CN205283173U - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
CN205283173U
CN205283173U CN201520989318.7U CN201520989318U CN205283173U CN 205283173 U CN205283173 U CN 205283173U CN 201520989318 U CN201520989318 U CN 201520989318U CN 205283173 U CN205283173 U CN 205283173U
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CN
China
Prior art keywords
secondary cell
battery pack
cell battery
cells
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201520989318.7U
Other languages
Chinese (zh)
Inventor
荒舘卓央
塙浩之
铃木利幸
菅野翔太
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Machine holding company
Original Assignee
Hitachi Koki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Classifications

    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Secondary Cells (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Biophysics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)
  • Portable Power Tools In General (AREA)

Abstract

The utility model provides a battery pack. This battery pack includes: the group battery has n (n is the natural number more than 3 a) secondary cell and organizes the battery, external connection portion can connect in the charging device that can go on the group battery charging and discharge driven electric actuator through this group battery, and k (k is more than 2 and is less than n's natural number) temperature sensitive element, a temperature for detecting this group battery, wherein, this n battery pack of secondary cell group draws together 1 secondary cell group's battery and 2 secondary cell group battery, 2 secondary cell group battery is higher than 1 secondary cell group's battery and is less than 1 secondary cell group battery at the charging process moderate temperature at the the discharge process moderate temperature, this k temperature sensitive element includes 1 temperature sensitive element and 2 temperature sensitive element, 1 temperature sensitive element and 1 secondary cell group battery contact or are close to and dispose, 2 temperature sensitive element and 2 secondary cell group battery contact or are close to ground and dispose. This battery pack can restrain group battery degradation, short lifeization.

Description

Power brick
Technical field
The utility model relates to the power brick (batterypack) that one possesses the secondary cell Battery packs (cell) such as lithium ion (lithiumion) battery.
Background technology
In the past, the power brick being built-in with series of cells was widely used as the various power supply without electric wire (cordless) power tool, and described series of cells has the secondary cell Battery packs such as multiple lithium ion batteries. And, the various solutions of the deterioration for the series of cells suppressing the rise in temperature because of secondary cell Battery pack to cause, short service life etc. are proposed to have simultaneously.
For example, it is known that there is a kind of power brick, comprising: series of cells, there is multiple secondary cell Battery pack; Thermistor (thermistor), is arranged near this secondary cell Battery pack to be monitored by a secondary cell Battery pack in multiple secondary cell Battery pack; And Protective IC (IntegratedCircuit, IC), it is connected with thermistor (patent documentation 1).
The power brick recorded in patent documentation 1 have employed following structure, namely, when charging, charging unit is connected with thermistor, charging unit uses thermistor the temperature of described secondary cell Battery pack to be monitored, when the temperature represented by thermistor is higher than specified temperature, blocks in charging unit side or limit charging current to suppress deterioration, the short service life of series of cells. And, the charging unit this power brick charged possesses cooling fan (fan), makes to produce in power brick cooling air when charging, series of cells to be cooled, thus seeks to suppress further deterioration, the short service life of series of cells.
On the other hand, when discharging, do not use thermistor to carry out the temperature monitoring of secondary cell Battery pack.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2012-009327 publication
Practical novel content
[practical novel problem to be solved]
Consider there is following structure, that is, when discharging, thermistor used when being also used in charging, to monitor the temperature of secondary cell Battery pack, when the temperature represented by thermistor is higher than specified temperature, limits/blocks the electric discharge of power tool.
But, the temperature distribution of the series of cells in power brick is different because of the configuration etc. of secondary cell Battery pack, and in other words, the temperature of each secondary cell Battery pack of series of cells is different because of the configuration in this power brick. And then, the temperature distribution of series of cells changes because of the flowing of cooling air, the presence or absence of cooling air etc., namely, in described power brick, when charging, series of cells is subject to cooling air cooling, but is cooled when discharging, due to structure for this reason, therefore when charging with, when discharging, the temperature distribution of series of cells is different. Therefore, only monitor that a described secondary cell Battery pack then exists following problems, that is, supervision for secondary cell Battery pack in addition is abundant not, thus cannot effectively suppress deterioration, the short service life of series of cells.
Therefore, the purpose of this utility model is to provide a kind of power brick, it is contemplated that to the difference of the temperature distribution of series of cells when charging and when discharging such that it is able to effectively suppress deterioration, the short service life of series of cells.
