CN211530053U - Series elastic sheet for steel shell battery and battery module - Google Patents
Series elastic sheet for steel shell battery and battery module Download PDFInfo
- Publication number
- CN211530053U CN211530053U CN201920720573.XU CN201920720573U CN211530053U CN 211530053 U CN211530053 U CN 211530053U CN 201920720573 U CN201920720573 U CN 201920720573U CN 211530053 U CN211530053 U CN 211530053U
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- battery
- sheet
- steel
- bottom sheet
- elastic
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 210000000078 claw Anatomy 0.000 claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000178 monomer Substances 0.000 claims description 27
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 6
- 239000012634 fragment Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- 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
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- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses a series connection elastic sheet and a battery module for a steel shell battery, wherein the series connection elastic sheet comprises a bottom sheet, a downward convex lower bulge is arranged in the middle of the bottom sheet, and an elastic claw is arranged at the outer edge of the bottom sheet; the series elastic sheet is of a double-layer structure and is composed of an inner-layer steel sheet and an outer-layer aluminum sheet; the steel sheet comprises an inner layer bottom sheet and a plurality of inner layer elastic claws; the aluminum sheet comprises an outer layer bottom sheet and a plurality of outer layer elastic claws; the inner layer bottom plate and the outer layer bottom plate are arranged in a leaning and fixing mode to form the bottom plate, and the inner layer elastic claw and the outer layer elastic claw are arranged in a leaning and fixing mode to form the elastic claw. The series connection elastic sheet has the advantages of simple structure, convenient manufacture, small resistance and small point difference at the joint with the steel shell battery.
Description
Technical Field
The application relates to a series connection shell fragment and battery module for steel-shelled battery.
Background
The battery module is mainly composed of a plurality of battery cells and a battery holder (or called a battery bracket) for supporting the battery cells. In order to realize the series connection between the corresponding battery cells in the battery module, a battery series elastic sheet is usually installed in the battery holder. However, the material of the series elastic sheet used in the existing battery module is usually steel, the resistivity of the steel series elastic sheet is high, and the electric energy loss is large when the batteries are grouped; if the battery monomer in the module is a steel shell battery with an electrified shell, a larger point potential difference exists between the steel series elastic sheet and the battery shell, so that the connection part between the series elastic sheet and the battery shell is easily corroded.
Disclosure of Invention
The purpose of the application is: aiming at the problems, the series connection elastic sheet and the battery module for the steel shell battery are provided, the series connection elastic sheet is simple in structure, convenient to manufacture, small in resistance and small in point difference of the connection part of the series connection elastic sheet and the steel shell battery.
The technical scheme of the application is as follows:
a series connection elastic sheet for a steel shell battery comprises a bottom sheet, wherein a downward bulge protruding downwards is arranged in the middle of the bottom sheet, and a plurality of upward extending elastic claws are arranged on the outer edge of the bottom sheet and distributed at intervals around the bottom sheet;
the series elastic sheet is of a double-layer structure and is composed of an inner-layer steel sheet and an outer-layer aluminum sheet;
the steel sheet includes:
an inner layer backsheet, and
a plurality of inner layer elastic claws integrally and upwardly extending from the outer edge of the inner layer bottom sheet and arranged at intervals around the inner layer bottom sheet;
the aluminum sheet includes:
an outer backsheet, and
a plurality of outer layer elastic claws integrally and upwards extending from the outer edge of the outer layer bottom sheet and arranged at intervals around the outer layer bottom sheet;
the inner layer bottom plate and the outer layer bottom plate are arranged in a leaning mode and fixed with each other to form the bottom plate, and the inner layer elastic claw and the outer layer elastic claw are arranged in a leaning mode and fixed with each other to form the elastic claw.
On the basis of the technical scheme, the application also comprises the following preferable scheme:
the middle part of the inner layer bottom sheet is punched with a downward convex lower bulge I, the middle part of the outer layer bottom sheet is provided with a through hole I, and the lower bulge I penetrates out of the through hole I downwards to form the lower bulge.
