CN207183396U

CN207183396U - Battery

Info

Publication number: CN207183396U
Application number: CN201720943646.2U
Authority: CN
Inventors: 刘祖超; 宋传涛; 南海洋; 黄伟; 肖质文
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2018-04-03
Anticipated expiration: 2027-07-31

Abstract

Embodiments herein provides a kind of battery used with electrical equipment collocation, and the battery includes：Battery main body, battery main body are provided with the first lug；And breaker, breaker includes the first contact, the second contact and thermal strain element, wherein, first contact is connected between the first lug and thermal strain element, and the second contact includes and the first end of electrical equipment connection and the second end separably contacted with the main body of the first contact.The purpose of the application is to provide a kind of battery, and at least to realize the battery core adstante febre when battery, breaker can cut off or reduce in time electric current, play the protective effect to battery core.

Description

Battery

Technical field

Embodiments herein is related to field of batteries, and more particularly, to a kind of battery.

Background technology

In the current safeguard construction for battery, it can be common that outside batteries connect an overtemperature protection system, Such as breaker, so that electric current is cut off or reduced when battery core temperature anomaly raises, play a part of protecting battery battery core.However, The operating temperature of current breaker generally exist delay, often occur battery temperature extremely rise but breaker it is still motionless The situation of work, thus can not play a part of protecting battery core.

Utility model content

For problem present in correlation technique, the purpose of the application is to provide a kind of safe battery, with least real Now when the battery core adstante febre of battery can cut off or reduce in time electric current, the protective effect to battery core is played.

To achieve the above object, this application provides a kind of battery used with electrical equipment collocation, the battery to include：Electricity Tank main body, battery main body are provided with the first lug；And breaker, breaker include the first contact, the second contact and heat Strain gauge element, wherein, the first contact is connected between the first lug and thermal strain element, and the second contact includes setting with electricity consumption The first end of standby connection and the second end separably contacted with the main body of the first contact.

According to one embodiment of the application, thermal strain element includes thermal strain shell fragment.

According to one embodiment of the application, thermal strain shell fragment is insulating part.

According to one embodiment of the application, thermal strain shell fragment is electric-conductor, and thermal strain element also includes contacting with first The heat conducting element of part connection, heat conducting element and thermal strain shell fragment thermal coupling, thermal strain shell fragment are arranged on heat conducting element and second and connect Between contact element, heat conducting element is insulating part or heat conducting element is temperature-sensitive element.

According to one embodiment of the application, thermal strain element also includes：The heat conducting element being connected with the first contact, leads Thermal element and thermal strain shell fragment thermal coupling, thermal strain shell fragment are arranged between heat conducting element and the second contact.

According to one embodiment of the application, thermal strain shell fragment includes metal clips.

According to one embodiment of the application, temperature-sensitive element includes thermistor.

According to one embodiment of the application, battery also includes transfer electrode lug, wherein, transfer electrode lug is connected to the first contact Between part and the first lug.

According to one embodiment of the application, battery also includes producing lug, wherein, produce lug and be connected to the second contact Between part and electrical equipment.

According to one embodiment of the application, between breaker is located at transfer electrode lug and produces lug, wherein, breaker, Transfer electrode lug is arranged within the same layer with lug is produced.

According to one embodiment of the application, transfer electrode lug, which is located at, to be produced between lug and breaker, wherein, transfer electrode lug It is arranged in breaker in first layer, and produces lug arrangement in the second layer.

According to one embodiment of the application, battery main body is additionally provided with the second lug, wherein, the second lug is set with electricity consumption Standby connection.

According to one embodiment of the application, the first lug and transfer electrode lug of interconnection are located at the second lug and turned Go out between lug.

According to one embodiment of the application, produce lug be located at the second lug and the first lug being connected with each other and Between transfer electrode lug.

According to one embodiment of the application, battery closedtop side is also formed with the top of battery main body, breaker is fixed on On battery closedtop side, or breaker is fixed on the top of battery main body.

The advantageous effects of the application are：

In the battery of the application, the first contact of breaker is connected with lug and thermal strain element respectively so that electricity The heat of core is directly delivered to thermal strain element via the first contact, thus battery core to thermal strain element thermally conductive pathways more Short, loss is less, and thermal strain element can more sense the abnormal heating of battery core in time and cut off or reduce electric current, play to battery core Protective effect.

Brief description of the drawings

, below will be to institute in embodiment in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the application Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings Obtain other accompanying drawings.

