.
  • the rib 222 may be disposed corresponding to the interval between two adjacent elastic portions 32, so as not to affect the fixed connection between the metal plate 21 and the elastic portion 32.
  • a thermal pad 4 is also provided between the circuit board 1 and the metal plate 21 of the heat sink 2.
  • the thermal pad 4 is made of an elastic material, such as but not limited to a silicone plate.
  • the thermal pad 4 can fill the gap between the circuit board 1 and the metal plate 21; The heat generated by 21 is quickly transferred to the metal plate 21, which improves the heat conduction efficiency.
  • the heat sink 2 is connected to the circuit board 1 and the fixing plate 3 via the backing plate 22, respectively.
  • the liner 22 is provided with a double-headed positioning post 223.
  • the double-headed positioning post 223 includes a male end and a female end that are coaxially arranged.
  • the male end has an external thread and is disposed toward the fixed plate 2.
  • the female end has an internal thread and Set toward the circuit board 1, the circuit board 1 is fixed to the liner board 22 by the cooperation of the screw and the female end, and the fixing plate 2 is fixed to the liner board 22 by the cooperation of the nut and the male end.
  • the battery monitoring unit further includes a housing 5 which is connected to the circuit board 1 to prevent impurities such as dust from falling onto the circuit board 1.
  • the embodiments of the present application also provide a method for manufacturing the battery monitoring unit as described above.
  • the manufacturing method includes:
  • Step S1 connect the heat sink 2 to the fixing plate 3, so that the elastic portion 32 of the fixing plate 3 abuts against the metal plate 21 of the heat sink 2;
  • Step S2 Connect the heat sink 2 to the circuit board 1;
  • Step S3 Cover and connect the housing 5 to the circuit board 1.
  • a method for manufacturing a battery monitoring unit provided by an embodiment of the present application is that an elastic portion 32 is formed on a fixing plate 3 connected to a heat dissipation member 2 and the elastic portion 32 is pressed against a metal used for heat dissipation on the heat dissipation member 2