The middle part of the outer layer bottom sheet is punched with a downward convex lower bulge II, and the lower bulge II is the lower bulge.
And the middle part of the inner layer bottom sheet is provided with a through hole II which is positioned right above the lower bulge II.
The inner layer bottom sheet and the outer layer bottom sheet are welded and fixed, and the inner layer elastic claw and the outer layer elastic claw are welded and fixed.
The inner layer bottom sheet and the outer layer bottom sheet are fixedly riveted, and the inner layer elastic claw and the outer layer elastic claw are fixedly riveted.
The bottom plate is circular.
The steel sheet is stainless steel.
A battery module comprises a battery clamp, wherein a battery inserting hole which is communicated up and down is formed in the battery clamp, a circle of annular inner flange which protrudes inwards in the radial direction is integrally arranged at the hole wall of the battery inserting hole, the battery inserting hole is divided into an upper hole section and a lower hole section which are positioned at two axial sides of the battery inserting hole by the annular inner flange, a series elastic sheet is embedded in the upper hole section, an upper battery monomer and a lower battery monomer are respectively arranged at the upper side and the lower side of the battery clamp, the upper battery monomer and the lower battery monomer are steel shell batteries of which the upper end surfaces are positively charged and the shells are negatively charged, and the lower end of the upper battery monomer and the upper end of the lower battery monomer are respectively inserted into the upper hole section and the lower hole section;
the series elastic sheet is of the structure, the bottom sheet is vertically abutted against the annular inner flange, the elastic claw is radially clamped between the shell of the upper battery monomer and the hole wall of the upper hole section, and the lower protrusion downwards penetrates through the central hole of the annular inner flange, extends into the lower hole section and is welded and fixed with the upper end face of the lower battery monomer.
The upper end faces of the upper battery monomer and the lower battery monomer are made of aluminum or steel.
The application has the advantages that:
1. the battery series connection elastic sheet is formed by fixedly compounding an inner steel sheet and an outer aluminum sheet, wherein the inner steel sheet is in contact with and clamps a steel shell of a battery, the steel-steel contact is realized, and the potential difference is basically zero; the steel of the inner layer has good mechanical property, so that the elastic claw of the series elastic sheet always keeps enough clamping force on the battery, and the battery is prevented from falling off from the battery clamp; the outer aluminum sheet conductivity is high for this series connection shell fragment has stronger electric conductive property, has reduced the series connection internal resistance of battery module.
2. The lower bulge of the series elastic sheet can be formed by an inner steel sheet and an outer aluminum sheet, so that the lower bulge can be welded and fixed with a battery on a steel end face very conveniently and can be welded and fixed with a battery on an aluminum end face very conveniently, and the potential difference of a welding part is basically zero.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an exploded view of a battery module according to an embodiment of the present disclosure;
fig. 2 is a schematic perspective view of a series spring in the embodiment of the present application;
fig. 3 is a front view of a series spring in an embodiment of the present application;
FIG. 4 is a cross-sectional view of a series spring in an embodiment of the present application;
FIG. 5 is a cross-sectional view of a series spring in another configuration according to the present disclosure;
wherein: 1-steel sheet, 2-aluminum sheet, 3-battery clamp, 4-upper battery monomer, 5-lower battery monomer, 1201-bottom sheet, 1202-elastic claw, 1202 a-lower protrusion, 101-inner bottom sheet, 102-inner elastic claw, 101 a-lower protrusion I, 101 b-through hole II, 201-outer bottom sheet, 202-outer elastic claw, 201 a-lower protrusion II, 201 b-through hole I, 301-battery insertion hole, 301 a-upper hole section, 301 b-lower hole section and 302-annular inner flange.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.
One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.
Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Fig. 1 shows an embodiment of the battery module according to the present invention, which is similar to some conventional battery modules in that the module is integrally injection-molded to form a battery holder 3, the battery holder 3 is formed with a plurality of battery insertion holes 301 penetrating vertically, and the battery insertion holes 301 are arranged in a matrix. A ring of annular inner flanges 302 protruding radially inward are integrally arranged on the wall of the battery insertion hole 301, and the annular inner flanges 302 divide the battery insertion hole 301 into an upper hole section 301a and a lower hole section 301b located at two axial sides (i.e., upper and lower sides) of the battery insertion hole 301. A battery series elastic piece for connecting adjacent batteries (i.e., an upper battery cell and a lower battery cell described later) in series is fitted into the upper hole section 301 a. The battery series connection elastic sheet comprises a round bottom sheet 1201, a downward convex bulge 1201a is formed in the middle of the bottom sheet 1201, and a plurality of upward extending elastic claws 1202 which are distributed at intervals around the bottom sheet are arranged at the outer edge of the bottom sheet 1201. The spring claws 1202 are abutted and contacted with the hole walls of the upper hole section 301a, the bottom plate 1201 is abutted and contacted with the annular inner flange 302 vertically, and the lower bulge 1201a in the middle of the bottom plate 1201 downwards penetrates through the central hole of the annular inner flange 302 and extends into the lower hole section 401 b. The upper and lower sides of the battery holder 3 are respectively disposed with an upper battery cell 4 and a lower battery cell 5. The upper battery monomer 4 and the lower battery monomer 5 are both steel shell batteries with positive upper end faces and negative shells. By "steel-can battery", it is meant that the housing of the battery is steel. The upper end surface of the battery is positively charged, and the shell is negatively charged, so that the upper end surface of the battery is electrically connected with the positive electrode of the battery inner core and is used as a positive electrode output terminal of the battery; and the shell of the battery is electrically connected with the negative electrode of the battery inner core and is a negative electrode output terminal of the battery. The lower end of the upper battery cell 4 is inserted downward into the upper hole section 301a of the battery insertion hole 301, and the lower end of the upper battery cell 4 presses each of the claws 1202 on the series elastic piece radially outward, so that the claws 1202 are radially clamped between the housing of the lower end of the upper battery cell 4 and the hole wall of the upper hole section 301a — the claws 1202 are pressed and elastically deformed. Thus, each of the claws 1202 on the series elastic sheet abuts against and is connected to the housing at the lower end of the upper battery cell 4, and applies a large clamping force to the housing at the lower end of the upper battery cell 4, thereby not only fixing the position of the upper battery cell 4, but also realizing the conductive connection between the housing (cathode) of the upper battery cell 4 and the series elastic sheet. The upper end of the lower battery monomer 5 is upwards inserted into the lower hole section 301b of the battery insertion hole 301, and the upper end surface (positive pole) of the lower battery monomer 5 is welded with the lower protrusion 1201a extending into the lower hole section 301b, so that the position of the lower battery monomer 5 is fixed, the conductive connection between the upper end surface (positive pole) of the lower battery monomer 5 and the series elastic sheet is realized, and the upper battery monomer 4 and the lower battery monomer 5 are connected in series by means of the series elastic sheet.
Referring to fig. 2 to 4, the key improvement of the present embodiment is: the series elastic sheet is of a double-layer structure and is composed of an inner-layer steel sheet 1 and an outer-layer aluminum sheet 2. Wherein, steel sheet 1 includes: the inner layer bottom sheet 101 is integrally and upwards extended from the outer edge of the inner layer bottom sheet, and a plurality of inner layer elastic claws 102 are arranged at intervals around the inner layer bottom sheet. The aluminum sheet 2 includes: the outer layer bottom piece 201 is integrally and upwards extended from the outer edge of the outer layer bottom piece, and a plurality of outer layer elastic claws 202 are arranged around the outer layer bottom piece at intervals. The inner backsheet 101 and the outer backsheet 201 are placed against each other and secured to each other to collectively form the backsheet 1201 described above. The inner layer finger 102 and the outer layer finger 202 are placed against each other and fixed to each other to form the aforementioned finger 1202.
It can be seen that the steel sheet 1 (specifically the inner layer spring claw 102 on the aluminum sheet 1) which is in direct contact with the aluminum shell of the upper battery cell 4 is the inner layer, the steel-steel contact, and the potential difference is basically zero.