Fig. 1 shows the structure of breaker of the prior art and the schematic diagram of thermally conductive pathways；

Fig. 2 a show the structure of the breaker of one embodiment according to the application and the schematic diagram of thermally conductive pathways；

Fig. 2 b show the structure of the breaker of another embodiment according to the application and the schematic diagram of thermally conductive pathways；

Fig. 3 shows the transfer electrode lug of one embodiment according to the application, produces lug and the U-shaped layout of breaker Schematic diagram；

Fig. 4 shows the transfer electrode lug of another embodiment according to the application, produces lug and the F types of breaker layout Schematic diagram；

Fig. 5 shows the schematic diagram of the battery of one embodiment according to the application；

Fig. 6 shows the schematic diagram of the battery of another embodiment according to the application；

Fig. 7 shows the schematic diagram of the battery of another embodiment according to the application；And

Fig. 8 shows the contrast chart of the operating temperature of the thermal induction element of embodiment and comparative example.

Embodiment

The battery of the application is described referring now to accompanying drawing.It should be appreciated that in description below and accompanying drawing in phase The exemplary embodiment answered can be mutually combined, so as to be formed not in other embodiment described herein below；And wherein Section components can omit in different embodiments.In other words, describe not forming the application restriction below.

With reference first to Fig. 2 a to Fig. 6, embodiments herein discloses a kind of battery 30 used with electrical equipment collocation, Battery 30 includes battery main body 32 and breaker 10 in general.Specifically, as shown in figure 5, battery main body 32 is provided with first Lug 34, and as shown in Figure 2 a and 2 b, breaker 10 includes the first contact 14, the second contact 16 and thermal strain element 18.Wherein, the both ends of the first contact 14 are respectively connecting to the first lug 34 and thermal strain element 18, by heat from the first pole Ear 34 is transferred to thermal strain element 18 and plays electric action between the first lug 34 and thermal strain element 18；Second contact The 16 externally connected electrical equipment of first end, the second end then separably contact the main body of the first contact 14, wherein, first The main body of contact 14 refers to the part between two end of the first contact 14, specifically, the first contact 14 main body is between the first lug 34 and thermal strain element 18.

In this respect it is to be noted that above-described " thermal strain element " refers to：In temperature change, shape can occur Shape change, or generation change in size, or occur simultaneously shape and size change element.It is above-described " separably Contact " refers to：Second contact 16 can be selective contacted with based on different condition the first contact 14 or with the first contact 14 separation.For example, when battery core temperature is in the range of normal working temperature, thermal strain element 18 is not up to strain temperature and keeps former During shape, the second contact 16 keeps contacting with the main body of the first contact 14, realizes conducting function therebetween；When battery core mistake Heat, such as battery core temperature exceed normal working temperature, and the heat from battery core is transferred to thermal strain member via the first contact 14 Part 18 and make thermal strain element 18 deform when, the second contact 16 is bounced off the first contact 14 by the thermal strain element 18 of deformation Main body.

Exemplarily, in embodiments herein, as shown in Figure 2 a, thermal strain element 18 may include thermal strain shell fragment 22, thermal strain shell fragment 22 is connected with the thermal coupling of the first contact 14, and elastic deformation can occurs in temperature change in it, with selectivity Ground makes the second contact 16 bounce off the first contact 14.In one embodiment of the application, thermal strain shell fragment 22 is insulating part.

In addition, in embodiments herein, as shown in Figure 2 b, thermal strain element 18 also includes connecting with the first contact 14 The heat conducting element 20 connect, wherein, heat conducting element 20 and the thermal coupling of thermal strain shell fragment 22 are with by the heat from the first contact 14 Thermal strain shell fragment 22 is transferred to, thermal strain shell fragment 22 is arranged between the contact 16 of heat conducting element 20 and second.In the embodiment In, thermal strain shell fragment 22 receives the heat from the first contact 14 by heat conducting element 20, with thermal strain in above-described embodiment For element 22 directly compared with the contact of the first contact 14 is heated, the contact area of thermal strain shell fragment 22 and heat conducting element 20 is bigger, Therefore there is more preferable heat-conducting effect.

When thermal strain shell fragment 22 is insulating part, it is not necessary to it is big to worry that thermal strain shell fragment 22 still exists in circuit after deforming Electric current, heat conducting element 20 can be insulating part, or electric-conductor.

