CN218896696U - Battery and battery pack - Google Patents

Battery and battery pack Download PDF

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Publication number
CN218896696U
CN218896696U CN202223368727.4U CN202223368727U CN218896696U CN 218896696 U CN218896696 U CN 218896696U CN 202223368727 U CN202223368727 U CN 202223368727U CN 218896696 U CN218896696 U CN 218896696U
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CN
China
Prior art keywords
battery
hole
explosion
top plate
proof valve
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Active
Application number
CN202223368727.4U
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Chinese (zh)
Inventor
孙倩倩
齐彬伟
杜国艺
张璐璐
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China Lithium Battery Technology Co Ltd
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China Lithium Battery Technology Co Ltd
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Application filed by China Lithium Battery Technology Co Ltd filed Critical China Lithium Battery Technology Co Ltd
Priority to CN202223368727.4U priority Critical patent/CN218896696U/en
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Publication of CN218896696U publication Critical patent/CN218896696U/en
Priority to DE202023102254.5U priority patent/DE202023102254U1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery pack, wherein the battery comprises: a battery case; the pole assembly is arranged on the battery shell; the battery pack comprises an insulating top plate, wherein the insulating top plate is arranged on the surface of a battery shell, the surface surrounded by the peripheral edge of the insulating top plate is S1, a through hole exposing the battery shell is formed in the insulating top plate, the area of the through hole is S2, S2/S1 is less than or equal to 5%, and is less than or equal to 40%, the insulating top plate can effectively realize insulating protection of the battery shell, timely heat dissipation of the battery shell can be realized through the through hole, and the electrode assembly is used as a current output end of a battery, so that heat generation of the electrode assembly is large due to large current, and the battery shell is exposed to realize timely heat dissipation of the inside of the battery, so that serious heat generation of the electrode assembly is avoided, internal safety risks of the battery and structures connected with the electrode assembly are fused, and the safe use performance of the battery is improved.

Description

Battery and battery pack
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery and a battery pack.
Background
In the related art, the insulating top plate is generally arranged at the top of the battery, and the heat inside the battery cannot be timely dissipated due to the fact that the insulating top plate is generally poor in heat conductivity coefficient, so that the overall resistance of the battery is large, and the quick charge and safety of the battery are affected.
Disclosure of Invention
The utility model provides a battery and a battery pack, which are used for improving the service performance of the battery.
According to an embodiment of the present utility model, there is provided a battery including:
a battery case;
the pole assembly is arranged on the battery shell;
the insulating top plate is arranged on the surface of the battery shell, provided with the pole assembly, the area surrounded by the peripheral edge of the insulating top plate is S1, the insulating top plate is provided with a through hole exposing the battery shell, and the area of the through hole is S2, and S2/S1 is more than or equal to 5% and less than or equal to 40%.
The battery comprises a battery shell, a pole component and an insulating top plate, wherein the pole component is arranged on the battery shell, the insulating top plate is arranged on the surface of the battery shell, the pole component is arranged on the surface of the battery shell, insulation protection of the battery shell is achieved, the area surrounded by the peripheral edge of the insulating top plate is S1, a through hole exposing the battery shell is arranged on the insulating top plate, the area of the through hole is S2, S2/S1 is less than or equal to 5%, and is less than or equal to 40%, on the basis that insulation protection of the battery shell can be effectively achieved through the insulating top plate, timely heat dissipation of the battery shell can be achieved through the through hole, and particularly, the heat dissipation requirement on the surface of the battery shell arranged by the pole component is particularly important.
According to another embodiment of the present utility model, there is provided a battery pack including the above-described battery.
The battery of the battery pack comprises a battery shell, a pole component and an insulating top plate, wherein the pole component is arranged on the battery shell, the insulating top plate is arranged on the surface of the battery shell, on which the pole component is arranged, insulation protection of the battery shell is achieved, the area surrounded by the peripheral edge of the insulating top plate is S1, through holes exposing the battery shell are arranged on the insulating top plate, the area of the through holes is S2, S2/S1 is less than or equal to 5%, and less than or equal to 40%, on the basis that insulation protection of the battery shell can be effectively achieved through the insulating top plate, timely heat dissipation of the battery shell can be achieved through the through holes, and especially, the surface heat dissipation requirement of the battery shell arranged by the pole component is particularly important.
