CN211929540U - Aluminum-shell lithium ion battery cell shell, battery cell, battery module and battery pack - Google Patents
Aluminum-shell lithium ion battery cell shell, battery cell, battery module and battery pack Download PDFInfo
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- CN211929540U CN211929540U CN202020788174.XU CN202020788174U CN211929540U CN 211929540 U CN211929540 U CN 211929540U CN 202020788174 U CN202020788174 U CN 202020788174U CN 211929540 U CN211929540 U CN 211929540U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses an aluminum hull lithium ion cell casing, electric core, battery module and battery package, aluminum hull lithium ion cell casing are equipped with casing utmost point post on its surface, and casing utmost point post is located between the anodal utmost point post and the negative pole utmost point post of aluminum hull lithium ion electric core, and casing utmost point post switches on with anodal utmost point post, and casing utmost point post passes through the insulating layer and the negative pole utmost point post of negative pole post and insulates. The positive pole post, the negative pole post and the shell pole post of each battery cell in the battery module are all connected to a low-voltage wire harness. The positive pole post, the negative pole post and the casing post of every cluster of aluminum-shell lithium ion electricity core are connected to the low-voltage wiring harness of battery package for the electric automobile to transmit positive pole post potential, negative pole post potential and casing post potential to the BMS, and the BMS obtains the voltage between positive pole post and casing post, the voltage between negative pole post and casing post, and the electricity core voltage based on these post potentials. The utility model discloses can make things convenient for the safe state of accurate control electric core voltage and control electric core.
Description
Technical Field
The utility model relates to a lithium ion battery technical field, in particular to aluminum hull lithium ion electricity core casing, electric core, battery module and battery package.
Background
At present, a battery pack for an electric automobile is mainly divided into 5 parts: module, BMS, structure, electric spare, thermal management spare. The BMS collects the voltage of each string of battery cells in the module through a low-voltage wire harness in the electric component. The module consists of an aluminum shell lithium ion battery cell and module parts, and the aluminum shell lithium ion battery cell mainly consists of an aluminum shell and an active electrode. Inside electric core, anodal utmost point post and aluminum hull switch on, and negative pole utmost point post and aluminum hull are insulating.
Before the active electrode is placed in the shell, in order to ensure the process feasibility, a certain proportion of the thickness ratio of the active electrode entering the shell is set, namely the thickness of the electrode after being wrapped by an insulating layer is smaller than the thickness of an inner cavity of the aluminum shell. If particulate matter impurity is transferred into on the electrode surface in electric core manufacture process, there is the existence of thickness ratio, and particulate matter impurity can not pierce through the insulating layer, can not discover unusually when electric core normal preparation. After the battery pack runs for a period of time on the market, the particle foreign matters can be extruded due to the expansion effect of the electrodes, so that the particle foreign matters penetrate through the insulating layer and contact with the inner cavity of the aluminum shell, the negative electrode is connected with the aluminum shell, and a short circuit in the battery core is formed. In addition, the electrical conductivity of the particle foreign matter can cause corrosion of the cell shell and even the risk of fire and explosion of the battery.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a first aim at overcomes prior art's shortcoming and not enough, provides an aluminum hull lithium ion battery cell casing, and this casing has increased electric core casing utmost point post.
A second object of the present invention is to provide an aluminum-shell lithium ion battery cell, which increases the potential of the battery shell.
A third object of the present invention is to provide an aluminum-shell lithium ion battery module.
A fourth object of the present invention is to provide a battery pack for an electric vehicle, which can facilitate the safety of the accurate control of the cell voltage and the monitoring of the cell.
The first purpose of the utility model is realized through the following technical scheme: the utility model provides an aluminum hull lithium ion cell casing, aluminum hull lithium ion cell casing is equipped with casing utmost point post on its surface, and casing utmost point post is located between the anodal utmost point post and the negative pole utmost point post of aluminum hull lithium ion electric core, and casing utmost point post switches on with anodal utmost point post, and casing utmost point post passes through the insulating layer and the negative pole utmost point post of negative pole post and insulates.
Preferably, the housing pole and the aluminum housing lithium ion battery cell housing are integrally formed.
The second purpose of the utility model is realized by the following technical scheme: the utility model provides an aluminum hull lithium ion cell, aluminum hull lithium ion cell includes active electrode and aluminum hull lithium ion cell casing, active electrode comprises anodal utmost point post and negative terminal, and anodal utmost point post and the protruding aluminum hull lithium ion cell casing that stretches out of negative terminal part, aluminum hull lithium ion cell casing is equipped with casing utmost point post on its surface, and casing utmost point post is located between anodal utmost point post and the negative terminal, and casing utmost point post switches on with anodal utmost point post, and casing utmost point post is insulating with negative terminal through the insulating layer of negative terminal.
The third purpose of the utility model is realized by the following technical scheme: the utility model provides an aluminum hull lithium ion battery module, aluminum hull lithium ion battery module has a plurality of the utility model discloses the second purpose aluminum hull lithium ion battery cell.
