CN220106818U

CN220106818U - Power battery information acquisition structure and acquisition system

Info

Publication number: CN220106818U
Application number: CN202321474627.1U
Authority: CN
Inventors: 陈保国; 李泽中; 张福增
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-11-28
Anticipated expiration: 2033-06-09

Abstract

The utility model belongs to the technical field of power batteries, and discloses a power battery information acquisition structure and an acquisition system. The power battery information acquisition structure comprises an electric core, an FPC acquisition line and an NTC acquisition line. The battery cell comprises two electrode lugs, wherein one electrode lug is a positive electrode lug, the other electrode lug is a negative electrode lug, and the positive electrode lug and the negative electrode lug are respectively arranged at two ends of the battery cell; the FPC collecting wire comprises a first FPC wire and a second FPC wire, the first FPC wire is fixedly arranged on the outer side of one lug, and the second FPC wire is fixedly arranged on the outer side of the other lug; one end of the NTC acquisition wire is provided with a first switching terminal, the other end of the NTC acquisition wire forms an NTC end, the first switching terminal is connected with a first FPC wire, and the NTC end is fixedly arranged at the top of the battery cell. The acquisition system provided by the utility model comprises the power battery information acquisition structure, and can directly acquire the voltage and temperature information of the battery cell by adopting a direct acquisition mode, so that the information acquisition accuracy is improved.

Description

Power battery information acquisition structure and acquisition system

Technical Field

The utility model relates to the technical field of power batteries, in particular to a power battery information acquisition structure and an acquisition system.

Background

In recent years, sales of new energy electric vehicles are frequently created and increased, and battery technologies of electric vehicles are also rapidly developed. Safe and efficient power battery systems are continually technically sought by large battery manufacturers. In order to ensure stable operation of the power battery in the use process, the running state of the power battery needs to be monitored in real time, wherein the voltage and the temperature of a battery system need to be accurately and stably monitored as key parameters.

At present, a soft package battery system monitoring project mainly uses the voltage and the temperature of a soft package battery cell (short for battery cell), and information of the voltage and the temperature of the battery cell is collected in a mode of a sampling line and a sampling terminal (voltage terminal and NTC). The main implementation forms are two types: the first is that a voltage terminal (simply called terminal) on a sampling line is welded on a busbar of a fixed battery cell tab (welded fixed) to collect the voltage of a battery cell, and simultaneously an NTC is welded on the busbar to collect the temperature of the busbar; the second is that the voltage collection adopts the same mode as the first, and the temperature collection is that NTC is placed on the metal component of the fixed cell, and the temperature of the metal component is collected.

The existing battery cell acquisition mode is basically to install a voltage terminal and an NTC on a part matched with a battery cell, and indirectly transmit the voltage and the temperature of the battery cell through the matched part. The acquisition mode has the problem of transmission distortion, and the state information of the battery cells cannot be accurately reflected. Meanwhile, due to the addition of auxiliary acquisition parts (such as the bus bars and the metal parts for fixing the battery cells), the overall weight of the battery system is increased, and the energy density of the battery system is reduced.

Disclosure of Invention

The utility model aims to provide a power battery information acquisition structure and an acquisition system, which are capable of improving the accuracy of voltage and temperature information and reducing the number of parts compared with the existing structure which needs to be arranged on auxiliary acquisition parts, so that the overall weight of the acquisition structure is reduced, and the energy density is improved.

To achieve the purpose, the utility model adopts the following technical scheme:

a power cell information acquisition structure comprising:

the battery cell comprises two electrode lugs, wherein one electrode lug is a positive electrode lug, the other electrode lug is a negative electrode lug, and the positive electrode lug and the negative electrode lug are respectively arranged at two ends of the battery cell;

the FPC collection line comprises a first FPC line and a second FPC line, the first FPC line is fixedly arranged on the outer side of one lug, and the second FPC line is fixedly arranged on the outer side of the other lug;

the NTC collection line, the one end of NTC collection line is equipped with first transfer terminal, the other end of NTC collection line forms the NTC end, first transfer terminal with first FPC line is connected, the NTC end sets firmly the top of electric core.

Optionally, the first FPC wire is adhered to the outer side of one of the tabs through double-sided adhesive tape.

Optionally, a second switching terminal and a third switching terminal are arranged on the first FPC, the second switching terminal is connected to one of the tabs through welding, and the first switching terminal is connected to the third switching terminal through welding.