Drawings
For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.
Wherein:
fig. 1 is a schematic view of a structure of a battery according to a first exemplary embodiment;
fig. 2 is a schematic structural view of a battery according to a second exemplary embodiment;
fig. 3 is a schematic view of a structure of a battery according to a third exemplary embodiment;
fig. 4 is a schematic structural view of a battery according to a fourth exemplary embodiment;
fig. 5 is a schematic view of a structure of a battery pack according to the first exemplary embodiment;
fig. 6 is a schematic structural view of a battery pack according to a second exemplary embodiment;
fig. 7 is a partial schematic structure of a battery pack according to a third exemplary embodiment.
The reference numerals are explained as follows:
10. a battery case; 11. a liquid injection hole; 20. a pole assembly; 30. an insulating top plate; 31. a through hole; 32. an explosion-proof valve through hole; 40. an explosion-proof valve; 50. a conductive bar; 60. a protective structure; 61. an exhaust passage; 70. and a signal acquisition component.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.
Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being "on," "under," or "in" or "out" of another element or feature being "on," "under" or "in" or "out" of the other element or elements, it can be directly connected to the other element or elements, or indirectly connected to the other element or elements via intervening elements.
An embodiment of the present utility model provides a battery, referring to fig. 1 to 4, the battery includes: a battery case 10; a pole assembly 20, the pole assembly 20 being disposed on the battery case 10; the insulating top plate 30, the insulating top plate 30 is arranged on the surface of the battery shell 10, on which the pole assembly 20 is arranged, the area surrounded by the circumferential outer edge of the insulating top plate 30 is S1, the insulating top plate 30 is provided with a through hole 31 exposing the battery shell 10, and the area of the through hole 31 is S2, and S2/S1 is more than or equal to 5% and less than or equal to 40%.
The battery according to one embodiment of the utility model comprises a battery shell 10, a pole assembly 20 and an insulating top plate 30, wherein the pole assembly 20 is arranged on the battery shell 10, the insulating top plate 30 is arranged on the surface of the battery shell 10, which is provided with the pole assembly 20, so that insulation protection of the battery shell 10 is realized, the area surrounded by the circumferential outer edge of the insulating top plate 30 is S1, a through hole 31 exposing the battery shell 10 is arranged on the insulating top plate 30, the area of the through hole 31 is S2, and S2/S1 is less than or equal to 5%, and 40% is less than or equal to 40%, on the basis that insulation protection of the battery shell 10 can be effectively realized by the insulating top plate 30, the timely heat dissipation requirement of the battery shell 10 can be realized through the through hole 31, especially, the surface heat dissipation requirement of the battery shell 10 provided with the pole assembly 20 is important, and the pole assembly 20 is used as a current output end of the battery, so that the heat generation of the pole assembly 20 is large, however, the surface area of the pole assembly 20 is smaller than the area of the battery shell 10, the heat dissipation of the pole assembly 20 is far insufficient, the heat dissipation of the battery shell 10 is realized, the serious heat dissipation of the battery shell 20 is realized, and the internal heat dissipation of the battery assembly is avoided, and the safety of the internal safety and the safety of the battery 20 are also is improved.
It should be noted that, the insulating top plate 30 is disposed on the surface of the battery housing 10 where the pole assembly 20 is disposed, that is, the insulating top plate 30 may at least realize insulation protection on the surface of the battery housing 10 where the pole assembly 20 is disposed, thereby avoiding the battery housing 10 from forming a short circuit with other structures.
The through holes 31 exposing the battery shell 10 are arranged on the insulating top plate 30, and the through holes 31 can be used as heat dissipation holes, namely, the through holes 31 realize the release of the battery shell 10, so that the insulating top plate 30 is prevented from affecting the heat dissipation of the battery shell 10, and the heat dissipation capacity of the battery is improved, and the safe use performance of the battery is improved. As shown in connection with fig. 1 to 3, the surface of the battery case 10 may be exposed through the through-holes 31.
