CN215896633U

CN215896633U - Battery module and battery pack

Info

Publication number: CN215896633U
Application number: CN202122410329.3U
Authority: CN
Inventors: 李明远; 李宏太
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-22
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to a battery module and a battery pack. This battery module includes the busbar and is used for detecting the temperature-sensing unit of the temperature of busbar, be equipped with the joint structure on the busbar, the temperature-sensing unit with the joint structure joint is connected. According to the battery module, the temperature sensing unit is directly connected to the clamping structure of the busbar in a clamping manner, so that the stability of connection between the temperature sensing unit and the detected busbar is improved, the falling risk of the temperature sensing unit after long-time use is reduced, and the use reliability of the temperature sensing unit is improved.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack with the same.

Background

With the development of science and technology, the application prospect of electric automobiles is better and better, wherein electric automobiles mainly use electric energy such as batteries and the like as power sources and energy storage units of the electric automobiles. In practical applications, the temperature has a large influence on the performance of the battery, and therefore, the monitoring of the temperature state of the battery and the battery pack during operation can effectively maintain the high performance of the battery.

At present, a temperature sensor is generally arranged in a package, and the package is fixed on a bus bar of a battery pack in an adhesion mode so as to achieve the purpose of monitoring the temperature state of the battery pack in the operation process.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a battery module which is not easily detached and is safe and reliable.

In order to achieve the above purpose, the present invention provides a battery module, which includes a bus bar and a temperature sensing unit for detecting a temperature of the bus bar, wherein the bus bar is provided with a clamping structure, and the temperature sensing unit is connected with the clamping structure in a clamping manner.

Compared with the prior art, the technical scheme has the following advantages:

according to the battery module, the temperature sensing unit is directly connected to the clamping structure of the bus bar in a clamping manner, so that the stability of connection between the temperature sensing unit and the bus bar is improved, the falling risk of the temperature sensing unit after long-time use is reduced, and the use reliability of the temperature sensing unit is improved.

Another object of the present invention is to provide a battery pack having the above battery module.

In order to achieve the above object, the present invention provides a battery pack including the battery module as described above.

Compared with the prior art, the technical scheme has the following advantages:

the battery pack is provided with the battery module, so that the falling risk of the temperature sensing unit after long-time use is effectively reduced, and the use reliability of the temperature sensing unit is improved, so that the temperature of the battery pack can be timely and accurately measured, and the battery pack has the advantages of stable performance, safety in use, longer service life and the like.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

fig. 1 is a schematic structural view of a battery module according to a first viewing angle;

fig. 2 is a second perspective view schematically illustrating the battery module shown in fig. 1;

fig. 3 is a schematic structural view of a temperature sensing unit in the battery module shown in fig. 1;

FIG. 4 is a schematic view illustrating an assembled and disassembled structure of the temperature sensing unit and the thermal conductive adhesive layer shown in FIG. 3;

fig. 5 is a schematic view of an assembled structure of the battery pack of the present invention;

fig. 6 is a schematic view of the overall structure of the battery pack of the present invention.

The reference numbers illustrate:

100. a battery module;

10. a temperature sensing unit; 101. a temperature sensor; 102. an FFC acquisition line; 103. a clamping sleeve; 104. a circuit board; 1041. a limiting member; 105. a base plate; 106. an insulating film;

11. a bus bar; 110. a clamping structure; 1101. a clamping hole; 111. a limiting part; 112. a first surface; 113. a second surface;

12. a heat-conducting adhesive layer;

200. a battery pack.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

Example 1

The utility model provides a battery module 100, and the battery module 100 is suitable for the battery field, namely a bus bar of a battery; the battery module 100 includes a bus bar 11 and a temperature sensing unit 10 for detecting the temperature of the bus bar 11, a clamping structure 110 is provided on the bus bar 11, and the temperature sensing unit 10 is connected with the clamping structure 110 in a clamping manner.