[technique means dealt with problems]
In order to solve described problem, the utility model provides a kind of power brick, comprising: series of cells, has n (wherein n is the natural number of more than 3) secondary cell Battery pack, external connecting, it is possible to the electronic device being connected to the charging unit that described series of cells can be charged and being driven by the electric discharge of described series of cells, and k (wherein k is more than 2 and is less than the natural number of n) thermal sensing element, for detecting the temperature of described series of cells, and it is characterized in that, described n secondary battery battery the 1st secondary cell Battery pack and the 2nd secondary cell Battery pack, described 2nd secondary cell Battery pack in discharge process temperature higher than described 1st secondary cell Battery pack and in process of charging temperature lower than described 1st secondary cell Battery pack, described k thermal sensing element comprises the 1st thermal sensing element and the 2nd thermal sensing element, described 1st thermal sensing element contacts with described 1st secondary cell Battery pack or closely configures, described 2nd thermal sensing element contacts with described 2nd secondary cell Battery pack or closely configures.
According to this kind of structure, the 2nd thermal sensing element that can use the 1st thermal sensing element contacting with the 1st secondary cell Battery pack or closely configuring and contact with the 2nd secondary cell Battery pack or closely configure is to monitor the temperature of series of cells, described 2nd secondary cell Battery pack in discharge process temperature higher than described 1st secondary cell Battery pack and in process of charging temperature lower than described 1st secondary cell Battery pack (discharge time with charging time, rise in temperature degree is contrary with the 1st secondary cell Battery pack). Consequently, it is possible to realize taking the difference of temperature distribution of series of cells during charging and during electric discharge into account, discharge and recharge time the temperature monitoring of series of cells such that it is able to effectively suppress deterioration, the short service life of series of cells. And, according to this kind of structure, the quantity of the thermal sensing element that the quantity of the multiple secondary cell Battery packs having than series of cells is few can be utilized effectively to suppress deterioration, the short service life of series of cells, therefore thermal sensing element is closely configured with whole multiple secondary cell Battery packs that series of cells has with compared with carrying out the structure of the temperature monitoring of series of cells, it is possible to reduce manufacturing cost.
In described structure, it is preferred that in process of charging, the temperature of described 1st secondary cell Battery pack is the highest in described n secondary cell Battery pack.
According to this kind of structure, by using the 1st thermal sensing element to carry out the temperature monitoring of series of cells in process of charging such that it is able to the temperature of the 1st secondary cell Battery pack that the temperature in process of charging in multiple secondary cell Battery packs series of cells being had is the highest monitors. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, it is preferred that in discharge process, the temperature of described 2nd secondary cell Battery pack is the highest in described n secondary cell Battery pack.
According to this kind of structure, by using the 2nd thermal sensing element to carry out the temperature monitoring of series of cells in discharge process such that it is able to the temperature of the 2nd secondary cell Battery pack that the temperature in discharge process in multiple secondary cell Battery packs series of cells being had is the highest monitors. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, preferably, comprise housing further, described housing accommodates described series of cells, and it is formed with cooling air duct, the cooling air flowing of described cooling air duct for making described series of cells to be cooled, described 1st secondary cell Battery pack on the flow direction of described cooling air, the most downstream side being configured in described n secondary cell Battery pack.
According to this kind of structure, can on the flow direction of cooling air, the 1st secondary cell Battery pack being configured in most downstream side in multiple secondary cell Battery packs that series of cells has, namely, it is possible to the temperature of the highest the 1st secondary cell Battery pack of temperature in process of charging is monitored. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, it is preferred that comprise further: charging current limiting part, in process of charging, use described 1st thermal sensing element to detect the temperature of described series of cells, and based on the temperature represented by described 1st thermal sensing element, limit the electric current flowing through described series of cells.
According to this kind of structure, charging current limiting part uses the 1st thermal sensing element to detect the temperature of series of cells in process of charging, and limit, based on the temperature represented by the 1st thermal sensing element, the electric current flowing through series of cells, therefore, it is possible to the temperature of the highest the 1st secondary cell Battery pack of temperature in process of charging in multiple secondary cell Battery packs series of cells being had monitors, and the temperature based on the 1st secondary cell Battery pack limits charging current. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, it is preferred that comprise further: discharging current limiting part, in discharge process, it may also be useful to described 2nd thermal sensing element detects the temperature of described series of cells, and limit, based on the temperature represented by described 2nd thermal sensing element, the electric current flowing through described series of cells.