The area of the through hole 31 is too small, so that the battery case 10 cannot be cooled quickly, and the insulation protection performance of the insulation top plate 30 is affected when the area of the through hole 31 is too large, in this embodiment, the area surrounded by the circumferential outer edge of the insulation top plate 30 is S1, the area of the through hole 31 is S2, and S2/S1 is less than or equal to 5% and less than or equal to 40%, so that the battery case 10 can be cooled efficiently, and the insulation top plate 30 can have reliable insulation protection performance.
The surface of the battery case 10 provided with the post assembly 20 generates heat greatly, and therefore, the heat radiation capability of the surface of the battery case 10 provided with the post assembly 20 can be improved by the provision of the through-hole 31, and the insulation performance of the newspaper battery can be improved on the basis of reducing the internal resistance of the battery.
The insulating top plate 30 is provided with a through hole 31 exposing the battery case 10, and this through hole 31 does not include a post through hole exposing the post assembly 20, i.e., the area of the through hole 31 is S2, which is an area where the post through hole needs to be excluded. Further, when the through hole 31 needs to be provided around the explosion-proof valve provided in the battery case 10, the area of the through hole 31 is S2, and the area of the explosion-proof valve needs to be excluded.
The through hole 31 is a through hole penetrating through the thickness direction of the insulating top plate 30, and the through hole 31 may be a through hole provided including a through hole provided inside the insulating top plate 30, as shown in fig. 1 to 3; alternatively, the through hole 31 may be a notch provided at an edge of the insulating top plate 30, as shown in fig. 4.
Excluding through holes on the periphery of the pole column sleeved on the insulating top plate,
the through hole 31 can realize exposing the battery identification portion on the battery shell 10, and the battery identification portion comprises a digital code and/or a two-dimensional code, the two-dimensional code on the battery shell 10 can be used for displaying relevant information of a battery, or the area of the opposite surface of the leakage portion of the battery shell 10 is larger, shielding of the two-dimensional code is avoided, meanwhile, impurities such as more dust deposited on the two-dimensional code in the storage process are convenient to cause shielding of the two-dimensional code, cleaning of the two-dimensional code is convenient, and the through hole 31 can realize exposing other identification portions on the battery shell 10, so that the battery identification portion is not limited.
In one embodiment, S2/S1 is more than or equal to 10% and less than or equal to 30%, so that the area of the through hole 31 can be effectively controlled, the problem that the through hole 31 is too large or too small is avoided, the insulation protection performance of the insulation top plate 30 is further ensured, and the influence of the insulation top plate 30 on the heat dissipation capacity of the battery shell 10 can be reduced.
In one embodiment, the ratio between the area S2 of the through hole 31 and the area S1 surrounded by the circumferential outer edge of the insulating top plate 30 may be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 15%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 25%, 27%, 28%, 29%, 30%, 35%, 36%, 37%, 38%, 39% or 40%, or the like.
In one embodiment, the pole assembly 20 is disposed on the insulating top plate 30 in a penetrating manner so as to protrude from the surface of the insulating top plate 30 facing away from the battery case 10, so that the subsequent connection between the pole assembly 20 and the conductive bars can be conveniently realized, and the grouping efficiency of the batteries is improved.
It should be noted that in some embodiments, it is not excluded that the pole assembly 20 may not protrude from the insulating top plate 30, thereby requiring the conductive strip to pass through the insulating top plate 30 to make connection with the pole assembly 20.
In one embodiment, as shown in fig. 1 to 3, the battery further includes an explosion-proof valve 40, the explosion-proof valve 40 is used to realize explosion protection for the battery, and the explosion-proof valve 40 can be exploded after the internal pressure of the battery reaches a certain height.
In one embodiment, the explosion proof valve 40 may be provided at the surface of the battery case 10 where the post assembly 20 is provided; wherein, be provided with the explosion-proof valve through-hole 32 that exposes explosion-proof valve 40 on the insulating roof 30 to can avoid insulating roof 30 to shelter from explosion-proof valve 40, guarantee explosion-proof valve 40 can normally explode from this, thereby guarantee explosion-proof valve 40 can play the safeguard function to the battery.
