CN214043923U

CN214043923U - Adopt temperature to adopt pressure device, battery module and battery package

Info

Publication number: CN214043923U
Application number: CN202022777059.5U
Authority: CN
Inventors: 徐尚伟; 张国江; 万里平; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-08-24
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses a adopt temperature to adopt pressure equipment to put, battery module and battery package relates to battery technical field. The temperature and voltage acquisition device is used for acquiring the temperature and voltage of an electric core in a battery module and comprises an FPC main body and at least two FPC first branches. The FPC main body is connected with a pressing piece, and the pressing piece is electrically connected with a lug of the battery cell and used for collecting the voltage of the battery cell. The first branches of at least two FPCs are connected with the FPC main body respectively, the tail end of each first branch of the FPC extends to the side face of the battery cell and is connected with a temperature sensor, and the temperature sensor is used for collecting the temperature of the side face of the battery cell. And a spacer is arranged between the FPC main body and the lug of the battery cell. The utility model provides a adopt temperature to adopt and press device, the FPC material has obtained the maximize utilization, the cost is reduced. In addition, the long-term abrasion of the FPC main body and the high-temperature environment are avoided, and the service life of the FPC main body is prolonged.

Description

Adopt temperature to adopt pressure device, battery module and battery package

Technical Field

The utility model relates to a battery technology field especially relates to a adopt temperature to adopt pressure equipment to put, battery module and battery package.

Background

The power battery pack is an important component of the electric automobile, the battery module is the core of the power battery pack, and the voltage and the temperature of the battery core in the battery module are related to the energy of the whole power battery pack and whether the whole power battery pack is safe or not.

In the prior art, the collection of voltage and temperature is usually realized through FPC inside the battery module, the voltage is collected through the pole ear of electric core, and the temperature collection point is usually arranged on the side of the electric core. The lugs of the battery cell of the soft package battery module are arranged on two sides of the battery cell, so that the voltage and temperature are difficult to acquire, the required FPC board has large volume, FPC materials are wasted, and the cost is increased; and because the vibration of vehicle in-process of traveling, the utmost point ear of electric core and FPC long-term contact can increase the risk of FPC wearing and tearing, and can give FPC heat transfer along with the rising of utmost point ear temperature, increase the risk of FPC ageing failure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a temperature and pressure collecting device, a battery module and a battery pack, so as to save FPC materials and reduce cost; and reduces the risk of FPC wear and aging failure.

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

the utility model provides a adopt temperature to adopt pressure equipment for gather the temperature and the voltage of electric core in the battery module, it includes:

the voltage acquisition and control circuit comprises an FPC main body, wherein a pressure acquisition and control part is connected to the FPC main body and is electrically connected with a lug of the battery cell and used for acquiring the voltage of the battery cell;

the terminal of each FPC first branch extends to the side face of the battery cell and is connected with a temperature sensor, and the temperature sensor is used for collecting the temperature of the side face of the battery cell;

and a spacer is arranged between the FPC main body and the lug of the battery cell.

Optionally, the battery module further comprises a fixing structure, wherein the fixing structure is arranged on the FPC main body and is used for fixedly connecting the FPC main body with the battery module.

Optionally, the fixing structure is a plurality of connecting holes, the connecting holes are arranged on the FPC main body at intervals, and the FPC main body and the battery module are inserted or riveted and fixed through the connecting holes.

Optionally, the FPC main body is L-shaped, a long arm of the FPC main body is arranged corresponding to a tab end of the battery cell, and the pressure collecting piece is arranged on the long arm of the FPC main body; the long arm and the short arm of the FPC main body are connected with the FPC first branch.

Optionally, the first branch of the FPC on the long arm of the FPC main body is L-shaped, the short arm of the first branch of the FPC is connected to the FPC main body by welding, and the end of the long arm of the first branch of the FPC is connected to the temperature sensor.

Optionally, one end of the short arm of the FPC main body is provided with a patch connector, and the patch connector is electrically connected to the FPC main body.

Optionally, the spacer is made of foam, and the foam is adhered to the FPC main body and the tab of the battery cell.

Optionally, the temperature sensor is a patch temperature sensor, an epoxy glass cloth laminated board is arranged around the patch temperature sensor, and a heat conducting glue is arranged between the epoxy glass cloth laminated board and the patch temperature sensor.

A battery module comprises a plurality of battery cores arranged side by side and a temperature and pressure collecting device according to any one of the above.