According to this kind of structure, charging current limiting part uses the 2nd thermal sensing element to detect the temperature of series of cells in discharge process, and limit, based on the temperature represented by the 2nd thermal sensing element, the electric current flowing through series of cells, therefore, the temperature of the 2nd secondary cell Battery pack that the temperature in discharge process in the multiple secondary cell Battery packs that can series of cells be had is the highest monitors, and the temperature based on the 2nd secondary cell Battery pack limits discharging current. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, preferably, comprise further: battery circuit limiting part, use described 1st thermal sensing element and described 2nd thermal sensing element to detect the temperature of described series of cells, and based on temperature higher in the temperature represented by described 1st thermal sensing element and the temperature represented by described 2nd thermal sensing element, limit the electric current flowing through described series of cells.
According to this kind of structure, battery circuit limiting part limits, based on higher temperature in the temperature represented by the 1st thermal sensing element and the temperature represented by the 2nd thermal sensing element, the electric current flowing through this series of cells, therefore, it is possible to really and more effectively suppress the deterioration of series of cells, short service life.
And, it is preferred that k is 2.
According to this kind of structure, utilize two thermal sensing elements just can effectively suppress deterioration, the short service life of series of cells, therefore with use the thermal sensing element of more than three carry out series of cells temperature monitoring structure compared with, it is possible to reduce manufacturing cost further.
In order to solve described problem, the utility model and then a kind of power brick of offer, comprising: series of cells, have n (wherein n is the natural number of more than 3) secondary cell Battery pack; Housing (case), accommodates described series of cells, and is provided with the 1st ventage importing air and the 2nd ventage discharging described air; External connecting, it is possible to the electronic device being connected to the charging unit that described series of cells can be charged and being driven by the electric discharge of described series of cells; And k (wherein k is more than 2 and is less than the natural number of n) thermal sensing element, for detecting the temperature of described series of cells, and it is characterized in that, a described thermal sensing element in described k thermal sensing element is configured near described 2nd ventage.
According to this kind of structure, it is possible to being configured in the secondary cell near the 2nd ventage, namely, it is possible to monitor being configured in downstream side on the flow direction of air and there is the secondary cell Battery pack that rise in temperature degree becomes high tendency. Accordingly, it may be possible to effectively suppress the deterioration of series of cells, short service life.
And, preferably, described n secondary cell Battery pack is configured in described housing along the direction from the cooling air flowing of described 1st ventage till described 2nd ventage, the described thermal sensing element in described k thermal sensing element is configured near the described secondary cell Battery pack being positioned at the central described further downstream side of secondary cell Battery pack in the direction of described cooling air flowing.
According to this kind of structure, can to the secondary cell Battery pack of the further downstream side of secondary cell Battery pack being positioned at central authorities on the direction flowed at cooling air, namely, it is possible to the secondary cell Battery pack that there is rise in temperature degree when cooling air flows and become high tendency is monitored. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
And, it is preferred that thermal sensing element described in another in described k thermal sensing element is configured near the described secondary cell Battery pack being positioned at central authorities in the direction of described cooling air flowing.
According to this kind of structure, it is possible to the secondary cell Battery pack being positioned at central authorities on the direction flowed at cooling air, namely, it is possible to the thermal capacitance when cooling air does not flow easily is stagnated and there is the secondary cell Battery pack that rise in temperature degree becomes high tendency and monitor. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells, short service life.
(practical novel effect)
According to power brick of the present utility model, a kind of power brick can be provided, it is possible to effectively suppress deterioration, the short service life of the series of cells that the rise in temperature because of secondary cell Battery pack causes.
Accompanying drawing explanation
Fig. 1 is the sketch chart of the power brick representing the 1st enforcement mode of the present utility model.
Fig. 2 is the figure of the inside of the power brick representing the 1st enforcement mode of the present utility model.
Fig. 3 is the schematic circuit comprising block diagram of the electrical structure of the power brick representing the 1st enforcement mode of the present utility model, represents the state being connected with charging unit.
Fig. 4 is the schematic circuit comprising block diagram of the electrical structure of the power brick representing the 1st enforcement mode of the present utility model, represents the state being connected with power tool.
Fig. 5 is the schema of an example of the charging control in the charging unit representing that the power brick with the 1st enforcement mode of the present utility model is connected.
Fig. 6 is the schema representing the of the present utility model 1st example implementing the control of discharge in the power brick of mode.
Fig. 7 is the sketch chart of the power brick representing the 2nd enforcement mode of the present utility model.