Optionally, the first FPC line includes a collection board, and the second switching terminal and the third switching terminal are respectively disposed at two ends of the collection board.

Optionally, the second FPC wire is adhered to the outer side of the other tab through a double-sided adhesive tape.

Optionally, a fourth switching terminal is arranged on the second FPC, and the fourth switching terminal is connected to the outer side of the other tab through welding.

Optionally, the NTC terminal is fixed to the top of the cell by a structural adhesive.

Optionally, the power battery information acquisition structure further comprises a filling colloid, and the two filling colloids are respectively wrapped at two ends of the electric core.

Optionally, the NTC acquisition line is set to the L type structure, the L type structure includes interconnect and is first connecting plate and the second connecting plate that the right angle set up, first connecting plate is kept away from the one end of second connecting plate forms the NTC end, the second connecting plate is kept away from the one end of first connecting plate is equipped with first adapter terminal.

The acquisition system comprises a data analyzer, and the power battery information acquisition structure according to any one of the schemes, wherein the data analyzer is electrically connected with the first FPC wire or the data analyzer is electrically connected with the second FPC wire.

The utility model has the beneficial effects that: according to the power battery information acquisition structure provided by the utility model, the first FPC wire is directly arranged on the outer side of one tab, the second FPC wire is directly arranged on the outer side of the other tab, the NTC end of the NTC acquisition wire is directly fixedly arranged on the top of the battery core, and the voltage and temperature information of the battery core is directly acquired in a direct acquisition mode.

The utility model also provides a collection system which comprises the data analyzer and the power battery collection structure, wherein the data analyzer is electrically connected with the first FPC wire or the data analyzer is electrically connected with the second FPC wire. After the NTC end of the NTC acquisition line acquires the temperature of the battery cell, the temperature is transmitted to the first FPC line through the first transfer terminal, the first FPC line or the second FPC line transmits temperature information and voltage information to the data analyzer, the data analyzer analyzes the acquired information, and by using the power battery acquisition structure, the accuracy of voltage and temperature monitoring is improved, and the energy density of the acquisition system is also improved.

Drawings

Fig. 1 is an exploded view of a power battery information collection structure provided by an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a weld formed after welding a tab according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a second switching terminal provided in an embodiment of the present utility model after being disposed at a tab;

fig. 4 is a schematic structural diagram of the double-sided adhesive tape provided in the embodiment of the present utility model after the double-sided adhesive tape is disposed on the second FPC line;

fig. 5 is a schematic structural diagram of a first FPC cable and a second FPC cable provided in the embodiment of the present utility model after being respectively disposed at two ends of a battery cell;

fig. 6 is a schematic structural diagram of an NTC acquisition wire provided in an embodiment of the present utility model after being disposed on top of an electrical property;

fig. 7 is a schematic structural diagram of the first adapting terminal welded to the third adapting terminal according to the embodiment of the present utility model;

FIG. 8 is a schematic diagram of a structure of a gel filler according to an embodiment of the present utility model;

fig. 9 is a cross-sectional view of a filling compound provided in an embodiment of the present utility model wrapped at one end of a battery cell provided with a first FPC line.

In the figure:

100. a battery cell; 110. a tab; 111. welding seams; 210. a first FPC wire; 211. a second switching terminal; 212. a third switching terminal; 213. a collection plate; 220. a second FPC wire; 221. a fourth switching terminal; 300. an NTC acquisition line; 310. a first switching terminal; 320. an NTC end; 400. double faced adhesive tape; 500. structural adhesive; 600. and (5) filling colloid.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a power battery information acquisition structure for acquiring voltage and temperature of a soft package battery core of a power battery in real time, so as to solve the problems that in the prior art, a voltage terminal and an NTC are arranged on a part matched with the battery core to acquire voltage and temperature information, information transmission distortion exists, and state information of the soft package battery core cannot be directly acquired and accurately reflected.