When thermal strain shell fragment 22 is electric-conductor, heat conducting element 20 can be insulating part, now can guarantee that thermal strain shell fragment 22 Circuit is in off state after deformation, ensures cell safety.

When thermal strain shell fragment 22 is electric-conductor, heat conducting element 20 can be temperature-sensitive element.It is herein it should be noted that above-mentioned " temperature-sensitive element " referred to refers to the internal resistance when temperature raises and increased so that the electric current of circuit reduces where temperature-sensitive element；Or Temperature is changed into insulator when raising.Temperature-sensitive element increases in internal resistance and when being changed into insulator, equivalent to making circuit form open circuit, The purpose of protection circuit can be realized.In addition, to realize the effect of long sustaining shell fragment deformation, the temperature-sensitive element can also have Have electric current by when heat production performance.For example, in the other embodiment of above-described embodiment or the application, temperature-sensitive element can wrap Thermistor is included, can be semistor according to one embodiment.

In addition, in the above embodiments of the present application or other embodiment, thermal strain shell fragment 22 may include metal clips or appoint What shell fragment made of other thermal strain materials known in the art, in addition, thermal strain shell fragment 22 can be the bullet of single layer structure Piece, or double-deck or sandwich construction shell fragment, the application not limited to this.When thermal strain shell fragment 22 is metal clips, to protect The insulating properties of thermal strain shell fragment 22 is demonstrate,proved, a layer insulating can be put on the surface of metal clips.

Next, as shown in figure 5, in one embodiment of the application, the top of battery main body 32 is also formed with battery Closedtop side 38, breaker 10 are fixed on such as by adhesive on battery closedtop side 38.Alternatively, in the reality of the application Apply in example, as shown in fig. 7, breaker 10 can be fixed on the top of battery main body 32.Referring additionally to Fig. 2 a and Fig. 2 b, in open circuit The bottom surface of device 10 is provided with opening, and thermal strain element 18 is via the opening and the thermal coupling of battery closedtop side 38, to receive from electricity The heat on pond closedtop side 38.

In the embodiment of the present application as shown in Figure 2 a and 2 b, as shown by arrows, by battery core to the heat in breaker 10 Strain gauge element 18 has two thermally conductive pathways, as indicated by the arrows, respectively the first thermally conductive pathways：The contact 14 of battery core → first → thermal strain element 18；And second thermally conductive pathways：Battery core → battery closedtop 38 → thermal strain of side element 18.Herein, first lead Hot path and the second thermally conductive pathways are only heat substantially bang path, do not limit specific heat transfer path.Such as second In thermally conductive pathways, there can also be glue-line between battery closedtop side 38 and thermal strain element 18, now have in the second thermally conductive pathways Body heat content bang path is battery core → 38 → glue-line of battery closedtop side → thermal strain element 18.

Similarly, in the breaker 10 of the prior art shown in Fig. 1, the second contact 16 of breaker 10 and the first pole Ear 34 connects, and the first contact 14 connection external electric equipment, therefore in the breaker 10 shown in Fig. 1, as arrow indicates, Battery core equally includes two thermally conductive pathways, respectively the first thermally conductive pathways to thermal strain element 18：The contact 16 of battery core → second → the first 14 → thermal strain of contact element 18；And second thermally conductive pathways：Battery core → battery closedtop 38 → thermal strain of side element 18.Wherein, in the first thermally conductive pathways, the second contact 16 needs to cross inside whole breaker 10, then passes through thermal resistance again Larger contact contacts with the first contact 14.Likewise, the first thermally conductive pathways and the second thermally conductive pathways herein are only heat Substantially bang path, specific heat transfer path is not limited.

Comparatively speaking, compared with the first thermally conductive pathways of the prior art breaker 10 shown in Fig. 1, Fig. 2 a and Fig. 2 b institutes First thermally conductive pathways of the application breaker 10 shown are shorter, and loss is less, therefore thermal strain element 18 can more sense in time The abnormal heating of battery core simultaneously cuts off or reduced electric current, plays the protective effect to battery core.

Reference picture 3 and Fig. 4, according in one embodiment of the application, battery 30 also includes transfer electrode lug 24, wherein, turn Lug 24 is connect to be connected between the first contact 14 and the first lug 34, i.e. in the embodiment of the application, the first contact 14 are connected to the first lug 34 by transfer electrode lug 24；Certainly, in the other embodiment of the application, the first contact 14 also may be used The first lug 34 is soldered directly to, the application does not limit to and this.