[explanation of symbol]
1,100: power brick
2,600: charging unit
2a: air-supply mouth
2A: shell
2B: cooling fan
2C: battery connection part
3: power tool
3a: discharge positive terminal
3b: electric discharge negative terminal
3c: discharge side signal terminal
9,28: microcomputer
10: housing
10a: the 1 ventage
10A: lower housing
10b: the 2 ventage
10B: upper housing
10C: apparatus connecting unit
11: series of cells
11A��11J: secondary cell Battery pack
12: circuit substrate
12a: the positive terminal of discharge and recharge
12b: discharge and recharge negative terminal
12c: the 1 signal terminal
12d: the 2 signal terminal
12e: differentiate terminal
12A: connect portion of terminal
13,113: charging thermistor
14,114: electric discharge thermistor
14a: point pressure point
15: shunt resistance
16: signal sending circuit
17: differentiate resistance
18: protection IC
19: point compressive resistance
20,30: portion of terminal
20a: charge positive terminal
20b: charging negative terminal
20c: battery variety differentiates terminal
20d: charged side signal terminal
21: the 1 rectifier smoothing circuits
22: switch circuit
23: high-frequency transformer
24: the 2 rectifier smoothing circuits
25: constant voltage continuous current circuit
26: auxiliary power circuit
26A: switch portion
26B: transformer
26C: the 3 rectifying circuit
26D: constant voltage circuit
27A: signal deteching circuit
27B: battery variety differentiates circuit
27C: charging starts pilot circuit
27D: display circuit
31: motor
32: trigger switch
33: field-effect transistor (FieldEffectTransistor, FET)
34: pilot circuit
600a: suction port
600B: cooling fan
A, B: arrow
P: AC power
401��412,501��507: step
Vcc: votage reference
Embodiment
The power brick 1 of enforcement mode of the present utility model is described referring to figs. 1 through Fig. 6. Fig. 1 is the sketch chart representing power brick 1, represents the state being connected with charging unit. Fig. 2 is the figure of the inside representing power brick 1. Fig. 3 is the schematic circuit comprising block diagram of the electrical structure representing power brick 1, represents the state being connected with charging unit. Fig. 4 is the schematic circuit comprising block diagram of the electrical structure representing power brick 1, represents the state being connected with power tool.
In the following description, by be defined as before shown in Fig. 1 front to, after be defined as rear to, on be defined as upper direction, give a definition for lower direction, and then, by being defined as left direction from left side during rear observation, the right side be defined as right direction. In addition, when mentioning concrete numerical value, such as, when mentioning voltage as " 3.2V " etc., not only comprise the value completely the same with this numerical value, also comprise the value roughly the same with this numerical value.
As shown in Figure 1 to Figure 3, power brick 1 forms joinably with charging unit 2, charges when being connected with charging unit 2. And, as shown in Figure 4, power brick 1 is discharged when being connected with power tool 3, becomes the driving source of power tool 3. In addition, have employed following structure: when utilizing charging unit 2 to charge, power brick 1 is cooled, but when being discharged by power tool 3, does not cool.
Herein, the structure of charging unit 2 is described. As shown in Figure 1, the charging unit 2 being connected with power brick 1 has shell (housing) 2A and cooling fan 2B.
Shell 2A is the part of the gabarit forming charging unit 2, has battery connection part 2C, and is formed with air-supply mouth 2a. Battery connection part 2C is arranged on the upper surface of shell 2A, is formed as the shape can being connected with power brick 1. Air-supply mouth 2a be the upper surface at shell 2A, be formed in the front side of battery connection part 2C, when being connected with power brick 1, with the 1st ventage 10a of power brick 1 described later in opposite directions.
Cooling fan 2B is the front portion in shell 2A, is housed in the underface of air-supply mouth 2a. Cooling fan 2B produces cooling air when charging, and is sent in the housing 10 of power brick 1 by cooling air from air-supply mouth 2a.
Herein, the explanation of power brick 1 is returned. As shown in Figures 1 and 2, power brick 1 possesses housing 10, series of cells 11, the circuit substrate 12 being provided with protection IC18, charging thermistor 13 and electric discharge thermistor 14. And, by make power brick 1 along Fig. 1 in the past direction backwards slide (slide), thus be connected to charging unit 2.
Housing 10 is the part of the gabarit forming power brick 1, has lower housing 10A and upper housing 10B. And, in the inside of housing 10, contain series of cells 11, circuit substrate 12, charging thermistor 13 and electric discharge thermistor 14.
