NTC acquisition battery structure

Abstract

The utility model relates to an NTC (Negative Temperature Coefficient) acquisition battery structure which comprises a cover plate, a box body, a battery cell module and an NTC acquisition plate, the battery cell module is arranged in the box body; the NTC acquisition board is arranged at the top of the battery cell module, and the NTC acquisition board is matched with the battery cell module; the cover plate covers the top of the box body; the NTC acquisition board comprises a fixing part arranged on one side of the battery cell module and a plurality of connecting parts arranged at the top of the battery cell module, one end of each connecting part is connected with the fixing part, and the connecting parts and the fixing part are integrally formed; and the plurality of connecting parts are arranged in parallel. By means of the structure, time delay of nickel sheet conduction can be avoided, the temperature of the surface of the aluminum bar can be effectively collected, the connection reliability of laser welding can be judged through the temperature, the heat dissipation speed is high, the heat dissipation effect is good, economy, safety and practicability are achieved, and more effective temperature control management can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a kind of NTC collection battery structure. BACKGROUND

[0002] With the in-depth development of new energy industries such as energy storage, photovoltaic and wind power, various new energies are integrated with each other to form complementary energy stations.

[0003] From the current market, the conventional NTC (Negative Temperature Coefficient, thermistor) is fixed to the surface of the battery cell by wire harness or locked to the surface of the aluminum bar by screw, which cannot accurately collect the temperature of the battery cell. There is also a risk of inaccurate collection when it is not properly attached. The flexible printed circuit (FPC) scheme is to weld the nickel sheet to the aluminum bar through a nickel sheet carrier, and then conduct heat to the NTC through the nickel sheet. Due to the conduction of NTC through the nickel sheet, there is a large temperature rise delay during high-rate discharge of the battery cell, which affects the logical judgment of CBMS and causes certain risks in long-term high-temperature use of the battery cell, which also reduces the service life of the battery cell to some extent. SUMMARY

[0004] Therefore, the utility model provides a kind of NTC collection battery structure, to solve the temperature delay of existing NTC collection mode, cannot accurately collect the temperature of battery cell, make the battery cell long-term high-temperature use exist security risk, easily reduce the service life of battery cell and other problems.

[0005] To achieve the above purpose, the utility model embodiment proposes the following technical scheme: a kind of NTC collection battery structure, including cover plate, box, battery cell module and NTC collection plate;The battery cell module is arranged in the box;The NTC collection plate is arranged at the top of the battery cell module, and the NTC collection plate is matched with the battery cell module;The cover plate is covered on the top of the box;

[0006] The NTC collection plate includes a fixed part arranged on one side of the battery cell module and a plurality of connecting parts arranged on the top of the battery cell module, one end of each connecting part is connected with the fixed part, and the connecting part is integrally formed with the fixed part. A plurality of connecting parts are arranged in parallel with each other.

[0007] As a preferred embodiment, the fixed part is a "T"-shaped fixed part, including an integrally arranged parallel part and a vertical part;The parallel part is connected with each connecting part;The vertical part is provided with a connecting terminal on the side away from the battery cell module.

[0008] As a preferred implementation, the plurality of connection portions are equidistantly arranged; each of the connection portions is provided with a plurality of collection portions on both sides, and the collection portions are connected with the corresponding battery cell modules.

[0009] As a preferred implementation, the collection portions are integrally formed with the connection portions; and the collection portions are correspondingly arranged with the battery cell modules.

[0010] As a preferred implementation, an aluminum row is arranged between the connection portions and the battery cell modules, the connection portions are arranged in abutment with the aluminum row, and the connection portions are adapted to the aluminum row.

[0011] As a preferred implementation, the battery cell module includes a plurality of module units arranged side by side; the module units are one-to-one correspondingly arranged with the connection portions; and the connection portions are arranged at the center of the top of the module units.

[0012] As a preferred implementation, a first heng-shaped spacer is arranged between adjacent module units, and the first heng-shaped spacer is in abutment with the module units and the box body respectively; the first heng-shaped spacer includes a first heng-shaped mica sheet and a first phase-change heat dissipation sheet arranged in abutment, and the first heng-shaped mica sheet is circumferentially arranged on the outside of the first phase-change heat dissipation sheet.