As shown in fig. 1 to 9, the power battery information collection structure includes a battery cell 100, an FPC collection wire, and an NTC collection wire 300. The battery cell 100 includes two tabs 110, one of which is a positive tab and the other of which is a negative tab, and the positive tab and the negative tab are respectively disposed at two ends of the battery cell 100. During assembly, the battery cell 100 generally comprises at least two parallel battery cell monomers, when all battery cell monomers are connected in parallel, the tooling is used for bending the corresponding sub-tabs of each battery cell monomer, and the bent sub-tabs are connected through welding to form the tab 110, and the welded tab 110 is formed with the welding seam 111. The FPC collection line comprises a first FPC line 210 and a second FPC line 220, wherein the first FPC line 210 is fixedly arranged on the outer side of one tab 110, and the second FPC line 220 is fixedly arranged on the outer side of the other tab 110. For example, the first FPC line 210 is fixed on the outer side of the positive electrode tab, and the second FPC line 220 is fixed on the outer side of the negative electrode tab. Alternatively, the first FPC line 210 is fixed on the outer side of the negative electrode tab, and the second FPC line 220 is fixed on the outer side of the positive electrode tab. One end of the NTC acquisition wire 300 is provided with a first switching terminal 310, the other end of the NTC acquisition wire 300 forms an NTC end 320, the first switching terminal 310 is connected with the first FPC wire 210, and the NTC end 320 is fixedly arranged at the top of the battery cell 100 to acquire temperature information of the battery cell 100.

The power battery information acquisition structure that this embodiment provided, first FPC line 210 direct mount in the outside of one of them utmost point ear 110, second FPC line 220 direct mount in the outside of another utmost point ear 110, NTC end 320 of NTC acquisition line 300 directly sets firmly in the top of electric core 100, adopts the mode of adopting directly, directly acquires electric core 100's voltage and temperature information, compares on the auxiliary acquisition part with current needs, has improved voltage and temperature information's accuracy, has also reduced part quantity simultaneously, and then has reduced the whole weight of acquisition structure, has improved energy density.

In the present embodiment, the first FPC line 210 is adhered to the outer side of one tab 110 through the double-sided tape 400, and the second FPC line 220 is adhered to the outer side of the other tab 110 through the double-sided tape 400. The double-sided adhesive tape 400 has strong adhesion and high temperature resistance, and simultaneously, the manufacturing cost is low, thereby improving the efficiency of the bonding process.

Further, the first FPC wire 210 is provided with a second switching terminal 211 and a third switching terminal 212, the second switching terminal 211 is connected to one of the tabs 110 by welding, and the first switching terminal 310 of the NTC pick-up wire 300 is connected to the third switching terminal 212 by welding. The welding connection strength is high, the welding operation is simple, and the processing efficiency is improved.

Preferably, the first FPC line 210 includes a pickup plate 213, and the second and third transfer terminals 211 and 212 are respectively provided at both ends of the pickup plate 213. During installation, the collecting plate 213 can be adhered to the outer side of the tab 110, the first switching terminal 310 is welded to the tab 110, the first switching terminal 310 on the NTC collecting wire 300 is welded to the third switching terminal 212, the second switching terminal 211 and the third switching terminal 212 are respectively arranged at two ends of the collecting plate 213, overlapping welding operation areas in the welding process are avoided, and accuracy of welding operation is improved.

Optionally, a fourth switching terminal 221 is disposed on the second FPC wire 220, and the fourth switching terminal 221 is connected to the outer side of the other tab 110 through welding, so that the welding connection strength is high, and the connection reliability is ensured.

The NTC acquisition wire 300 in this embodiment is configured as an L-shaped structure, where the L-shaped structure includes a first connecting plate and a second connecting plate that are connected to each other and are arranged at right angles, one end of the first connecting plate far away from the second connecting plate forms an NTC end 320, and the first transfer terminal 310 is disposed at one end of the second connecting plate far away from the first connecting plate. When the NTC acquisition line 300 is installed, the first connecting plate is arranged at the top of the battery cell 100, the second connecting plate is attached to one side of the battery cell 100, and the structure is simple and the installation is easy.

Specifically, the NTC terminal 320 is fixed on the top of the battery cell 100 through the structural adhesive 500, and the structural adhesive 500 has high adhesive strength, is aging-resistant, fatigue-resistant, corrosion-resistant, and can improve the connection stability between the NTC terminal 320 and the battery cell 100.

The power battery information acquisition structure further comprises a filling colloid 600, and the two filling colloids 600 are respectively wrapped at two ends of the battery cell 100. The filling colloid 600 can fill the gap between the tab 110 and the FPC collection line, and can also fill the gap between the tab 110, the FPC collection line and the partial NTC collection line 300, fix the structures of the tab 110, the FPC collection line and the partial NTC collection line 300, prevent vibration and deformation from occurring in the use process, and further improve the reliability of information collection.