Lower housing 10A is the part of the downside of housing 10, possesses apparatus connecting unit 10C. And, on lower housing 10A, it is formed with the 1st ventage 10a.
Apparatus connecting unit 10C is formed as the shape that can be connected with charging unit 2 and can be connected with power tool 3. By being connected with charging unit 2 by apparatus connecting unit 10C, thus power brick 1 and charging unit 2 electrically and are mechanically connected. And, by apparatus connecting unit 10C is connected to power tool 3, thus power brick 1 and power tool 3 electrically and are mechanically connected.
1st ventage 10a is formed in the front of the apparatus connecting unit 10C of lower housing 10A lower surface. 1st ventage 10a when power brick 1 is connected with charging unit 2, with the air-supply mouth 2a of charging unit 2 in opposite directions.
Upper housing 10B occupies the upper portion of housing 10, it is provided that to the space that series of cells 11, circuit substrate 12, charging thermistor 13 and electric discharge thermistor 14 are accommodated. And, on upper housing 10B, it is formed with the 2nd ventage 10b. 2nd ventage 10b is formed on the rear surface of upper housing 10B, is discharged by the cooling air (air) being directed in housing 10 from the 1st ventage 10a. And, in housing 10, it being formed from the 1st ventage 10a until the cooling air duct of the 2nd ventage 10b, series of cells 11 is cooled by the cooling air flowing through this cooling air duct. In addition, the arrow A of Fig. 1 represents cooling air.
Series of cells 11 have employed following structure, that is, by 10 secondary cell Battery pack 11A��11J, be connected in series 5 batteries by multiple web plate and be connected in parallel 2 groups. In the present embodiment, secondary cell Battery pack 11A��11J is chargeable lithium ion battery, and voltage rating (ratedvoltage) is 3.60V, and series of cells entirety is 18.0V.
Secondary cell Battery pack 11A��11J configures in 5 row and in the way of being 2 layers up and down by front and back. Specifically, in lower floor, from rear, it is configured with secondary cell Battery pack 11A, 11B, 11C, 11D, 11E successively, on upper strata, from rear, it is configured with secondary cell Battery pack 11F, 11G, 11H, 11I, 11J successively. That is, secondary cell Battery pack 11A��11J configures along the flow direction (hereinafter referred to as cooling air direction A) of cooling air. The secondary cell Battery pack 11E being configured in the front side of lower floor is positioned at the surface of the 1st ventage 10a, and be configured in secondary cell Battery pack 11A��11J on the flow direction of cooling air side, most upstream position and near the position of the 1st ventage 10a. The secondary cell Battery pack 11A being configured in the last side of lower floor is positioned at the front of the 2nd ventage 10b, and the position, most downstream on the A of cooling air direction being configured in secondary cell Battery pack 11A��11J and the position near the 2nd ventage 10b.
Circuit substrate 12 is arranged on the lower section of series of cells 11 in housing 10 inside, and possesses connection portion of terminal 12A. And, on circuit substrate 12, it is provided with and the circuit that series of cells 11 is connected. The detailed situation of circuit is by aftermentioned.
As shown in Figure 2, connect portion of terminal 12A and it is arranged on side after the lower surface of circuit substrate 12, and there is multiple terminal. Multiple terminal, when charging unit 2 or power tool 3 are connected with power brick 1, is connected with the regulation terminal of the regulation terminal of charging unit 2 or power tool 3. The detailed situation of multiple terminal is by aftermentioned. Connect the example that portion of terminal 12A is the external connecting in the utility model.
As shown in Figures 1 and 2, charging thermistor 13 arranges to secondary cell Battery pack 11A at the lower contacts of secondary cell Battery pack 11A. That is, arrange near secondary cell Battery pack 11A. And, charging thermistor 13 is connected to circuit substrate 12 by lead-in wire (wire). Charging thermistor 13 is the thermal sensing element that resistance changes depending on temperature, the temperature of secondary cell Battery pack 11A is detected, and exports the temperature information of secondary cell Battery pack 11A to charging unit 2 when charging. Charging thermistor 13 is an example of the 1st thermal sensing element in the utility model.