[0013] As a preferred implementation, the length of the first heng-shaped mica sheet is the same as the length of the module unit, and the height of the first heng-shaped mica sheet is the same as the height of the module unit.

[0014] As a preferred implementation, each of the module units includes a plurality of battery cell monomers arranged in parallel; and a second heng-shaped spacer is arranged between adjacent battery cell monomers in the same module unit.

[0015] As a preferred implementation, a through hole adapted to the explosion-proof valve of the battery cell monomer is arranged on the connection portion in the same module unit, and the through hole is one-to-one correspondingly arranged with the battery cell monomer.

[0016] As a preferred implementation, each of the second heng-shaped spacers is arranged in abutment with the adjacent first heng-shaped spacers; and each of the second heng-shaped spacers is arranged in abutment with the adjacent battery cell monomers.

[0017] As a preferred implementation, the length of the second heng-shaped spacer is the same as the length of the battery cell monomer, and the height of the second heng-shaped spacer is the same as the height of the battery cell monomer.

[0018] As a preferred implementation, the second back-shaped spacer comprises a second back-shaped mica sheet and a second phase-change heat sink arranged in abutment, and the second back-shaped mica sheet is arranged circumferentially outside the second phase-change heat sink.

[0019] The NTC acquisition battery structure has the advantages that: the structure can avoid the delay of nickel sheet conduction, can effectively collect the temperature of the surface of the aluminum row, can determine the connection reliability of laser welding through the temperature, solves the problem that the middle single cell cannot be collected by NTC after the module is grouped, can effectively collect the temperature of the middle single cell of the module, and realizes more effective temperature control management. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0021] Figure 1 It is an overall structure schematic view of the NTC acquisition battery structure of the embodiment of the present application.

[0022] Figure 2 It is a partial internal structure schematic view of the NTC acquisition battery structure. Figure 1

[0023] Figure 3 It is a structure schematic view of the NTC acquisition plate. Figure 2

[0024] Figure 4 It is a structure schematic view of the NTC acquisition plate and the aluminum row of the NTC acquisition battery structure of another embodiment.

[0025] The implementation, functional characteristics and advantages of the present application will be further described with reference to the drawings. DETAILED DESCRIPTION

[0026] ​​The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0027] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, top, bottom, and the like), the directional indications are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0028] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element.

[0030] In addition, if the embodiments of the present application involve "first", "second" and the like, the "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0031] Specifically, as Figures 1 to 3As shown in the utility model embodiment, the technical scheme is as follows: an NTC collection battery structure, comprising a cover plate 10, a box body 20, a battery cell module 30 and an NTC collection plate 40; the battery cell module 30 is arranged in the box body 20; the NTC collection plate 40 is arranged on the top of the battery cell module 30, and the NTC collection plate 40 is arranged in adaptation with the battery cell module 30; the cover plate 10 is covered on the top of the box body 20.

[0032] The NTC collection plate 40 comprises a fixing portion 41 arranged on one side of the battery cell module 30 and a plurality of connecting portions 42 arranged on the top of the battery cell module 30, one end of each connecting portion 42 is connected with the fixing portion 41, and the connecting portion 42 is integrally formed with the fixing portion 41; the plurality of connecting portions 42 are arranged in parallel with each other.

[0033] In this way, the NTC collection plate is directly attached to the surface of the battery cell, solving the problem that the middle battery cell cannot be collected by the NTC after the module is grouped; meanwhile, the nickel sheet conduction and the glue fixation to the surface of the battery cell are avoided, solving the temperature delay problem, effectively collecting the temperature of the middle battery cell in the module, and monitoring the real-time temperature of the battery cell, more effectively performing temperature control management.

[0034] As a preferred embodiment, the fixing portion 41 is a "T"-shaped fixing portion, comprising a parallel portion 411 and a vertical portion 412 arranged integrally; the parallel portion 411 is connected with each connecting portion 42; the vertical portion 412 is provided with a connecting terminal 413 away from one side of the battery cell module 30.