In a specific example of this embodiment, the clamping structure 110 is a clamping groove disposed on the bus bar 11, the temperature sensing unit 10 is clamped in the clamping groove, and the outer peripheral surface of the temperature sensing unit 10 is attached to the inner surface of the clamping groove, so as to limit the temperature sensing unit 10 in the clamping groove, and thus, the temperature of the bus bar 11 can be accurately measured by the temperature sensing unit 10, and the temperature of the battery can be measured.

In another specific example of this embodiment, the clamping structure 110 is a clamping hole 1101 formed in the bus bar 11, the clamping hole 1101 is a through hole structure, the temperature sensing unit 10 is clamped in the clamping hole 1101, and an outer peripheral surface of the temperature sensing unit 10 is attached to an inner surface of the clamping hole 1101, so as to limit the temperature sensing unit 10 in the clamping hole 1101, thereby realizing accurate temperature measurement of the bus bar 11 by the temperature sensing unit 10, and further realizing temperature measurement of the battery.

In this embodiment, the temperature sensing unit 10 includes but is not limited to the temperature sensor 101, and of course, the temperature sensing unit 10 may also be the temperature sensor 101 coated with a package having a heat conduction function, as long as it is ensured that the temperature sensor 101 can be clamped in the clamping structure and can detect the temperature on the bus bar 11.

Example 2

In this embodiment, the same parts as those in embodiment 1 are not described again, and refer to embodiment 1 specifically, and only the differences will be described here.

In this embodiment, the clamping sleeve 103 with a heat conducting function is sleeved on the outer peripheral surface of the temperature sensing unit 10, and the outer peripheral surface of the clamping sleeve 103 is tightly attached to the inner wall surface of the clamping structure 110 (the clamping groove or the clamping hole) so as to limit the temperature sensing unit 10 in the clamping groove or the clamping hole, thereby realizing accurate temperature measurement of the bus bar 11 by the temperature sensing unit 10 and further realizing temperature measurement of the battery.

Example 3

In this embodiment, the same parts as those in embodiment 1 are not described again, and refer to embodiment 1 specifically, and only the differences will be described here. In this embodiment, the temperature sensing unit 10 is externally covered with a heat conductive adhesive layer 12, and an outer surface of the heat conductive adhesive layer 12 is tightly attached to an inner wall surface of the clamping structure 110 (the clamping groove or the clamping hole 1101), that is, the temperature sensing unit 10 is accommodated in a closed space formed by the heat conductive adhesive layer 12 and clamped and fixed on an inner wall of the clamping structure 110, so as to measure the temperature of the battery by the temperature sensing unit 10.

Example 4

In this embodiment, as shown in fig. 1 to 3, the temperature sensing unit 10 includes a temperature sensor 101, a circuit board 104, and an FFC (Flexible Flat Cable) collection line 102, where one end of the FFC collection line 102 and the temperature sensor 101 are fixed on the circuit board 104 by soldering, a solder joint adopts a processing manner of sealing glue to prevent oxidation, so as to ensure the reliability of connection between the temperature sensor 101 and the FFC collection line 102 and the circuit board 104, and the temperature sensor 101 and the FFC collection line 102 are electrically connected to the circuit board 104, that is, the temperature sensor 101 is electrically connected to the FFC collection line 102 through a metal wire on the circuit board 104, and such a connection manner solves the problem that the temperature sensor 101 and the FFC collection line 102 are not welded firmly;

the clamping sleeve 103 is sleeved on the outer peripheral surface of the temperature sensor 101, namely, the temperature sensor 101 and the clamping sleeve 103 are clamped and connected in an interference fit mode, the outer peripheral surface of the clamping sleeve 103 is tightly attached to the inner wall surface of the clamping structure 110, namely, the clamping sleeve 103 and the clamping structure 110 (a clamping groove or a clamping hole) are clamped and connected in an interference fit mode, so that the temperature of the busbar 11 is transmitted to the temperature sensor 101 through the clamping sleeve 103, and the temperature measurement of the busbar 11 is realized.