  • the plate 21 fills the gap between the metal plate 21 and the fixed plate 3, which improves the problem of unstable thermal resistance during heat dissipation and improves the heat dissipation effect of the battery monitoring unit.
  • the embodiments of the present application also provide a battery pack, including any battery monitoring unit as described above, which solves the heat dissipation problem of local heat generation of the circuit board 1 and improves the safety and reliability of the battery pack.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

一种电池监控单元、电池监控单元的制造方法及电池包。该电池监控单元包括：电路板（1）；散热件（2），包括用于散热的金属板（21），金属板（21）靠近电路板（1）设置；固定板（3），与散热件（2）连接，固定板（3）包括本体部（31）和形成于本体部（31）上的弹性部（32），弹性部（32）用于填充金属板（21）与固定板（3）之间的间隙。电池监控单元，通过在与散热件（2）连接的固定板（3）上形成有弹性部（32），并使弹性部（32）与散热件（2）上用于散热的金属板（21）紧密接触，以填充金属板（21）与固定板（3）之间的间隙，改善了散热过程中产生的热阻不稳定问题，提高了电池监控单元的散热效果。

Description

电池监控单元、电池监控单元的制造方法及电池包
相关申请的交叉引用
本申请要求享有于2018年11月15日提交的名称为“电池监控单元及电池包”的中国专利申请201821895875.2的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及动力电池技术领域，特别是涉及一种电池监控单元、电池监控单元的制造方法及电池包。
背景技术
电池监控单元(Cell Supervision Circuit，简称CSC)是动力电池的控制系统，CSC中的部分发热器件发热量大，持续工作后会产生热集中现象，如果长期处于高温状态下其性能会下降，影响动力电池的安全性。
目前CSC一般通过散热片将热量传递至外部固定板，散热片与外部固定板均为大面积的金属板件，由于零部件的加工精度有限，散热片与外部固定板的平面度有偏差，二者刚性连接后的散热界面有间隙，导致热量在该散热界面之间传递时产生热阻不稳定问题，影响CSC的散热效果。
发明内容
本申请的目的是提供一种电池监控单元、电池监控单元的制造方法及电池包，该电池监控单元有利于改善散热过程中的热阻不稳定问题。
为此，本申请提供了一种电池监控单元，该电池监控单元包括：电路板；散热件，包括用于散热的金属板，金属板靠近电路板设置；固定板，与散热件连接，固定板包括本体部和形成于本体部上的弹性部，弹性部用 于填充金属板与固定板之间的间隙。
另一方面，本申请还提供了一种电池包，其包括如前所述的任一种电池监控单元。
另一方面，本申请还提供了一种如前所述的电池监控单元的制造方法，该制造方法包括：将散热件与固定板连接，以使固定板的弹性部抵靠至散热件的金属板；将散热件与电路板连接；将外壳盖合于电路板并连接。
本申请提供的一种电池监控单元及其制造方法，通过在与散热件连接的固定板上形成有弹性部，并使弹性部与散热件上用于散热的金属板紧密接触，以填充金属板与固定板之间的间隙，改善了散热过程中产生的热阻不稳定问题，提高了电池监控单元的散热效果。另外，本申请提供的一种电池包，采用如前所述的电池监控单元，提高了电池包的安全性和可靠性。
附图说明
从下面结合附图对本申请的具体实施方式的描述中可以更好地理解本申请，其中：
通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显,其中，相同或相似的附图标记表示相同或相似的特征。
图1是本申请实施例提供的一种电池监控单元的结构示意图；
图2是图1所示的电池监控单元的一种固定板的结构示意图；