In one embodiment, the explosion proof valve 40 may be disposed on a surface of the battery case 10 where the post assembly 20 is not disposed, for example, the explosion proof valve 40 may be disposed on opposite surfaces of the battery case 10 with the post assembly 20.
The explosion-proof valve 40 may be an explosion-proof sheet in the related art, the explosion-proof valve 40 may be welded to the battery case 10, or the explosion-proof valve 40 may be integrally formed with the battery case 10, which is not limited herein.
In one embodiment, as shown in fig. 2 and 3, the through hole 31 is communicated with the explosion-proof valve through hole 32, so that heat concentrated at the explosion-proof valve 40 can also dissipate through the through hole 31, thereby improving the heat dissipation capability of the explosion-proof valve 40 and avoiding the influence of the explosion-proof valve 40 on the explosion-proof performance due to heat concentration.
In one embodiment, as shown in fig. 2 and 3, the through hole 31 is disposed around the explosion-proof valve through hole 32, so that heat at the explosion-proof valve 40 is concentrated, and thus, heat at the explosion-proof valve 40 can be dissipated in time, the explosion-proof valve 40 is prevented from being failed in advance, and the risk of insulation failure is prevented from being caused when the explosion-proof valve is close to the pole assembly 20.
The explosion-proof valve 40 is disposed at a distance from the pole assembly 20, and at this time, the through hole 31 is disposed at a distance from the pole through hole for exposing the pole assembly 20, so that the through hole 31 surrounds the explosion-proof valve through hole 32 to avoid the through hole 31 from being closer to the pole assembly 20.
As shown in fig. 1, the explosion-proof valve through hole 32 may be spaced from the through hole 31, that is, the through hole 31 and the explosion-proof valve through hole 32 may not be in communication.
In one embodiment, the through hole 31 may be a rectangular hole, as shown in fig. 1; alternatively, the walls of the through holes 31 may be rectangular as shown in fig. 2; alternatively, the through hole 31 may be an annular hole, as shown in fig. 3.
In one embodiment, as shown in fig. 2, the battery further includes a liquid injection hole 11, so that the battery can be injected with an electrolyte through the liquid injection hole 11. The filling hole 11 may be sealed by a sealing structure after filling is completed.
In one embodiment, as shown in fig. 2, a liquid injection hole 11 is provided on the battery case 10, and the liquid injection hole 11 is provided on the surface of the battery case 10 where the pole assembly 20 is provided; wherein, the through hole 31 at least partially exposes the liquid injection hole 11, so that it can be ensured that the electrolyte can be injected into the liquid injection hole 11, or the through hole 31 can be used for air tightness detection, so as to ensure the normal use of the battery.
In one embodiment, the through hole 31 exposes a part of the liquid injection hole 11, so that the electrolyte can be injected into the liquid injection hole 11, and the sealing structure in the liquid injection hole 11 can be prevented from being influenced due to excessive exposure of the liquid injection hole 11.
The electrolyte may be injected before the insulating top plate 30 is disposed on the battery case 10, and the battery may have a failure risk during storage, so that the battery needs to be air-tight detected when the battery is shipped or assembled into a group, and the through holes 31 may be used for air-tight detection.
Alternatively, the electrolyte may be injected after the insulating top plate 30 is disposed on the battery case 10. The through holes 31 can be used for electrolyte injection and cell air tightness detection.
The through hole 31 may expose the entire pouring hole 11.
In one embodiment, the injection hole 11 may be provided at a surface of the battery case 10 where the post assembly 20 is not provided, for example, the injection hole 11 may be provided on opposite surfaces of the battery case 10 with the post assembly 20.
In one embodiment, the capacity of the battery is greater than or equal to 80Ah, so that the battery generates more heat in the use process, and heat emission is needed in time, and therefore, heat dissipation of the battery can be realized in time through the through holes 31 arranged on the insulating top plate 30.