In this embodiment, the upper end surfaces of the upper battery cell 4 and the lower battery cell 5 (particularly, the lower battery cell) are made of aluminum. It is understood that if the lower protrusions 1201a are also made of aluminum, the potential difference at the connection part of the lower battery cell 5 and the lower protrusions 1201a of the series connection elastic sheet is the smallest, and the welding of the upper end surface of the lower battery cell 5 and the lower protrusions 1201a of the series connection elastic sheet is more convenient (aluminum-aluminum welding). Therefore, in this embodiment, the structure of the series elastic sheet is further optimally designed: as shown in FIG. 4, a lower protrusion II 201a protruding downward is punched in the middle of the outer backsheet 201, and the lower protrusion II 201a is the above-mentioned lower protrusion 1201 a. The lower protrusion II 201a is a part of the outer bottom sheet 201 and is made of aluminum.
If the thickness of the lower bulge II 201b is larger, welding is not used, and for this reason, a through hole II 101b located right above the lower bulge II 201b is formed in the middle of the inner layer bottom sheet 101 in the embodiment.
If the upper end surfaces of the upper battery cell 4 and the lower battery cell 5 (especially, the lower battery cell) are made of steel in this embodiment. It is preferable that the lower protrusions 1201a are made of steel so that the potential difference at the junction of the lower battery cell 5 and the lower protrusions 1201a of the series connection spring plate is minimized, and the welding of the upper end surface of the lower battery cell 5 and the lower protrusions 1201a of the series connection spring plate is facilitated (steel-steel welding). In this case, we can perform the design of fig. 5 on the series elastic sheet: a downward convex lower bulge I101 a is punched in the middle of the inner layer bottom sheet 101, a through hole I201 b is formed in the middle of the outer layer bottom sheet 201, and the lower bulge I101 a penetrates out of the through hole I201 b downwards. The lower projection I101 a penetrating through the through-hole I201 b is the above-mentioned lower projection 1201a, and the lower projection I101 a is a part of the inner sheet 101 and is made of steel.
The inner bottom sheet 101 and the outer bottom sheet 201 may be welded or riveted. The inner layer latch claw 102 and the outer layer latch claw 202 may be welded or riveted.
The steel sheet 1 is made of stainless steel.
The inner layer bottom sheet 101 and the outer layer bottom sheet 102 are generally in the shape of a circle (without a through hole) or a circular ring (with a through hole I201 b and a through hole II 101 b).
The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.
Claims (10)
1. A series connection elastic sheet for a steel shell battery comprises a bottom sheet (1201), wherein a downward bulge (1201a) protruding downwards is formed in the middle of the bottom sheet (1201), and a plurality of upward extending elastic claws (1202) distributed at intervals around the bottom sheet are arranged at the outer edge of the bottom sheet (1201);
it is characterized in that the preparation method is characterized in that,
the series elastic sheet is of a double-layer structure and is composed of an inner-layer steel sheet (1) and an outer-layer aluminum sheet (2);
the steel sheet (1) comprises:
an inner layer backsheet (101), and
a plurality of inner layer elastic claws (102) integrally and upwards extend from the outer edge of the inner layer bottom sheet and are arranged at intervals around the inner layer bottom sheet;
the aluminum sheet (2) includes:
an outer backsheet (201), and
a plurality of outer layer elastic claws (202) integrally and upwardly extending from the outer edge of the outer layer bottom sheet and arranged at intervals around the outer layer bottom sheet;
the inner layer bottom plate (101) and the outer layer bottom plate (201) are arranged in an abutting mode and fixed with each other to form the bottom plate (1201), and the inner layer elastic claw (102) and the outer layer elastic claw (202) are arranged in an abutting mode and fixed with each other to form the elastic claw (1202).
2. The series connection shrapnel for the steel shell battery as claimed in claim 1, wherein the middle part of the inner bottom sheet (101) is punched with a downward convex lower bulge I (101a), the middle part of the outer bottom sheet (201) is provided with a through hole I (201b), and the lower bulge I (101a) penetrates through the through hole I (201b) downwards to form the lower bulge (1201 a).