图3是图1所示的电池监控单元的另一种固定板的结构示意图；
图4是图1所示的电池监控单元中的固定板与散热件的组装效果示意图；
图5是图4所示的电池监控单元中的固定板与散热件的分解结构示意图。
其中：
1-电路板；
11-电子元件；
2-散热件；
21-金属板；
211-压铆钉；
22-衬板；
221-台阶槽；
222-筋条；
223-双头紧固件；
3-固定板；
31-本体部；
32-弹性部；
a-第一表面；
b-第二表面；
321-连接片；
322-凹槽；
323-安装孔
33-切口；
4-导热垫；
5-外壳。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。下面的详细描述中公开了许多具体细节，以便全面理解本申请。但是，对于本领域技术人员来说，很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。本申请决不限于下面所提出的任何具体配置和算法，而是在不脱离本申请的精神的前提下覆盖了元素、部件和算法的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本申请造成不必要的模糊。
为了更好地理解本申请，下面结合图1至图5对本申请实施例的电池监控单元、电池监控单元的制造方法及电池包进行详细描述。
参阅图1，本申请实施例提供了一种电池监控单元，其包括：电路板1、散热件2和固定板3。
电路板1设置有电子元件11，电子元件11在工作时会由于电流通过自发热。散热件2包括金属板21，金属板21靠近电路板1设置，散热件2通过金属板21散热。固定板3与散热件2连接，固定板3包括本体部31和形成于本体部31上的弹性部32，弹性部32用于填充金属板21与固定板3之间的间隙。也就是说，当固定板3与散热件2连接时，弹性部32抵靠至金属板21。
在一些实施例中，电路板1、散热件2及固定板3依次层叠设置。电路板1上的电子元件11发热产生的热量将传递至下方的散热件2的用于散热的金属板21。由于固定板3的弹性部32抵靠至散热件2的金属板21，使得金属板21与固定板3紧密接触，避免了散热过程中因金属板21与固定板3之间的间隙导致的热阻不稳定问题。
本申请实施例提供的电池监控单元，通过在与散热件2连接的固定板3上形成有弹性部32，并使弹性部32与散热件2上用于散热的金属板21紧密接触，以填充金属板21与固定板3之间的间隙，改善了散热过程中产生的热阻不稳定问题，提高了CSC的散热效果。
下面结合附图进一步详细描述本申请实施例提供的CSC的具体结构。
参阅图2，固定板3的本体部31具有相对的第一表面a和第二表面b，第一表面a靠近金属板21设置，弹性部32由本体部31沿第二表面b至第一表面a的方向凹陷形成。
固定板3与散热件2连接，而弹性部32朝向金属板21凹陷，弹性部32由于自身的弹性可压缩，使得金属板21与弹性部32紧密接触，并能够自适应地调整金属板21与固定板3之间的间隙，从而在二者之间的形成稳定的散热界面，改善了由于金属板21和弹性部32自身的加工平面度误差引起的热阻不稳定问题。
进一步地，弹性部32两侧具有切口33，切口33贯穿本体部31，切口33可以释放弹性部32与本体部31的应力，提高弹性部32的弹性变形能力。弹性部32由本体部31冲压成型，其壁厚、成型高度、压缩变形量根 据具体的应用进行设计与验证。
进一步地，弹性部32包括间隔设置的两个连接片321，连接片321的一端相对于本体部31悬空设置，进一步提高弹性部32的弹性变形能力。
参阅图3，弹性部32上设置有凹槽322，凹槽322由弹性部32沿第一表面a至第二表面b的方向凹陷形成。弹性部32通过设置与自身的凹陷方向相反的凹槽322，可以吸收弹性部的弹性变形能，提高了弹性部32的刚度和强度。相对于图2所示的弹性部32结构，可以提高弹性部32的结构强度，增加弹性部32与金属板21之间的散热接触面积。
弹性部32的数量可以为一个或者两个以上，当固定板3的长度尺寸较小时，可以在本体部31上只形成一个弹性部32，当固定板3的长度尺寸较大时，可以在本体部31上间隔形成两个以上的弹性部32。
参阅图4，由于弹性部32由本体部31冲压成型，单独依靠弹性部32的弹性很难保证其耐久性。为了提高弹性部32的可靠性，金属板21与弹性部32固定连接。
具体来说，金属板21上可以设置紧固件211，例如压铆钉，弹性部32上设置相应的安装孔323，如图2、3所示，通过螺母与压铆钉211的配合将金属板21与弹性部32固定连接在一起。另外，金属板21与弹性部32也可以通过焊接固定连接在一起。
参阅图5，为了使金属板21与弹性部32实现可靠的连接，散热件2还包括支撑金属板21的衬板22，衬板22上设置有台阶槽221，金属板21嵌入台阶槽221内并与弹性部32接触。衬板22可以为塑胶件等非金属件，金属板21可以通过嵌件注塑的方式与衬板22一体注塑成型，也可以分别制作后，将两者直接组装起来即可。