In one embodiment, the through hole 31 is located in the middle of the insulating top plate 30, so that not only can the timely heat dissipation of the battery case 10 be ensured, but also the structural damage of the through hole 31 to the insulating top plate 30 can be avoided, thereby ensuring the safe use performance of the battery.
It should be noted that, in some embodiments, it is not excluded that the through holes 31 may intersect the circumferential outer edge of the insulating top plate 30, as shown in fig. 4, the through holes 31 may be plural, and a portion of the through holes 31 may be located in the middle of the insulating top plate 30, and another portion of the through holes 31 may intersect the circumferential outer edge of the insulating top plate 30, that is, form a notch-like structure.
In one embodiment, the through holes 31 may be plural, thereby improving the heat dissipation capability of the battery case 10, and heat dissipation at various positions of the battery case 10 may be achieved, ensuring heat balance of the battery case 10.
As shown in connection with fig. 1, the number of through holes 31 may be two, and an explosion-proof valve through hole 32 may be provided between the two through holes 31, with the two through holes 31 being located between the two pole assemblies 20.
In one embodiment, as shown in fig. 2, the through holes 31 may be one, the through holes 31 may be in communication with the explosion-proof valve through holes 32, further, the through holes 31 may expose the injection hole 11 to be in communication, and the through holes 31 are located between the two pole assemblies 20.
As shown in fig. 3, the through hole 31 may be one, and the through hole 31 may be in communication with the explosion-proof valve through hole 32, and the through hole 31 is located between the two pole assemblies 20.
As shown in fig. 4, the number of through holes 31 may be three, an explosion-proof valve through hole 32 may be provided between two through holes 31, and two through holes 31 may be located between two pole assemblies 20, and the other through hole 31 may be a notch.
In one embodiment, the battery may further include a battery cell, which may be sealed within the battery case 10, and the battery cell may be electrically connected to the post assembly 20, for example, the post assembly 20 may be directly welded to a tab of the battery cell, or the post assembly 20 may be electrically connected to a tab of the battery cell through a tab.
The battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell is a unit formed by winding or laminating a stacked portion including a positive electrode tab, a separator, and a negative electrode tab. When the positive pole piece is the positive pole piece, the negative pole piece is the negative pole piece. Wherein, the polarity of the positive pole piece and the negative pole piece can be interchanged. The positive electrode sheet and the negative electrode sheet are coated with an active material.
In one embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.
The battery can be a laminated battery, so that the battery is not only convenient to group, but also long in length. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a positive pole piece, a negative pole piece opposite to the positive pole piece in electrical property and a diaphragm sheet arranged between the positive pole piece and the negative pole piece, so that a plurality of pairs of positive pole pieces and negative pole pieces are stacked to form the laminated battery cell.
Or, the battery may be a wound battery, that is, the positive electrode piece, the negative electrode piece opposite to the positive electrode piece, and the diaphragm sheet disposed between the positive electrode piece and the negative electrode piece are wound to obtain a wound battery core.
In one embodiment, the battery may be a cylindrical battery. The battery can be a winding type battery, namely, a positive electrode plate, a negative electrode plate opposite to the positive electrode plate in electrical property and a diaphragm arranged between the positive electrode plate and the negative electrode plate are wound to obtain a winding type battery cell.
An embodiment of the present utility model also provides a battery pack including the above battery.
The battery pack according to one embodiment of the utility model comprises a battery, the battery comprises a battery shell 10, a pole assembly 20 and an insulating top plate 30, the pole assembly 20 is arranged on the battery shell 10, the insulating top plate 30 is arranged on the surface of the battery shell 10, the pole assembly 20 is arranged on the surface of the battery shell 10, insulation protection of the battery shell 10 is achieved, the area surrounded by the circumferential outer edge of the insulating top plate 30 is S1, through holes 31 exposing the battery shell 10 are arranged on the insulating top plate 30, the area of the through holes 31 is S2, and 5% is less than or equal to S2/S1 and less than or equal to 40%, on the basis that insulation protection of the battery shell 10 can be effectively achieved by the insulating top plate 30, timely heat dissipation of the battery shell 10 can be achieved through the through holes 31, and particularly, the surface heat dissipation requirement of the battery shell 10 provided by the pole assembly 20 is particularly important, and the large current is led to the fact that the pole assembly 20 serves as a current output end of the battery, however, the surface area of the pole assembly 20 is smaller than the area of the battery shell 10, the through holes 31 are far insufficient, the heat dissipation effect of the battery shell 10 is achieved, and the heat dissipation of the battery assembly 20 is seriously exposed inside the battery shell 10, and the safety of the safety and the safety are avoided.