With further reference to Fig. 3 and Fig. 4, in another embodiment of the application, except transfer electrode lug 24, battery 30 also wraps Include and produce lug 26, wherein, produce lug 26 and be connected between the second contact 16 and electrical equipment, i.e. in being somebody's turn to do for the application In embodiment, the second contact 16 is connected to electrical equipment by producing lug 26.

Generally, it is contemplated that breaker 10 needs to be close to battery closedtop side 38 to set, transfer electrode lug 24 and produce lug 26 with First contact 14 of breaker 10 typically takes the better simply U-shaped layout of structure to be fixedly connected with the second contact 16.Specifically For, as shown in figure 3, in one embodiment of the application, transfer electrode lug 24 and produce lug 26 and be connected to breaker 10 both sides so that between breaker 10 is located at transfer electrode lug 24 and produces lug 26, and breaker 10, the and of transfer electrode lug 24 Produce lug 26 to arrange within the same layer, in such configuration, breaker 10, transfer electrode lug 24 and produce lug 26 and substantially form U-shaped layout shown in Fig. 3.

However, due to the particular/special requirement on some core struetures, F types must be used to be laid out in some cases, specifically, such as Shown in Fig. 4, in F types layout, transfer electrode lug 24 and the same side that lug 26 is respectively positioned on breaker 10 is produced, at this moment transfer electrode lug 24 positioned at producing between lug 26 and breaker 10, and in such configuration, transfer electrode lug 24 and breaker 10 are arranged in first layer In, and produce lug 26 and be arranged in the second side different from first layer, three substantially forms the F types layout shown in Fig. 4.In F In type layout, be typically enclosed with the nickel sheet of gummed paper across one layer between breaker 10 and battery closedtop side 38, breaker 10 with Battery closedtop side 38 is not directly contacted with, therefore the second thermally conductive pathways of the bottom of breaker 10 are obstructed.At this moment, either Fig. 1 is still Breaker 10 shown in Fig. 2 a and Fig. 2 b is all only capable of acting on by the first thermally conductive pathways, therefore be laid out in the battery using F types During the breaker that breaker or other second thermally conductive pathways are obstructed, the heat conduction of the breaker 10 of the application shown in Fig. 2 a and Fig. 2 b Compared to the thermally conductive pathways of the breaker 10 of the prior art shown in Fig. 1, the improvement to heat-conducting effect will be more significant in path, by This is visible, and embodiments herein improves the use range and practicality of other similar layouts such as F types layout.

Next, reference picture 5 and Fig. 6, according to one embodiment of the application, the top of battery main body 32 is additionally provided with Two lugs 36, the second lug 36 are connected with electrical equipment.In addition, in the embodiment as shown in fig.5, the first pole of interconnection Ear 34 and transfer electrode lug 24 are located at the second lug 36 and produced between lug 26；Alternatively, in the embodiment shown in fig. 6, turn Go out lug 26 to be located between the second lug 36 and the first lug 34 and transfer electrode lug 24 that are connected with each other.

Using the application battery 30 when, breaker 10 by adhesives on battery closedtop side 38, with Fig. 2 b Exemplified by shown breaker 10, transfer electrode lug 24 welds with the first lug 34, and the heat of battery core is via the first thermally conductive pathways and Two thermally conductive pathways are delivered in breaker 10, and the heat in breaker 10 conducts via temperature-sensitive element 20 (for example, thermistor) To thermal strain shell fragment 22, the heat of thermal strain shell fragment 22 is built up, when thermal strain shell fragment 22 reaches the operating temperature of design Rebound deformation, the second contact 16 being flicked, electric current starts change path and is delivered to temperature-sensitive element 20 from the first contact 14, when Temperature-sensitive element 20 flow through larger current (for example,>When 0.3A), its impedance moment is increased to hundred ohm or kilohm rank is (original About 10 ohm of impedance), this equivalent to big resistance is sealed in suddenly in circuit, and circuit is close to open circuit, therefore blocking causes temperature liter High reaction process (including reaction heat and Joule heat), battery core temperature is begun to decline, and is avoided the battery core caused by thermal runaway and is fired Burn.