当金属板21的长度较长时，台阶槽221内可以间隔设置有两个以上的筋条222，筋条222用于支撑金属板21。优选地，筋条222可以对应于相邻的两个弹性部32之间的间隔设置，以免筋条222影响金属板21与弹性部32之间的固定连接。
再次参阅图1，为了使电路板1与金属板21之间的散热界面稳定，电路板1与散热件2的金属板21之间还设置有导热垫4。导热垫4由弹性材 料制造而成，例如但不限于硅胶板，一方面导热垫4可以填充电路板1与金属板21之间间隙，另一方面通过导热垫4可以将电路板1的发热器件21产生的热量快速传递至金属板21，提高了导热效率。
由此，散热件2通过衬板22与电路板1、固定板3分别连接。具体来说，衬板22上设置有双头定位柱223，双头定位柱223包括同轴设置的公端和母端，公端具有外螺纹且朝向固定板2设置，母端具有内螺纹且朝向电路板1设置，电路板1通过螺钉与母端的配合而固定至衬板22，固定板2通过螺母与公端的配合而固定至衬板22。
电池监控单元还包括外壳5，外壳5与电路板1连接，以防止灰尘等杂质落入电路板1上。
另外，本申请实施例还提供了一种如前所述的电池监控单元的制造方法，该制造方法包括：
步骤S1：将散热件2与固定板3连接，以使固定板3的弹性部32抵靠至散热件2的金属板21；
步骤S2：将散热件2与电路板1连接；
步骤S3：将外壳5盖合于电路板1并连接。
本申请实施例提供的一种电池监控单元的制造方法，通过在与散热件2连接的固定板3上形成有弹性部32，并使弹性部32抵靠至散热件2上用于散热的金属板21，以填充金属板21与固定板3之间的间隙，改善了散热过程中产生的热阻不稳定问题，提高了电池监控单元的散热效果。
另外，本申请实施例还提供了一种电池包，包括如前所述的任一种电池监控单元，解决了电路板1局部发热的散热问题，提高了电池包的安全性和可靠性。
本领域技术人员应能理解，上述实施例均是示例性而非限制性的。在不同实施例中出现的不同技术特征可以进行组合，以取得有益效果。本领域技术人员在研究附图、说明书及权利要求书的基础上，应能理解并实现所揭示的实施例的其他变化的实施例。在权利要求书中，术语“包括”并 不排除其他装置或步骤；物品没有使用数量词修饰时旨在包括一个/种或多个/种物品，并可以与“一个/种或多个/种物品”互换使用”；术语“第一”、“第二”用于标示名称而非用于表示任何特定的顺序。权利要求中的任何附图标记均不应被理解为对保护范围的限制。权利要求中出现的多个部分的功能可以由一个单独的硬件或软件模块来实现。某些技术特征出现在不同的从属权利要求中并不意味着不能将这些技术特征进行组合以取得有益效果。

Claims (13)

  1. 一种电池监控单元，包括：
    电路板；
    散热件，包括用于散热的金属板，所述金属板靠近所述电路板设置；
    固定板，与所述散热件连接，所述固定板包括本体部和形成于所述本体部上的弹性部，所述弹性部用于填充所述金属板与所述固定板之间的间隙。
  2. 根据权利要求1所述的电池监控单元，其中，所述固定板的所述本体部具有相对的第一表面和第二表面，所述第一表面靠近所述金属板设置，所述弹性部由所述本体部沿所述第二表面至所述第一表面的方向凹陷形成。
  3. 根据权利要求2所述的电池监控单元，其中，所述弹性部的两侧具有切口，所述切口贯穿所述本体部。
  4. 根据权利要求3所述的电池监控单元，其中，所述弹性部包括间隔设置的两个连接片，所述连接片的一端相对于所述本体部悬空设置。
  5. 根据权利要求3所述的电池监控单元，其中，所述弹性部上设置有凹槽，所述凹槽由所述弹性部沿所述第一表面至所述第二表面的方向凹陷形成。
  6. 根据权利要求1至5任一项所述的电池监控单元，其中，所述弹性部的数量为一个或者两个以上，所述金属板与所述弹性部固定连接。
  7. 根据权利要求6所述的电池监控单元，其中，所述散热件还包括支撑所述金属板的衬板，所述衬板上设置有台阶槽，所述金属板嵌入所述台阶槽内并与所述弹性部接触。
  8. 根据权利要求7所述的电池监控单元，其中，所述台阶槽内设置有两个以上的筋条，所述筋条用于支撑所述金属板。
  9. 根据权利要求7所述的电池监控单元，其中，所述散热件通过所述衬板与所述电路板和所述固定板分别连接。
  10. 根据权利要求1所述的电池监控单元，其中，所述电路板与所述散热件的所述金属板之间还设置有导热垫。
  11. 根据权利要求1所述的电池监控单元，其中，还包括外壳，所述外壳与所述电路板连接，用于防止杂质落入电路板上。
  12. 一种电池包，包括如权利要求1至11任一项所述的电池监控单元。
  13. 一种如权利要求1所述的电池监控单元的制造方法，包括：
    将散热件与固定板连接，以使所述固定板的弹性部抵靠至所述散热件的金属板；
    将所述散热件与电路板连接；
    将外壳盖合于所述电路板并连接。
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