Electric discharge thermistor 14 arranges to secondary cell Battery pack 11C at the lower contacts of secondary cell Battery pack 11C. That is, arrange near secondary cell Battery pack 11C. And, electric discharge thermistor 14 is connected to circuit substrate 12 by going between. Electric discharge thermistor 14 is the thermal sensing element that resistance changes depending on temperature, the temperature of secondary cell Battery pack 11C is detected, and the temperature information of secondary cell Battery pack 11A exports to protection IC18 when discharging. Secondary cell Battery pack 11C and secondary cell Battery pack 11H, on the direction that cooling air flows, is positioned at the central authorities of multiple secondary cell Battery pack. Charging thermistor 13 is configured in and is positioned at than near the secondary cell Battery pack 11A of the central further downstream side of multiple secondary cell Battery pack. Electric discharge thermistor 14 is an example of the 2nd thermal sensing element in the utility model.
Herein, it is described about the configuration of charging thermistor 13 and electric discharge thermistor 14. Deterioration, the short service life of the configuration of charging thermistor 13 in present embodiment and electric discharge thermistor 14 in order to effectively suppress series of cells 11, it is contemplated that to the difference of temperature distribution during charging in series of cells 11 and during electric discharge.
In order to effectively suppress the deterioration because rise in temperature during secondary cell Battery pack 11A��11J discharge and recharge causes, short service life, the difference of the temperature distribution of the series of cells 11 when key is that consideration is charged and when discharging is to monitor the temperature of secondary cell Battery pack. Namely, key is, when charging, the secondary cell Battery pack that temperature can become higher tendency that exists in secondary cell Battery pack 11A��11J when charging is monitored, when discharging, the secondary cell Battery pack that temperature can become higher tendency that exists in secondary cell Battery pack 11A��11J when discharging is monitored.
Such as, in the structure only monitoring a secondary cell Battery pack, if this secondary cell Battery pack in time charging and during electric discharge in multiple secondary cell Battery pack rise in temperature degree be moderate, then temperature all high than this secondary cell Battery pack secondary cell Battery pack when being present in charging and during electric discharge. Now; if the restriction/blocking-up of charging and discharging currents waits protection method to take to use the temperature of this secondary cell Battery pack; though deterioration, the short service life of this secondary cell Battery pack can be suppressed effectively; but cannot effectively suppress deterioration, the short service life of the secondary cell Battery pack that this secondary cell Battery pack of Temperature Ratio is high when discharge and recharge; even; overall as series of cells, also cannot effectively suppress deterioration, short service life.
In present embodiment, the position, most downstream in cooling air direction when secondary cell Battery pack 11A is configured in charging, the cooling air therefore reaching the highest by temperature is cooled. Therefore, there is following tendency in secondary cell Battery pack 11A, that is, when charging, in secondary cell Battery pack 11A��11J, temperature becomes the highest. And, between the secondary cell Battery pack on the front and back that secondary cell Battery pack 11C is configured in series of cells 11 substantial middle upwards and circuit substrate 12 and upper strata, therefore when carrying out, without cooling air, the electric discharge cooled, heat is the most easily stagnated. Therefore, there is following tendency in secondary cell Battery pack 11C, that is, when discharging, in secondary cell Battery pack 11A��11J, temperature becomes the highest. In present embodiment, adopt following structure, namely, the difference of the temperature distribution of the series of cells 11 when considering described charging and when discharging, charging thermistor 13 is arranged near secondary cell Battery pack 11A, use when charging the temperature of secondary cell Battery pack 11A to block charging current, electric discharge thermistor 14 is arranged near secondary cell Battery pack 11C, use when discharging the temperature of secondary cell Battery pack 11C to block discharging current.
In addition, in present embodiment, the difference of the temperature distribution of the series of cells 11 when considering charging and when discharging, charging thermistor is become the secondary cell Battery pack 11A of the highest tendency and arrange near there is temperature when charging, electric discharge thermistor is become the secondary cell Battery pack 11C of the highest tendency and arrange near there is temperature when discharging, thus restrained effectively the deterioration of series of cells 11 entirety, short service life, but according to following structure, namely, near a secondary battery cell arrangement charging thermistor, and near there is the high tendency of this secondary cell Battery pack of Temperature Ratio in discharge process and there is another secondary battery cell arrangement electric discharge thermistor of the low tendency of this secondary cell Battery pack of Temperature Ratio in process of charging, then can effectively suppress the deterioration of series of cells entirety (multiple secondary cell Battery pack), short service life. secondary cell Battery pack 11A is an example of the 1st secondary cell Battery pack in the utility model, and secondary cell Battery pack 11C is an example of the 2nd secondary cell Battery pack in the utility model.