The battery pack comprises a shell, a liquid cooling device and the battery module, wherein the liquid cooling device and the battery module are arranged in the shell, and the liquid cooling device is arranged below the battery module.

The utility model has the advantages that:

the utility model provides a adopt temperature to adopt and press device adopts the casting die through connecting in the FPC main part, adopts the voltage through adopting the casting die. Then set up the first branch of FPC according to the position of temperature acquisition point in the battery module, the first branch of FPC is connected with the FPC main part, and the end of the first branch of FPC extends to the side of electric core, and is connected with temperature sensor, and temperature sensor is used for gathering the temperature. For the whole setting of FPC among the prior art, the utility model provides a adopt temperature to adopt and press device makes the FPC material obtain the biggest utilization through setting up FPC main part and the first branch of FPC, makes the cost reduce as far as possible. In addition, the distance piece is arranged between the FPC main body and the lug of the battery cell, so that the contact between the FPC main body and the lug is reduced, the long-term abrasion of the FPC main body and the situation that the FPC main body is in a high-temperature environment are avoided, and the service life of the FPC main body is prolonged.

The utility model provides a battery module and battery package use foretell temperature of adopting and adopt pressure equipment, and the cost is reduced has prolonged life.

Drawings

Fig. 1 is a schematic structural diagram of a temperature and pressure collecting device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another temperature and pressure sampling device according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a first view structure of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a second view angle structure of a battery module according to an embodiment of the present invention.

In the figure:

100. a battery module; 101. a plastic support; 1011. connecting columns;

1. an FPC main body; 2. a FPC first branch; 3. a FPC second branch; 4. a patch temperature sensor; 5. a patch connector; 6. connecting holes; 7. a nickel sheet.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and fig. 2, the present embodiment provides a temperature and voltage collecting device for collecting the temperature and voltage of a battery core in a battery module 100, which includes an FPC main body 1 and at least two FPC first branches 2. The FPC main body 1 is connected with a pressing piece, and the pressing piece is electrically connected with a lug of the battery cell and used for collecting the voltage of the battery cell. At least two FPC first branches 2 are connected with FPC main part 1 respectively, and the end of every FPC first branch 2 all extends to the side of electric core, and is connected with temperature sensor, and temperature sensor is used for gathering the temperature of electric core side. And a spacer is arranged between the FPC main body 1 and the lug of the battery cell.

According to the temperature and pressure collecting device provided by the embodiment, the pressure collecting piece is connected to the FPC main body 1, and the voltage is collected through the pressure collecting piece. Then set up FPC first branch 2 according to the position of temperature acquisition point in battery module 100, FPC first branch 2 is connected with FPC main part 1, and the terminal of FPC first branch 2 extends to the side of electric core, and is connected with temperature sensor, and temperature sensor is used for gathering the temperature. Compared with the integral arrangement of the FPC in the prior art, the temperature and pressure collecting device provided by the embodiment utilizes the FPC material to the maximum extent by arranging the FPC main body 1 and the FPC first branch 2, so that the cost is reduced as much as possible. In addition, set up the distance piece between the utmost point ear of FPC main part 1 and electric core, reduce FPC main part 1 and utmost point ear contact, avoided FPC main part 1 long-term wearing and tearing and be in high temperature environment, prolonged FPC main part 1 life.

In the present embodiment, the FPC body 1 includes an insulating film, a copper foil, and an adhesive, and the copper foil is adhered in the insulating film on both sides by the adhesive. Adopt the casting die to be nickel piece 7, set up a plurality of nickel pieces 7 at the interval on FPC main part 1, the spacing distance between two adjacent nickel pieces 7 is the same with the utmost point ear interval between two adjacent electric cores, and the quantity of nickel piece 7 is the same with the quantity of electric core in the battery module 100. One end of the nickel sheet 7 is welded with the copper foil, and the other end is welded with the electrode lug of the battery cell to form a voltage acquisition loop. The hardness scale for metallic nickel is HRC28, equivalent to HV 274. The nickel plate 7 in this example was made of pure nickel with a hardness of 1/2H and a thickness of 0.3 mm. The temperature sensor is electrically connected with the FPC first branch 2 and sends the acquired temperature of the side face of the battery cell to the FPC main body 1.

Optionally, the spacer is made of foam, and the foam is adhered to the FPC main body 1 and the tabs of the battery cells. The wearing and tearing of the utmost point ear of FPC main part 1 and electric core can be avoided in the cotton setting of bubble, and can reduce the performance influence of utmost point ear intensification to FPC main part 1.