Specifically, the Temperature sensor 101 may be, but is not limited to, an NTC (Negative Temperature Coefficient) thermistor, where the NTC thermistor decreases in an exponential relationship with a Temperature rise, that is, when the NTC thermistor detects a Temperature rise of the target to be measured, the resistance of the NTC thermistor decreases with the Temperature rise and is correspondingly converted into an electrical signal to realize real-time detection of the Temperature of the target, and of course, the Temperature sensor 101 may also be another sensor capable of detecting the Temperature of the busbar 11; the temperature sensing unit 10 includes two FFC collection wires 102 arranged at intervals, the other ends of the two FFC collection wires 102 extend out of the circuit board 104, the other ends of the FFC collection wires 102 are coated with an insulating film 106, the other ends of the FFC collection wires 102 are configured to be electrically connected with a data receiving device, and a certain length of the FFC collection wires 102 can be reserved, so that when the temperature sensor 101 fails, the FFC collection wires 102 can be cut off and the failed temperature sensor 101 can be removed, and then the reserved FFC collection wires 102 are reconnected to the replaced circuit board 104 with the temperature sensor 101 welded thereon in a soldering manner, so that the FFC collection wires 102 are electrically connected with a new temperature sensor 101.

In a specific example of this embodiment, as shown in fig. 1 and fig. 2, the clamping structure 110 is a clamping hole 1101, the bus bar 11 has a first surface 112 and a second surface 113 that are oppositely disposed, the clamping hole 1101 penetrates through the first surface 112 and the second surface 113 of the bus bar 11, the circuit board 104 is covered at one end of the clamping hole 1101, that is, the circuit board 104 is covered at one end of the clamping hole 1101 located at the first surface 112 of the bus bar 11, the clamping sleeve 103 is connected with the circuit board 104 and fixed on the circuit board 104, the other end of the clamping hole is covered with a thermal conductive adhesive layer 12, that is, one end of the clamping hole 1101 located at the second surface 113 of the bus bar 11 is covered with a thermal conductive adhesive layer 12, and an edge of the thermal conductive adhesive layer 12 covers an outer edge of the clamping hole 1101 and covers the temperature sensor 101, the clamping sleeve 103 and the temperature sensor 101 are both connected with the thermal conductive adhesive layer 12, on one hand, the thermal conductive adhesive layer 12 and the circuit board 104 can form a closed space, in order to seal temperature sensor 101 in the confined space to avoid temperature sensor 101's temperature measurement precision to receive the influence of external environment change, on the other hand, thermal conductive adhesive layer 12 can increase the joint strength between temperature sensing unit 10 and the busbar 11, makes the connection between temperature sensing unit 10 and the busbar 11 more reliable.

In a specific example of the present embodiment, a surface of the thermal conductive adhesive layer 12 facing the temperature sensor 101 fills a gap between the card hole 1101 and the temperature sensor 101, so that the temperature of the bus bar 11 is more accurately transmitted to the temperature sensor 101, and more accurate temperature measurement is achieved.

In a specific example of the embodiment, as shown in fig. 1, a cross section of the clamping hole 1101 is rectangular, the clamping sleeve 103 is a rectangular frame adapted to the clamping hole 1101, and a height of the clamping sleeve 103 is greater than a height of the temperature sensor 101 in a direction from the first surface 112 to the second surface 113, so as to protect the temperature sensor 101 by the clamping sleeve 103, that is, prevent stress extrusion from damaging the temperature sensor 101 in the direction from the first surface 112 to the second surface 113 and/or from the second surface 113 to the first surface 112, so that the clamping sleeve 103 plays a role of protecting the temperature sensor 101, so as to prevent an external force from damaging the temperature sensor 101.

Of course, the height of the bayonet sleeve 103 in the direction along the first surface 112 to the second surface 113 may also be less than or equal to the height of the temperature sensor 101.