Contrast test is carried out to the application battery and prior art battery now, has carried out two groups of contrast tests altogether, the One group of test includes embodiment 1 and comparative example 1, and the two uses the application breaker connected mode and prior art breaker respectively Connected mode, 1C/12V is carried out to the battery in embodiment 1 and comparative example 1 respectively and overcharges test；Second group of test includes implementing Example 2 and comparative example 2, the two uses the application breaker connected mode and prior art breaker connected mode respectively, right respectively Battery in embodiment 2 and comparative example 2 carries out 1C/12V and overcharges test.Wherein 1C/12V overcharges test and referred to：Battery is carried out 1C constant-current charges, when voltage reaches 12V, switch to constant voltage mode, and constant pressure 1h from constant current mode.Battery overcharges tested herein Do not smolder, do not burn in journey, do not explode for overcharge by, it is on the contrary then for failure.Test result is referring to institute in table 1 and accompanying drawing 8 The chart shown：

Table 1：Embodiment overcharges percent of pass with comparative example

Project	Embodiment 1	Comparative example 1	Embodiment 2	Comparative example 2
					1C/12V is overcharged	9/10 passes through	1/10 passes through	6/10 passes through	0/10 passes through

The result of comparative example 1 and the result of comparative example 1 and embodiment 2 and comparative example 2 can be seen that, the application battery Percent of pass is overcharged to be significantly improved.And referring in detail to the operating temperature data shown in Fig. 8, embodiment 1 and embodiment 2 Thermal strain element movement temperature is advanced by about 5 DEG C compared with comparative example 1 and comparative example 2.It follows that compared with prior art, this Shen Thermal strain element 18 that please be in embodiment battery can more sense the abnormal heating of battery core in time and cut off or reduce electric current, play Protective effect to battery core.

Embodiments herein is the foregoing is only, is not limited to the application, for those skilled in the art For member, the application can have various modifications and variations.All any modifications within spirit herein and principle, made, Equivalent substitution, improvement etc., should be included within the protection domain of the application.

Claims

A kind of 1. battery, it is characterised in that including：

Battery main body, it is provided with the first lug；And

Breaker, including the first contact, the second contact and thermal strain element, wherein, first contact is connected to institute State between the first lug and the thermal strain element, second contact include the first end that is connected with the electrical equipment with And the second end separably contacted with the main body of first contact.
2. battery according to claim 1, it is characterised in that the thermal strain element includes thermal strain shell fragment.
3. battery according to claim 2, it is characterised in that the thermal strain shell fragment is insulating part.
4. battery according to claim 2, it is characterised in that the thermal strain shell fragment is electric-conductor, the thermal strain member Part also includes the heat conducting element being connected with first contact, the heat conducting element and the thermal strain shell fragment thermal coupling, institute State thermal strain shell fragment to be arranged between the heat conducting element and second contact, the heat conducting element is insulating part or described Heat conducting element is temperature-sensitive element.
5. battery according to claim 3, it is characterised in that the thermal strain element also includes：Contacted with described first The heat conducting element of part connection, the heat conducting element and the thermal strain shell fragment thermal coupling, the thermal strain shell fragment are arranged on described Between heat conducting element and second contact.
6. battery according to claim 2, it is characterised in that the thermal strain shell fragment includes metal clips.
7. battery according to claim 4, it is characterised in that the temperature-sensitive element includes thermistor.
8. battery according to claim 1, it is characterised in that also including transfer electrode lug, wherein, the transfer electrode lug connection Between first contact and first lug.
9. battery according to claim 8, it is characterised in that also include producing lug, wherein, it is described to produce lug connection Between second contact and the electrical equipment.
10. battery according to claim 9, it is characterised in that the breaker is located at the transfer electrode lug and described turn Go out between lug, wherein, the breaker, the transfer electrode lug and the lug that produces are arranged within the same layer.
11. battery according to claim 9, it is characterised in that the transfer electrode lug is positioned at the lug and described of producing Between breaker, wherein, the transfer electrode lug and the breaker are arranged in first layer, and the lug that produces is arranged in In the second layer.
12. battery according to claim 9, it is characterised in that the battery main body is additionally provided with the second lug, wherein, Second lug is connected with the electrical equipment.
13. battery according to claim 12, it is characterised in that first lug of interconnection and the switching pole Ear is located at second lug and described produced between lug.
14. battery according to claim 12, it is characterised in that it is described produce lug be located at second lug and Between first lug and the transfer electrode lug that are connected with each other.
15. battery according to claim 1, it is characterised in that battery closedtop is also formed with the top of the battery main body Side, the breaker are fixed on the battery closedtop side, or the breaker is fixed on the top of the battery main body In portion.