[0035] As a preferred embodiment, the plurality of connecting portions 42 are arranged at equal intervals; each connecting portion 42 is provided with a plurality of collection portions 421 on both sides; the collection portion 421 is connected with the adaptively matched battery cell module 30.

[0036] As a preferred embodiment, the collection portion 421 is integrally formed with the connecting portion 42; the collection portion 421 is correspondingly arranged with the battery cell module 30.

[0037] As a preferred embodiment, as shown in the utility model embodiment, Figure 4 As shown in another embodiment, an aluminum row 50 is arranged between the connecting portion 42 and the battery cell module 30, the connecting portion 42 is attached to the aluminum row 50, and the connecting portion 42 is adaptively arranged with the aluminum row 50. In this way, the NTC collection plate is directly attached to the surface of the aluminum row, effectively collecting the temperature of the surface of the aluminum row, and judging the connection reliability of laser welding through the temperature.

[0038] As a preferred implementation, the battery cell module 30 comprises a plurality of module units 31 arranged in parallel; the module units 31 are arranged one-to-one with the connecting portions 42; the connecting portions 42 are arranged at the center of the top of the module units 31.

[0039] Through the structure of the present application, the delay of the nickel sheet conduction can be avoided, the temperature of the aluminum row surface can be effectively collected, the connection reliability of the laser welding can be determined through the temperature, the problem that the middle battery cell monomer cannot be collected by the NTC after the module is grouped can be solved, the temperature of the middle battery cell monomer in the module can be effectively collected, and more effective temperature control management can be realized.

[0040] As a preferred implementation, first back-shaped spacers 60 are arranged between adjacent module units 31, and the first back-shaped spacers 60 are in abutment with the module units 31 and the box 20, respectively; the first back-shaped spacers 60 comprise first back-shaped mica sheets 61 and first phase-change heat dissipation sheets 62 arranged in abutment, and the first back-shaped mica sheets 61 are circumferentially arranged outside the first phase-change heat dissipation sheets 62.

[0041] As a preferred implementation, the length of the first back-shaped mica sheet 61 is the same as the length of the module unit 31, and the height of the first back-shaped mica sheet 61 is the same as the height of the module unit 31. In this way, the insulation property can be effectively guaranteed, and the rapid cooling of the module unit can be realized. The back-shaped mica sheet plays an insulation role; when the temperature of the module unit during the discharging process reaches 37℃, the phase-change heat dissipation sheet starts to absorb heat from the module unit, slows down the temperature rise of the module unit during the high-rate discharging process, and controls the temperature of the module unit within 50℃.

[0042] As a preferred implementation, each module unit 31 comprises a plurality of battery cell monomers 311 arranged in parallel; in the same module unit 31, second back-shaped spacers 70 are arranged between adjacent battery cell monomers 311.

[0043] As a preferred implementation, in the same module unit 31, the connecting portion 42 is provided with a through hole 422 matched with the explosion-proof valve of the battery cell monomer 311, and the through hole 422 is arranged one-to-one with the battery cell monomer 311. In this way, while guaranteeing better temperature control management, the battery cell monomers can be arranged according to the conventional setting to realize normal operation.

[0044] As a preferred implementation, each of the second heng-shaped partitions 70 is arranged in abutment with the adjacent first heng-shaped partition 60, and each of the second heng-shaped partitions 70 is arranged in abutment with the adjacent battery cell 311. In this way, the insulation can be effectively ensured, and the rapid cooling of the battery cell (especially the battery cell in the middle of the module) can be further ensured.

[0045] As a preferred implementation, the length of the second heng-shaped partition 70 is the same as the length of the battery cell 311, and the height of the second heng-shaped partition 70 is the same as the height of the battery cell 311.

[0046] As a preferred implementation, the second heng-shaped partition 70 comprises a second heng-shaped mica sheet 71 and a second phase-change heat sink 72 arranged in abutment, and the second heng-shaped mica sheet 71 is circumferentially arranged outside the second phase-change heat sink 72. The heng-shaped mica sheet plays an insulating role, and when the temperature of the battery cell during discharge reaches 37℃, the phase-change heat sink starts to absorb heat from the battery cell, slows down the temperature rise of the battery cell during high-rate discharge, and controls the temperature of the battery cell within 50℃.