In this embodiment, the material of the clamping sleeve 103 is preferably, but not limited to, epoxy resin, and of course, other materials with a certain supporting function may be selected; the shape of the cross section of the card hole 1101 is not limited to the square shape shown in the embodiment, and may be set to other shapes, such as but not limited to a circle, a triangle, or a trapezoid, etc., as required; the above method only needs to satisfy the requirement that the temperature sensor 101 electrically connected to the circuit board 104 can be accommodated in the card hole 1101 to measure the temperature and facilitate the replacement of the temperature sensor 101; the shape of the clamping sleeve 103 is not limited to the rectangular frame structure, as long as the clamping fit with the clamping hole 1101 is satisfied.

In an example of the embodiment, as shown in fig. 2 and fig. 3, a limiting portion 111 is disposed on the bus bar 11, a limiting member 1041 matched with the limiting portion 111 is disposed on the circuit board 104, the limiting portion 111 is detachably connected to the limiting member 1041, specifically, the limiting portion 111 is a limiting groove disposed on the bus bar 11, two opposite side surfaces of the circuit board 104 are respectively provided with a limiting member 1041, the two limiting members 1041 are symmetrically disposed, so that the circuit board 104 is substantially in a T-shaped structure, and the circuit board 104 is not easily moved relative to the bus bar 11 through the limiting cooperation between the limiting member 1041 and the limiting portion 111, thereby reducing a risk that the temperature sensing unit 10 falls off from the bus bar 11.

It should be noted that the limiting portion may be a limiting groove directly formed on the bus bar 11, a limiting protrusion connected to the bus bar 11, a limiting groove formed on the limiting protrusion, or a limiting claw connected to the bus bar 11, and is not described herein again.

The circuit board 104 is not limited to the T-shaped structure shown in the embodiment, and may have other shapes as long as the circuit board 104 can be engaged with the bus bar 11.

Certainly, the limiting element 1041 and the limiting portion 111 are not limited to the above structure, and when in use, corresponding adjustment may be performed according to factors such as actual processing procedure, assembly procedure, cost, and the like, as long as it is ensured that the circuit board 104 can be clamped and fixed on the busbar 11, for example, but not limited to, a groove, a protrusion, or an elastic claw, etc. similar to the limiting portion 111 in function are provided on the busbar 11, and correspondingly, the limiting element 1041 on the circuit board 104 is configured to be matched with the groove, the protrusion, or the elastic claw, etc. in structure; of course, the number and the arrangement positions of the limiting parts 111 and the limiting members 1041 adapted thereto may also be adjusted appropriately according to actual needs.

In some embodiments, the circuit board 104 may also be bonded to the bus bar 11 in a manner that facilitates manufacturing of the bus bar 11.

In order to solve the above problem, in the present embodiment, as shown in fig. 2 and 4, a backing plate 105 is connected to a surface of the circuit board 104 facing away from the bus bar 11, the backing plate 105 is substantially a flat plate, the backing plate 105 is configured to be clamped between the bus bar 11 and the Battery to support the circuit board 104, so that in actual use, the circuit board 104 can well seal the card hole 1101, so that the detection accuracy of the temperature sensor 101 is ensured.

In some embodiments, the pad 105 is preferably made of foam having elasticity and certain hardness, but other insulating materials having a supporting function may be used.

Example 5

As shown in fig. 5 and 6, the present invention further provides a battery pack 200, which includes the battery module 100 according to embodiment 4, wherein the bus bar 11 of the battery module 100 is detachably connected to a terminal of a battery, the temperature sensing unit 10 of the battery module 100 can obtain the temperature of the battery pack 200 by detecting the temperature of the bus bar 11, and the battery pack 200 has the above battery module, so that the risk of falling off of the temperature sensing unit 10 after long-time use is effectively reduced, and the reliability of the use of the temperature sensing unit 10 is improved, so that the temperature of the battery pack 200 can be timely and accurately measured, and the battery pack 200 has the advantages of stable performance, safe use, longer service life, and the like.