3. The series connection elastic sheet for the steel-shell battery as claimed in claim 1, wherein the middle part of the outer bottom sheet (201) is punched with a downward convex lower protrusion II (201a), and the lower protrusion II (201a) is the lower protrusion (1201 a).
4. The series connection elastic sheet for the steel shell battery as claimed in claim 3, wherein the middle part of the inner bottom sheet (101) is provided with a through hole II (101b) which is positioned right above the lower bulge II (201 a).
5. The series connection elastic sheet for the steel-shell battery as claimed in claim 1, wherein the inner bottom sheet (101) and the outer bottom sheet (201) are welded and fixed, and the inner spring claw (102) and the outer spring claw (202) are welded and fixed.
6. The series connection elastic sheet for the steel-shell battery as claimed in claim 1, wherein the inner bottom sheet (101) and the outer bottom sheet (201) are riveted, and the inner snap claw (102) and the outer snap claw (202) are riveted.
7. The series shrapnel for a steel can battery according to claim 1, characterized in that the bottom sheet (1201) is circular.
8. Series connection spring plate for steel-shelled batteries according to claim 7, characterized in that the steel plate (1) is stainless steel.
9. A battery module comprises a battery clamp (3), wherein the battery clamp (3) is provided with a battery inserting hole (301) which is communicated up and down, a ring of annular inner flanges (302) protruding inwards in the radial direction are integrally arranged on the wall of the battery insertion hole (301), the annular inner flange (302) divides the battery insertion hole (301) into an upper hole section (301a) and a lower hole section (301b) located on both axial sides thereof, a series elastic sheet is embedded in the upper hole section (301a), an upper battery monomer (4) and a lower battery monomer (5) are respectively arranged on the upper side and the lower side of the battery clamp (3), the upper battery monomer (4) and the lower battery monomer (5) are both steel shell batteries with positive upper end surfaces and negative shells, the lower end of the upper battery cell (4) and the upper end of the lower battery cell (5) are inserted into the upper hole section (301a) and the lower hole section (301b), respectively;
the series connection shrapnel is the series connection shrapnel as any one of claims 1 to 8, the bottom plate (1201) is vertically abutted with the annular inner flange (302), the elastic claw (1202) is radially clamped between the outer shell of the upper battery monomer (4) and the hole wall of the upper hole section (301a), and the lower bulge (1201a) downwards penetrates through the central hole of the annular inner flange (302) to extend into the lower hole section (301b) and is welded and fixed with the upper end face of the lower battery monomer (5).
10. The battery module according to claim 9, wherein the upper end surfaces of the upper unit cell (4) and the lower unit cell (5) are made of aluminum or steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720573.XU CN211530053U (en) | 2019-05-20 | 2019-05-20 | Series elastic sheet for steel shell battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720573.XU CN211530053U (en) | 2019-05-20 | 2019-05-20 | Series elastic sheet for steel shell battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211530053U true CN211530053U (en) | 2020-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920720573.XU Expired - Fee Related CN211530053U (en) | 2019-05-20 | 2019-05-20 | Series elastic sheet for steel shell battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211530053U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165132A (en) * | 2019-05-20 | 2019-08-23 | 苏州安靠电源有限公司 | Compound confluence piece for battery modules |
| CN113517512A (en) * | 2021-06-16 | 2021-10-19 | 东风时代(武汉)电池系统有限公司 | Mounting bracket of battery module |
-
2019
- 2019-05-20 CN CN201920720573.XU patent/CN211530053U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165132A (en) * | 2019-05-20 | 2019-08-23 | 苏州安靠电源有限公司 | Compound confluence piece for battery modules |
| CN113517512A (en) * | 2021-06-16 | 2021-10-19 | 东风时代(武汉)电池系统有限公司 | Mounting bracket of battery module |
| CN113517512B (en) * | 2021-06-16 | 2022-10-18 | 东风时代(武汉)电池系统有限公司 | Mounting bracket of battery module |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200918 Termination date: 20210520 |
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| CF01 | Termination of patent right due to non-payment of annual fee |