Preferably, the positive pole post, the negative pole post and the shell pole post of each battery cell in the battery module are all connected to a low-voltage wire harness, and the potential of the positive pole post, the potential of the negative pole post and the potential of the shell pole post are transmitted through the low-voltage wire harness.
The fourth purpose of the utility model is realized by the following technical scheme: the utility model provides a battery package for electric automobile, a serial communication port, including a plurality of battery module, BMS and low pressure pencil, every battery module has a string the utility model discloses the second purpose aluminium shell lithium ion cell, every string aluminium shell lithium ion cell's anodal utmost point post, negative pole post and casing utmost point post all are connected to the low pressure pencil, the low pressure pencil transmits anodal utmost point post electric potential, negative pole post electric potential and casing utmost point post electric potential for BMS, BMS obtains voltage between anodal utmost point post and the casing utmost point post, the voltage between negative pole post and the casing utmost point post based on these utmost point post electric potentials to and the electric core voltage between anodal utmost point post and the negative pole post.
The utility model discloses for prior art have following advantage and effect:
the utility model discloses set up the casing utmost point post at the aluminum hull lithium ion cell casing, realize increasing electric core casing electric potential, the aluminum hull lithium ion cell can directly judge out whether electric core is unusual through the voltage between the voltage of examining positive pole post and casing utmost point post, the voltage between negative pole post and casing utmost point post; the positive pole post, the negative pole post and the shell pole post of each battery cell in the battery module are all connected to a low-voltage wire harness, the potential of the positive pole post, the potential of the negative pole post and the potential of the shell post are transmitted through a low-voltage wire harness, the potential of the cell shell is transmitted to the BMS through the low-voltage wire harness in the battery pack, therefore, the aluminum-shell lithium ion battery module and the battery pack for the electric automobile can directly judge whether the battery cell is abnormal or not and whether the battery cell needs to be replaced or not by checking the voltage between the positive pole column and the shell pole column of each string of aluminum-shell lithium ion battery cell and the voltage between the negative pole column and the shell pole column, can conveniently and efficiently accurately control the voltage of the battery cell and monitor the safety state of the battery cell without a special monitoring system, if any abnormal condition exists in the battery cell in the using process, the abnormal condition can be found in time, so that the battery cell fault is avoided from causing larger loss.
Drawings
Fig. 1 is a schematic structural diagram of an aluminum-shell lithium ion battery cell according to the present invention.
Fig. 2 is a schematic view of the connection in the battery module according to the present invention.
Fig. 3 is a schematic diagram of the low-voltage sampling and transmission in the battery pack of the present invention.
Fig. 4 is a schematic circuit diagram of the aluminum-shell lithium ion cell of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Example 1
The embodiment discloses an aluminum-shell lithium ion battery cell, as shown in fig. 1, the aluminum-shell lithium ion battery cell comprises an active electrode and an aluminum-shell lithium ion battery cell shell 1, wherein the active electrode is composed of a positive electrode post 2 and a negative electrode post 3.
Wherein, the aluminum casing lithium ion cell casing is provided with casing utmost point post 4 on its surface, and the casing utmost point post and the aluminum casing lithium ion cell casing integrated into one piece of this embodiment.
The positive pole column and the negative pole column partially protrude out of the aluminum shell lithium ion battery cell shell, and the positive pole column can be connected with the shell through a large resistor and also can be directly connected with the shell to be conducted with the shell pole column. The cathode pole is wrapped by the insulating layer 6, and the cathode pole is insulated with the shell through the insulating layer, namely, is insulated with the shell pole.
The embodiment also discloses an aluminum-shell lithium ion battery module, as shown in fig. 2, which has a plurality of the above aluminum-shell lithium ion battery cells.
In the battery module, the positive pole post, the negative pole post and the casing pole post of each battery cell are all connected to the low-voltage wire harness, and the potential of the positive pole post, the potential of the negative pole post and the potential of the casing pole post are transmitted through the low-voltage wire harness 5.
The embodiment also discloses a battery pack for an electric vehicle, as shown in fig. 3, the battery pack includes a plurality of battery modules, a BMS, and a low voltage wire harness, each battery module having a string of the above aluminum-shell lithium ion battery cells.
The positive pole, the negative pole and the housing pole of each aluminum-shell lithium ion battery cell are all connected to the low-voltage wire harness 5 (a part of the connecting line is omitted in fig. 3), the low-voltage wire harness transmits the potential of the positive pole, the potential of the negative pole and the potential of the housing pole to the BMS, and the BMS obtains the voltage U1 between the positive pole and the housing pole, the voltage U2 between the negative pole and the housing pole and the cell voltage E between the positive pole and the negative pole based on the potentials of the poles.