And, the different meetings of temperature distribution when series of cells is charged and temperature distribution when discharging change because of the configuration structure (upper and lower 2 layers, upper and lower 3 layers etc.) of the flowing of cooling air, the shape of cooling air duct, multiple secondary cell Battery pack, as long as therefore by experiment etc. carrying out analyzing. Equally, in multiple secondary cell Battery pack, having when charging that temperature becomes the secondary cell Battery pack of high tendency and there is the secondary cell Battery pack that temperature becomes high tendency when discharging is the secondary cell Battery pack being configured in which position, as long as also obtaining by experiment etc.
As the method for experiment, consider to charge from the state that multiple secondary cell Battery pack is normal temperature, after the specified time, the temperature of whole secondary cell Battery pack is being measured from charging, investigate which secondary cell Battery pack and turn into high temperature, and, discharge from the state that multiple secondary cell Battery pack is normal temperature, measuring the temperature of whole secondary cell Battery pack from electric discharge after the specified time, investigate which secondary cell Battery pack and turn into high temperature etc.
And, according to another viewpoint, consider from the state that multiple secondary cell Battery pack is normal temperature, measure the temperature of secondary cell Battery pack while starting charging, investigate which secondary cell Battery pack and reach specified temperature (for blocking the temperature threshold value of charging current) the soonest, and, from the state that multiple secondary cell Battery pack is normal temperature, measuring the temperature of secondary cell Battery pack while starting electric discharge, investigating which secondary cell Battery pack and reaching specified temperature (for blocking the threshold value of discharging current) etc. the soonest.
And, according to another viewpoint, it is possible to the state being normal temperature from multiple secondary cell Battery pack institutes an inquiry the specific temperature rise (DEG C/s) of secondary cell Battery pack. That is, as long as the method temperature distribution during discharge and recharge of series of cells can analyzed, then it is that any method all may be used.
And, the deterioration of series of cells 11, the structure of short service life is effectively suppressed as the difference of temperature distribution of the series of cells 11 when considering charging and during electric discharge, also can consider to configure the structure of thermistor near whole secondary cell Battery pack 11A��11J, but described structure can cause the increase of manufacturing cost. On the other hand, in present embodiment, consider that the rise in temperature degree (temperature distribution of series of cells) of secondary cell Battery pack 11A and secondary cell Battery pack 11C when discharge and recharge configures charging thermistor 13 and electric discharge thermistor 14, therefore without the need to whole secondary cell Battery pack 11A��11J is arranged thermistor, deterioration, the short service life of series of cells 11 just can effectively be suppressed.
Next, the electrical structure of power brick 1 is described with reference to Fig. 3 and Fig. 4.
As shown in Figures 3 and 4, there is described series of cells 11, connection portion of terminal 12A, charging thermistor 13 and electric discharge thermistor 14, shunt resistance (shuntresistance) 15, signal sending circuit 16, differentiate resistance 17 and protection IC18.
Series of cells 11 is connected to discharge and recharge just (plus) terminal 12a and negative (minus) the terminal 12b of discharge and recharge. Secondary cell Battery pack 11A and the positive terminal connection of secondary cell Battery pack 11F that in series of cells 11, current potential is the highest in connection portion of terminal 12A and protect IC18. Secondary cell Battery pack 11E and the negative terminal of secondary cell Battery pack 11J that in series of cells 11, current potential is minimum are connected to protection IC18, and are connected to via shunt resistance 15 and connect portion of terminal 12A and ground terminal (ground). And, secondary cell Battery pack 11A��11J is connected to each other and is a little connected to protection IC18, carrys out, by protection IC18, the voltage monitoring individually whole 10 batteries.
Connect portion of terminal 12A there is the positive terminal 12a of discharge and recharge, discharge and recharge negative terminal 12b, the 1st signal terminal 12c, the 2nd signal terminal 12d and differentiate terminal 12e.
The positive terminal connection of discharge and recharge positive terminal 12a and secondary cell Battery pack 11A and secondary cell Battery pack 11F. The positive terminal that the discharge and recharge that discharge and recharge positive terminal 12a is described as follows is dual-purpose, that is, when power brick 1 is connected with charging unit 2, it is connected to the charging circuit of charging unit 2, and the driving circuit when being connected with power tool 3, then set by being connected in power tool 3.