In one embodiment, as shown in fig. 5 and 6, the battery pack further includes a protection structure 60, and the protection structure 60 is provided with a vent channel 61, and the vent channel 61 is disposed opposite to the explosion-proof valve 40 on the battery case 10, so that after the explosion-proof valve 40 is exploded, the gas inside the battery can be rapidly discharged into the vent channel 61 for discharging, and the problem of heat concentration is avoided.
In one embodiment, the protective structure 60 includes a floor with the explosion proof valve 40 disposed toward the floor so that it is avoided that hot air may impinge on the cabin of the vehicle after the explosion proof valve 40 is exploded, thereby avoiding heat-induced safety issues.
In one embodiment, as shown in fig. 6, the battery pack further includes a conductive bar 50, the conductive bar 50 being connected to the pole assembly 20; the orthographic projection of the conductive bar 50 toward the battery case 10 is at least partially not overlapped with the explosion-proof valve 40 on the battery case 10, so that the conductive bar 50 is prevented from affecting the heat dissipation in time, and the conductive bar 50 can be prevented from being impacted by the heat dissipated from the through hole 32 of the explosion-proof valve, thereby preventing the heat from triggering the safety performance of the conductive bar 50.
The battery pack may include a plurality of batteries, the post assemblies 20 of the batteries may be disposed toward the guard structure 60, further, the conductive bars 50 may be used to realize series connection or parallel connection between the plurality of batteries, and two post assemblies 20 on one battery may be connected with the conductive bars 50, respectively, as shown in connection with fig. 6.
The specific structural form of the conductive bar 50 is not limited, and the conductive bar 50 may be selected from conductive bars in the related art, so long as it is used to realize series connection or parallel connection of the batteries.
In one embodiment, the ratio of the area of the front projection of the conductive bar 50 toward the battery case 10, which coincides with the explosion-proof valve 40, to the area of the explosion-proof valve 40 is less than or equal to 70%, so that the conductive bar 50 can be prevented from affecting the normal explosion of the explosion-proof valve 40, thereby ensuring that the explosion-proof valve 40 can realize reliable protection of the battery.
When the ratio of the area of the front projection of the conductive bar 50 toward the battery case 10, which coincides with the explosion-proof valve 40, to the area of the explosion-proof valve 40 is too large, the conductive bar 50 may stop the explosion of the explosion-proof valve 40, thereby affecting the safety performance of the battery.
It should be noted that the front projection of the conductive strip 50 toward the battery case 10 and the explosion-proof valve 40 may partially overlap, or the front projection of the conductive strip 50 toward the battery case 10 and the explosion-proof valve 40 may not overlap, so as to ensure that the ratio of the area of the front projection of the conductive strip 50 toward the battery case 10 overlapping the explosion-proof valve 40 to the area of the explosion-proof valve 40 is less than or equal to 70%.
In one embodiment, the battery pack is a battery module or a battery pack.
The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixed a plurality of batteries. The battery may be a cylindrical battery, the battery module may further include a bracket, and the battery may be fixed to the bracket, and in this case, the protection structure 60 may be the bracket.
The battery pack includes a plurality of batteries and a case for securing the plurality of batteries, and the case may include a protective structure 60.
It should be noted that the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.
In one embodiment, as shown in fig. 7, the battery pack further includes a signal acquisition assembly 70, and the signal acquisition assembly 70 is connected to the battery case 10 through the through-hole 31, so that information on the battery case 10 can be acquired.