[0047] By arranging the first heng-shaped partition and the second heng-shaped partition, a good heat dissipation network is formed for the entire battery box structure, which can better dissipate heat from each battery cell (especially the battery cell in the middle of the module), has a fast heat dissipation speed and a good heat dissipation effect. In the case that the module space is compact and no effective air duct is formed, the battery cell (especially the battery cell in the middle of the module) can be rapidly cooled, thereby effectively prolonging the service life of the battery cell.

[0048] The utility model discloses simple structure, good heat dissipation effect, convenient to dismount, easy maintenance, better stability, economic safe and practical, can satisfy the need of actual use well.

[0049] In the description of the present specification, the description of the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0050] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not only contain one independent technical solution, and the description of the specification is only for the sake of clarity. The skilled person should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by the skilled person.

[0051] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, as described in the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. An NTC data acquisition battery structure, characterized in that, The device includes a cover plate, a housing, a battery cell module, and an NTC acquisition board; the battery cell module is disposed inside the housing; the NTC acquisition board is disposed on top of the battery cell module and is adapted to fit the battery cell module; the cover plate covers the top of the housing. The NTC acquisition board includes a fixing part disposed on one side of the battery cell module and a plurality of connecting parts disposed on the top of the battery cell module. One end of each connecting part is connected to the fixing part, and the connecting part and the fixing part are integrally formed. The plurality of connecting parts are arranged parallel to each other.

2. The NTC data acquisition battery structure according to claim 1, characterized in that, The fixing part is a T-shaped fixing part, including an integrally formed parallel part and a vertical part; the parallel part is connected to each of the connecting parts; the vertical part has a connecting terminal on the side away from the battery cell module.

3. The NTC data acquisition battery structure according to claim 1, characterized in that, Multiple connecting parts are equally spaced; each connecting part has multiple acquisition units on both sides, and the acquisition units are connected to the corresponding battery cell module.

4. The NTC data acquisition battery structure according to claim 3, characterized in that, The acquisition unit and the connection unit are integrally formed; the acquisition unit is correspondingly arranged with the battery cell module.

5. The NTC data acquisition battery structure according to claim 1, characterized in that, An aluminum busbar is provided between the connecting part and the battery cell module. The connecting part is fitted to the aluminum busbar and is adapted to the aluminum busbar.

6. The NTC data acquisition battery structure according to claim 1, characterized in that, The battery cell module includes multiple module units arranged in parallel; each module unit is correspondingly arranged with a connecting part; the connecting part is located at the center of the top of each module unit.

7. The NTC data acquisition battery structure according to claim 6, characterized in that, A first U-shaped partition is provided between adjacent module units, and the first U-shaped partition abuts against the module unit and the housing respectively; the first U-shaped partition includes a first U-shaped mica sheet and a first phase change heat sink that abut against each other, and the first U-shaped mica sheet is circumferentially disposed on the outside of the first phase change heat sink.

8. The NTC data acquisition battery structure according to claim 7, characterized in that, Each module unit includes several parallel battery cells; within the same module unit, a second U-shaped spacer is provided between adjacent battery cells.

9. The NTC data acquisition battery structure according to claim 8, characterized in that, In the same module unit, the connecting part is provided with a through hole adapted to the explosion-proof valve of the battery cell, and the through hole is provided one-to-one with the battery cell.

10. The NTC data acquisition battery structure according to claim 8, characterized in that, The length of the first square-shaped mica sheet is the same as the length of the module unit, and the height of the first square-shaped mica sheet is the same as the height of the module unit; Each of the second U-shaped spacers is disposed in contact with the adjacent first U-shaped spacer; each of the second U-shaped spacers is disposed in contact with the adjacent battery cell. The length of the second U-shaped separator is the same as the length of the battery cell, and the height of the second U-shaped separator is the same as the height of the battery cell. The second U-shaped partition includes a second U-shaped mica sheet and a second phase change heat sink that are abutted together, with the second U-shaped mica sheet circumferentially disposed on the outer side of the second phase change heat sink.

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