Illustratively, the filling gel 600 may be an epoxy potting gel, a silicone potting gel, a polyurethane potting gel, a UV potting gel, a hot melt potting gel, or an organosilicon potting gel, as desired. Preferably, the width of the filling compound 600 is larger than the width of the battery cell 100, and it is noted that the width of the battery cell 100 refers to the thickness of the battery cell 100 in this embodiment, and the arrangement is such that the filling compound 600 fully wraps the tab 110, the FPC collection wire or part of the NTC collection wire 300, so as to achieve stable fixation between the tab 110 and the FPC collection wire and between the tab 110, the FPC collection wire and part of the NTC collection wire 300.

The embodiment also provides a collection system, which comprises a data analyzer, the collection system further comprises the power battery information collection structure, and the data analyzer is electrically connected with the first FPC line 210 or the data analyzer is electrically connected with the second FPC line 220.

In the acquisition system, the data analyzer is electrically connected with the first FPC line 210, or the data analyzer is electrically connected with the second FPC line 220, after the temperature of the battery cell 100 is acquired by the NTC end 320 of the NTC acquisition line 300, the temperature information and the voltage information are transmitted to the first FPC line 210 through the first switching terminal 310, the first FPC line 210 or the second FPC line 220 together transmit the temperature information and the voltage information to the data analyzer, the data analyzer analyzes the acquired information, and by using the power battery acquisition structure, the accuracy of voltage and temperature monitoring is improved, and the energy density of the acquisition system is also improved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Power battery information acquisition structure, its characterized in that includes:

the battery cell (100) comprises two electrode lugs (110), wherein one electrode lug is an anode lug, the other electrode lug is a cathode lug, and the anode lug and the cathode lug are respectively arranged at two ends of the battery cell (100);

the FPC collection line comprises a first FPC line (210) and a second FPC line (220), wherein the first FPC line (210) is fixedly arranged on the outer side of one lug (110), and the second FPC line (220) is fixedly arranged on the outer side of the other lug (110);

the NTC collection line (300), the one end of NTC collection line (300) is equipped with first adapter terminal (310), the other end of NTC collection line (300) forms NTC end (320), first adapter terminal (310) with first FPC line (210) are connected, NTC end (320) set firmly in the top of electric core (100).

2. The power battery information collection structure according to claim 1, wherein the first FPC line (210) is adhered to the outer side of one of the tabs (110) through a double sided tape (400).

3. The power battery information collection structure according to claim 2, wherein a second switching terminal (211) and a third switching terminal (212) are provided on the first FPC line (210), the second switching terminal (211) is connected to one of the tabs (110) by welding, and the first switching terminal (310) is connected to the third switching terminal (212) by welding.

4. A power battery information collection structure according to claim 3, wherein the first FPC line (210) includes a collection board (213), and the second transfer terminal (211) and the third transfer terminal (212) are respectively provided at both ends of the collection board (213).

5. The power battery information collection structure according to claim 2, wherein the second FPC line (220) is adhered to the outside of the other tab (110) through a double-sided tape (400).

6. The power battery information collection structure according to claim 5, wherein a fourth switching terminal (221) is provided on the second FPC line (220), and the fourth switching terminal (221) is connected to the outside of the other tab (110) by welding.

7. The power battery information collection structure according to claim 1, wherein the NTC collection wire (300) is provided in an L-shaped structure including a first connection plate and a second connection plate that are connected to each other and are provided at right angles, one end of the first connection plate, which is far away from the second connection plate, forms the NTC end (320), and one end of the second connection plate, which is far away from the first connection plate, is provided with the first connection terminal (310).

8. The power cell information acquisition structure of claim 7, wherein the NTC terminal (320) is fixed to the top of the cell (100) by a structural adhesive (500).

9. The power battery information acquisition structure according to claim 1, further comprising a filling gel (600), wherein two filling gels (600) are respectively wrapped at two ends of the electric core (100).

10. The acquisition system comprising a data analyzer, characterized in that the acquisition system further comprises a power cell information acquisition structure according to any one of claims 1-9, the data analyzer being electrically connected to the first FPC line (210) or the data analyzer being electrically connected to the second FPC line (220).