For example, the battery case 10 may be electrically connected to the post assembly 20, and the signal acquisition assembly 70 may be connected to the battery case 10 through the through hole 31, so as to acquire voltage information on the battery case 10.
Alternatively, the signal acquisition assembly 70 may be connected to the battery case 10 through the through-hole 31, thereby acquiring temperature information on the battery case 10.
In one embodiment, the signal acquisition assembly 70 is connected to different locations of the battery case 10 through a plurality of through holes 31, so that it can be used to acquire temperatures at different locations of the battery case 10, or it can be used to acquire voltage information and temperature information on the battery case 10, respectively, and so on.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (18)

1. A battery, comprising:
a battery case (10);
a pole assembly (20), the pole assembly (20) being disposed on the battery housing (10);
the battery module comprises an insulating top plate (30), wherein the insulating top plate (30) is arranged on the surface of the battery shell (10) where the pole assembly (20) is arranged, the area surrounded by the circumferential outer edge of the insulating top plate (30) is S1, a through hole (31) exposing the battery shell (10) is arranged on the insulating top plate (30), and the area of the through hole (31) is S2, and S2/S1 is more than or equal to 5% and less than or equal to 40%.
2. The battery of claim 1, wherein 10% to 30% S2/S1.
3. The battery according to claim 1, further comprising an explosion-proof valve (40), the explosion-proof valve (40) being provided to a surface of the battery case (10) where the post assembly (20) is provided;
wherein, the insulating top plate (30) is provided with an explosion-proof valve through hole (32) exposing the explosion-proof valve (40).
4. A battery according to claim 3, characterized in that the through hole (31) communicates with the explosion-proof valve through hole (32).
5. The battery according to claim 4, characterized in that the through hole (31) is provided around the explosion-proof valve through hole (32).
6. The battery according to claim 1, wherein a liquid injection hole (11) is provided on the battery case (10), the liquid injection hole (11) being provided on a surface of the battery case (10) on which the pole assembly (20) is provided;
wherein the through hole (31) at least partially exposes the liquid injection hole (11).
7. The battery according to claim 6, wherein the through hole (31) exposes a portion of the liquid injection hole (11).
8. The battery of claim 1, wherein the capacity of the battery is greater than or equal to 80Ah.
9. The battery according to claim 1, characterized in that the through hole (31) is located in the middle of the insulating top plate (30).
10. The battery according to claim 1, wherein the through holes (31) are plural.
11. The battery of claim 1, wherein the battery is a quadrangular type battery.
12. A battery pack comprising the battery according to any one of claims 1 to 11.
13. The battery according to claim 12, further comprising a conductive bar (50), the conductive bar (50) being connected to the pole assembly (20);
wherein the orthographic projection of the conductive bar (50) towards the battery shell (10) is at least partially not overlapped with the explosion-proof valve (40) on the battery shell (10).
14. The battery according to claim 13, characterized in that the ratio of the area of the conductive bar (50) coinciding with the explosion-proof valve (40) towards the orthographic projection of the battery housing (10) to the area of the explosion-proof valve (40) is less than or equal to 70%.
15. The battery pack according to claim 12, further comprising a protective structure (60), wherein a vent passage (61) is provided on the protective structure (60), and the vent passage (61) is disposed opposite to the explosion-proof valve (40) on the battery case (10).
16. The battery according to claim 15, wherein the protective structure (60) comprises a bottom plate, the explosion-proof valve (40) being disposed toward the bottom plate.
17. The battery pack according to claim 12, further comprising a signal acquisition assembly (70), the signal acquisition assembly (70) being connected to the battery housing (10) through the through hole (31).
18. The battery pack according to claim 17, wherein the signal acquisition assembly (70) is connected to different positions of the battery case (10) through a plurality of the through holes (31).
CN202223368727.4U 2022-12-14 2022-12-14 Battery and battery pack Active CN218896696U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202223368727.4U CN218896696U (en) 2022-12-14 2022-12-14 Battery and battery pack
DE202023102254.5U DE202023102254U1 (en) 2022-12-14 2023-04-26 battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223368727.4U CN218896696U (en) 2022-12-14 2022-12-14 Battery and battery pack

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