It should be noted that: the battery module 100 in this embodiment may also be any of the battery modules described in embodiments 1 to 3 above.

In summary, according to the battery module of the present invention, the temperature sensing unit is directly connected to the clamping structure of the bus bar in a clamping manner, so that the stability of connection between the temperature sensing unit and the detected bus bar is increased, the risk of falling off of the temperature sensing unit after long-time use is reduced, and the reliability of use of the temperature sensing unit is improved.

According to the battery module, the temperature sensor is limited on the bus bar through the circuit board, so that the connection between the temperature sensing unit and the bus bar is more stable, and the temperature measuring accuracy of the temperature sensing unit is ensured.

According to the battery module, the temperature sensor is arranged in the closed space formed by enclosing the circuit board, the inner peripheral surface of the clamping structure and the heat-conducting adhesive layer, so that the temperature sensor is not influenced by the external environment in the use process, and the accuracy of detecting the temperature of the busbar is ensured.

According to the battery module, the temperature sensor can be effectively protected in a clamping sleeve manner sleeved outside the temperature sensor, so that the service life of the temperature sensor is prolonged.

The battery pack provided by the utility model is configured with the battery module, so that the falling risk of the temperature sensing unit after long-time use is effectively reduced, and the use reliability of the temperature sensing unit is improved, so that the temperature of the battery module can be timely and accurately measured, and the battery pack has the advantages of stable performance, safety in use, longer service life and the like.

In the description of the present application, it should be noted that the terms "inside" and "outside" and the like indicate orientations or positional relationships based on an operation state of the present application, and are only used for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the term "connected" and the like are to be interpreted broadly unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. The utility model provides a battery module, its characterized in that, battery module includes the busbar and is used for detecting the temperature-sensing unit of the temperature of busbar, be equipped with the joint structure on the busbar, the temperature-sensing unit with joint structure joint is connected.

2. The battery module of claim 1, wherein the snap-fit structure is a snap-fit groove or a snap-fit hole disposed on the bus bar.

3. The battery module according to claim 2, wherein a clamping sleeve is sleeved on an outer peripheral surface of the temperature sensing unit, and an outer peripheral surface of the clamping sleeve is attached to an inner wall surface of the clamping groove or the clamping hole.

4. The battery module according to claim 2, wherein the temperature sensing unit is externally coated with a heat conductive adhesive layer, and an outer surface of the heat conductive adhesive layer is closely attached to an inner wall surface of the locking groove or the locking hole.

5. The battery module according to claim 2, wherein the temperature sensing unit comprises a temperature sensor, a circuit board, and an FFC collecting wire, the temperature sensor and the FFC collecting wire are connected to the circuit board, and the temperature sensor is electrically connected to the FFC collecting wire.

6. The battery module according to claim 5, wherein a clamping sleeve is sleeved on an outer peripheral surface of the temperature sensor, an outer peripheral surface of the clamping sleeve is attached to an inner wall surface of the clamping groove or the clamping hole, and the clamping sleeve is connected with the circuit board.

7. The battery module according to claim 6, wherein the clamping structure is a clamping hole, the circuit board cover is disposed at one end of the clamping hole, a heat-conducting adhesive layer covers the other end of the clamping hole, and the clamping sleeve and the temperature sensor are connected with the heat-conducting adhesive layer.

8. The battery module as set forth in claim 5, wherein the bus bar is provided with a position-limiting portion, the circuit board is provided with a position-limiting member engaged with the position-limiting portion, and the position-limiting portion is detachably connected to the position-limiting member.

9. The battery module according to any one of claims 5 to 8, wherein a backing plate is attached to a surface of the circuit board facing away from the bus bar.

10. A battery pack, characterized in that the battery pack comprises the battery module according to any one of claims 1 to 9.