Optionally, the temperature sensor is a patch temperature sensor 4, an epoxy glass cloth laminated board is arranged around the patch temperature sensor 4, and a heat conducting glue is arranged between the epoxy glass cloth laminated board and the patch temperature sensor 4. The use of the patch temperature sensor 4 is technically simpler than that of a water droplet head temperature sensor, and the patch temperature sensor 4 can be welded automatically at lower cost. Epoxy glass cloth laminated board is used for protecting paster temperature sensor 4 not by the pressure loss, and the heat-conducting glue has reduced the calorific loss of electric core for the temperature that paster temperature sensor 4 gathered is more accurate.

In the battery module 100, a plurality of temperature collection points are generally set, and the positions of the temperature collection points are generally set according to the lowest temperature point and the highest temperature point of the battery cells in the battery module 100 according to experience. The FPC first branch 2 is set corresponding to the selected lowest temperature point and the selected highest temperature point respectively. A battery module 100 includes a plurality of electric cores arranged side by side, and the plurality of electric cores are fixed in groups through plastic brackets 101.

The positive tab and the negative tab of the battery cell in this embodiment are respectively disposed at two ends of the battery cell, so that two temperature and pressure collecting devices are required in one battery cell module, and the two temperature and pressure collecting devices respectively correspond to the positive tab and the negative tab of the battery cell.

Optionally, as shown in fig. 3 and 4, the temperature and pressure collecting device further includes a fixing structure disposed on the FPC main body 1 for fixedly connecting the FPC main body 1 to the battery module 100. In the present embodiment, the FPC main body 1 is fixedly connected to the plastic holder 101 in the battery module 100. The plastic support 101 is U-shaped, the electric core is arranged on the inner side of the U-shaped plastic support 101, one of the temperature and pressure collecting devices is fixed with the bottom end of the U-shaped plastic support 101, and the other temperature and pressure collecting device is fixed with a connecting plate at the opening end of the U-shaped plastic support 101.

Optionally, the fixing structure is a plurality of connecting holes 6, the connecting holes 6 are arranged on the FPC main body 1 at intervals, and the FPC main body 1 is inserted into or riveted with the battery module 100 through the connecting holes 6.

In this embodiment, as shown in fig. 1 and 3, one battery module 100 has a plurality of plastic brackets 101, a connecting column 1011 is disposed in the middle of the bottom end of the U-shaped plastic bracket 101, the connecting column 1011 is inserted into a connecting hole 6 of a temperature and pressure collecting device fixed to the bottom end of the U-shaped plastic bracket 101, the connecting hole 6 is a waist-shaped hole, the connecting column 1011 is a rivet column, and the rivet column is riveted and fixed after being inserted into the waist-shaped hole. Of course, in other embodiments, the connecting column 1011 can be fixed with the connecting hole 6.

In this embodiment, as shown in fig. 2 and 4, another temperature and pressure sampling device further includes a second FPC branch 3, one end of the second FPC branch 3 is connected to the FPC main body 1 by soldering, and the other end is provided with a connection hole 6. The connecting plate at the opening end of the U-shaped plastic support 101 is provided with a riveting column, the FPC second branch 3 is provided with a connecting hole 6, and the FPC second branch 3 is hung on the riveting column through the connecting hole 6. In this embodiment, three FPC second branches 3 are provided, respectively located at both ends and in the middle of the FPC main body 1, for fixing the FPC main body 1 to the plastic holder 101.

Optionally, the FPC main body 1 is L-shaped, the long arm of the FPC main body 1 is arranged corresponding to the tab end of the battery cell, and the pressure collecting piece is arranged on the long arm of the FPC main body 1; the long arm and the short arm of the FPC main body 1 are both connected with FPC first branches 2. In the present embodiment, a liquid cooling plate is disposed below the battery module 100, and it can be understood that, in general, the temperature of the battery cells in the battery module 100 near the liquid cooling plate is low, and the FPC first branch 2 disposed on the short arm of the FPC main body 1 is used for collecting the temperature of the lowest temperature point in the battery module 100. The temperature of the electric core far away from the liquid cooling plate is higher, and the first branch 2 of the FPC arranged on the long arm of the FPC main body 1 is used for collecting the temperature of the highest temperature point in the battery module 100.

Preferably, the FPC first branch 2 on the long arm of the FPC main body 1 is L-shaped, the short arm of the FPC first branch 2 is soldered to the FPC main body 1, and the end of the long arm of the FPC first branch 2 is connected to a temperature sensor. Such a setting is easier for temperature acquisition at the highest temperature point.