As shown in fig. 4, in a normal cell, a path is formed between the positive electrode pole and the housing pole, and the negative electrode pole and the housing pole are insulated from each other, so that the path cannot be formed, and therefore, the voltage U1 obtained across R1 is 0, and the voltage U2 obtained across R2 is E. In the abnormal condition of the battery cell, namely when the battery cell expands to cause particle foreign matters on the surface of the electrode to penetrate through an insulating layer between the negative electrode and the shell, R2 drops, and the divided voltage of the two ends of R2 is U2 < E, and U1 > 0. When the voltage divided at the two ends of R2 is U2 < E, the battery cell shell can be corroded, and corrosion leakage can be caused in severe cases, so that the safety risk of the battery can be caused.
Therefore, based on the principle, whether the product is qualified or not can be judged through the inspection of U1, U2 and E before the battery cell leaves factory, whether the battery cell is abnormal or not can be judged through the inspection of U1, U2 and E after the battery cell is used for a period of time, and the problem battery cell can be identified at the initial stage of U2 < E because the corrosion of the shell requires a period of time to corrode and penetrate the aluminum shell.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (6)
1. The utility model provides an aluminum hull lithium ion battery cell casing which characterized in that, aluminum hull lithium ion battery cell casing is equipped with casing utmost point post on its surface, and casing utmost point post is located between the anodal utmost point post and the negative pole utmost point post of aluminum hull lithium ion battery cell, and casing utmost point post switches on with anodal utmost point post, and casing utmost point post is insulated with the negative pole utmost point post through the insulating layer of negative pole utmost point post.
2. The aluminum shell lithium ion battery cell casing of claim 1, wherein the casing terminal is integrally formed with the aluminum shell lithium ion battery cell casing.
3. The utility model provides an aluminum hull lithium ion battery cell, its characterized in that, aluminum hull lithium ion battery cell includes active electrode and aluminum hull lithium ion battery cell casing, active electrode comprises anodal utmost point post and negative terminal, and anodal utmost point post and the protruding aluminum hull lithium ion battery cell casing that stretches out of negative terminal part, aluminum hull lithium ion battery cell casing is equipped with casing utmost point post on its surface, and casing utmost point post is located between anodal utmost point post and the negative terminal, and casing utmost point post switches on with anodal utmost point post, and casing utmost point post passes through the insulating layer of negative terminal and insulates with the negative terminal.
4. An aluminum-can lithium-ion battery module, characterized in that the aluminum-can lithium-ion battery module has a plurality of aluminum-can lithium-ion cells of claim 3.
5. The aluminum-shell lithium ion battery module of claim 4, wherein the positive terminal, the negative terminal, and the housing terminal of each cell in the battery module are connected to a low voltage wire harness, and the positive terminal potential, the negative terminal potential, and the housing terminal potential are transmitted through the low voltage wire harness.
6. The utility model provides a battery package for electric automobile, its characterized in that, includes a plurality of battery module, BMS and low pressure pencil, every battery module has a string claim 3 aluminium casing lithium ion electricity core, every string aluminium casing lithium ion electricity core's anodal utmost point post, negative pole post and casing utmost point post all are connected to the low pressure pencil, the low pressure pencil transmits anodal utmost point post electric potential, negative pole post electric potential and casing utmost point post electric potential for BMS, BMS obtains the voltage between anodal utmost point post and the casing utmost point post, the voltage between negative pole post and the casing utmost point post based on these utmost point post electric potentials to and the electric core voltage between anodal utmost point post and the negative pole post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020788174.XU CN211929540U (en) | 2020-05-13 | 2020-05-13 | Aluminum-shell lithium ion battery cell shell, battery cell, battery module and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020788174.XU CN211929540U (en) | 2020-05-13 | 2020-05-13 | Aluminum-shell lithium ion battery cell shell, battery cell, battery module and battery pack |
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| CN211929540U true CN211929540U (en) | 2020-11-13 |
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| CN202020788174.XU Active CN211929540U (en) | 2020-05-13 | 2020-05-13 | Aluminum-shell lithium ion battery cell shell, battery cell, battery module and battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763919A (en) * | 2021-02-02 | 2021-05-07 | 江苏塔菲尔新能源科技股份有限公司 | Method and system for detecting internal short circuit abnormality of power battery |
| CN115020836A (en) * | 2022-08-05 | 2022-09-06 | 宁德时代新能源科技股份有限公司 | Battery cell early warning method, device, system, equipment, medium and program product |
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2020
- 2020-05-13 CN CN202020788174.XU patent/CN211929540U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763919A (en) * | 2021-02-02 | 2021-05-07 | 江苏塔菲尔新能源科技股份有限公司 | Method and system for detecting internal short circuit abnormality of power battery |
| CN112763919B (en) * | 2021-02-02 | 2024-01-09 | 江苏正力新能电池技术有限公司 | Method and system for detecting short circuit abnormality in power battery |
| CN115020836A (en) * | 2022-08-05 | 2022-09-06 | 宁德时代新能源科技股份有限公司 | Battery cell early warning method, device, system, equipment, medium and program product |
| CN115020836B (en) * | 2022-08-05 | 2022-11-15 | 宁德时代新能源科技股份有限公司 | Battery cell early warning method, device, system, equipment, medium and program product |
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