In this embodiment, one FPC first branch 2 is provided on the short arm of the FPC main body 1, and two FPC first branches 2 are provided on the long arm of the FPC main body 1. Of course, in other embodiments, the number of FPC first branches 2 on the short arm and the long arm of FPC body 1 is not limited and may be set as desired.

Optionally, one end of the short arm of the FPC body 1 is provided with a patch connector 5, and the patch connector 5 is electrically connected to the FPC body 1. The patch connector 5 is used for outputting the collected temperature and voltage to the outside, and the connection and use mode thereof are the prior art and are not described herein again.

In this embodiment, the solder joint protecting glue is coated on the solder joints between the FPC main body 1 and the first and

second FPC branches

2 and 3 to prevent the solder joints from rusting.

The embodiment further provides a battery module 100, which includes a plurality of battery cells arranged side by side and the temperature and pressure collecting device. A plurality of electric cores that set up side by side pass through plastic support 101 and fix in groups, and plastic support 101 corresponds the both ends of electric core utmost point ear and sets up one respectively and adopts the temperature and adopt the pressure equipment, adopts temperature to adopt pressure equipment and plastic support 101 fixed connection.

The embodiment further provides a battery pack, which comprises a housing, a liquid cooling device and the battery module 100, wherein the liquid cooling device and the battery module 100 are both arranged in the housing, and the liquid cooling device is arranged below the battery module 100.

The battery module 100 and the battery pack provided by the embodiment use the temperature and pressure collecting device, so that the cost is reduced, and the service life is prolonged.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a adopt temperature and adopt pressure device for gather the temperature and the voltage of electric core in battery module (100), its characterized in that includes:

the voltage acquisition device comprises an FPC main body (1), wherein a pressure acquisition part is connected to the FPC main body (1), and the pressure acquisition part is electrically connected with a lug of the battery cell and used for acquiring the voltage of the battery cell;

the battery cell comprises at least two FPC first branches (2), wherein the at least two FPC first branches (2) are respectively connected with the FPC main body (1), the tail end of each FPC first branch (2) extends to the side face of the battery cell and is connected with a temperature sensor, and the temperature sensor is used for collecting the temperature of the side face of the battery cell;

and a spacer is arranged between the FPC main body (1) and the lug of the battery cell.

2. The temperature and pressure collecting device according to claim 1, further comprising a fixing structure disposed on the FPC main body (1) for fixedly connecting the FPC main body (1) with the battery module (100).

3. The temperature and pressure collecting device according to claim 2, wherein the fixing structure is a plurality of connecting holes (6), the connecting holes (6) are arranged on the FPC main body (1) at intervals, and the FPC main body (1) and the battery module (100) are fixed by plugging or riveting through the connecting holes (6).

4. The temperature and pressure collecting device according to claim 1, wherein the FPC main body (1) is L-shaped, the long arm of the FPC main body (1) is arranged corresponding to the tab end of the battery cell, and the pressure collecting piece is arranged on the long arm of the FPC main body (1); the long arm and the short arm of the FPC main body (1) are connected with the FPC first branch (2).

5. The temperature and pressure recovery device according to claim 4, wherein the FPC first branch (2) on the long arm of the FPC main body (1) is L-shaped, the short arm of the FPC first branch (2) is connected with the FPC main body (1) in a welding manner, and the temperature sensor is connected to the tail end of the long arm of the FPC first branch (2).

6. A temperature and pressure producing device according to claim 4, wherein one end of the short arm of the FPC main body (1) is provided with a patch connector (5), and the patch connector (5) is electrically connected with the FPC main body (1).

7. The temperature and pressure collecting device according to claim 1, wherein the spacer is made of foam, and the foam is adhered to the FPC main body (1) and the tabs of the battery cells.

8. The temperature and pressure collecting device according to any one of claims 1 to 7, wherein the temperature sensor is a patch temperature sensor (4), an epoxy glass cloth laminated board is arranged around the patch temperature sensor (4), and a heat conducting glue is arranged between the epoxy glass cloth laminated board and the patch temperature sensor (4).

9. A battery module, characterized by comprising a plurality of battery cells arranged side by side and a temperature and pressure collecting device according to any one of claims 1 to 8.

10. A battery pack, comprising a housing, a liquid cooling device, and the battery module (100) of claim 9, wherein the liquid cooling device and the battery module (100) are disposed in the housing, and wherein the liquid cooling device is disposed below the battery module (100).