Discharge and recharge negative terminal 12b is connected to secondary cell Battery pack 11E and the negative terminal of secondary cell Battery pack 11J via shunt resistance 15. The negative terminal that the discharge and recharge that discharge and recharge negative terminal 12b is described as follows is dual-purpose, that is, when power brick 1 is connected with charging unit 2, it is connected to the charging circuit of charging unit 2, and when power brick 1 is connected with power tool 3, then it is connected to the driving circuit of power tool 3.
Shunt resistance 15 is that its two ends are connected to protection IC18 for flowing through the electric current of series of cells 11, that is, resistance charging current and discharging current detected to when charging and during electric discharge. Protection IC18 imports the voltage drop value of shunt resistance 15, calculates current value according to described voltage drop value.
1st signal terminal 12c is connected to ground terminal and microcomputer (microcomputer) 9 via charging thermistor 13, and charging unit 2 exports the charging temperature information signal of the temperature representing secondary cell Battery pack 11A.
2nd signal terminal 12d is connected to protection IC18, when power brick 1 is connected with power tool 3, exports the discharge stop signal from protection IC18 to power tool 3. Power tool 3, when receiving discharge stop signal, blocks current circuit (1ine) set in driving circuit etc. and stops electric discharge. Discharge stop signal is the protection signal that exports to block discharging current in following three kinds of situations of IC18, that is: the temperature that the electric current flowing through series of cells 11 exceedes the secondary cell Battery pack 11C represented by the situation of the current value of regulation (hereinafter referred to as current threshold), electric discharge thermistor 14 reaches in the situation of specified temperature (hereinafter referred to as temperature threshold value), the secondary cell Battery pack 11A��11J of series of cells 11 and has the voltage of any one to reach the situation of below overdischarge threshold value. And, current threshold and temperature threshold value are judged as, if discharging current, battery temperature exceed respective value, then likely causes the deterioration of secondary cell Battery pack 11A��11J or the value of fault. And, overdischarge threshold value is judged as, if the cell voltage of secondary cell Battery pack 11A��11J becomes below this value, then likely causes the deterioration of secondary cell Battery pack 11A��11J or the value of fault.
Differentiate that terminal 12e is connected with differentiation resistance 17. The resistance value of differentiation resistance 17 is the proper value corresponding with the kind of series of cells 11. Charging unit 2 reads described proper value from the regulation terminal being connected with differentiation terminal 12e, to differentiate the kind of series of cells 11. Charging unit 2 obtains the information such as the voltage rating of the cell number (being 10 batteries in present embodiment) that series of cells 11 has, method of attachment (number in parallel and series connection number), each battery according to the kind of the series of cells 11 read, and uses described information to carry out charging control.
The kind of so-called series of cells, refers to that the difference of the characteristic (voltage rating time series of cells entirety, rated capacity, permission maximum charging current, allow top temperature etc.) having according to the series of cells entirety should considered when charge and discharge control is classified. That is, if described characteristic is different, then the kind of series of cells is different. Specifically, the cell number of storage battery cell series of cells possessed, connect structure, the difference person such as the voltage rating of each battery, rated capacity, permission maximum charging current be called kind difference. Such as, even if the storage battery cell that voltage rating is identical, but for the series of cells of the structure that 4 described storage battery cells are connected in series, the series of cells of structure that three described storage battery cells are connected in series and there are 4 described storage battery cells and the series of cells of structure that is all connected in parallel by 4 batteries, owing to the characteristics such as the voltage rating of series of cells entirety, rated capacity are different from each other, therefore kind is different.
Signal sending circuit 16 is connected to protection IC18 and the 1st signal terminal 12c, and the overcharge signal exported from protection IC18 is exported to by the 1st signal terminal 12c the circuit of charging unit 2 when charging. When overcharge signal protects IC18 to have any one battery to reach more than overcharge threshold value in the secondary cell Battery pack 11A��11J being judged as series of cells 11, to the signal that signal sending circuit 16 exports. If overcharge threshold value is the state that the voltage being judged as secondary cell Battery pack 11A��11J continues more than described threshold value, likely cause the value of deterioration or fault.
Charging thermistor 13 is arranged between ground terminal and the 1st signal terminal 12c, exports the charging temperature signal of the temperature representing secondary cell Battery pack 11A to charging unit.
One end of electric discharge thermistor 14 is connected to the reference voltage V cc exported from protection IC18, and its other end is connected to ground terminal via point compressive resistance 19. Namely electric discharge thermistor 14 divides pressure point 14a to be connected to protection IC18 with the tie point of point compressive resistance 19. Pressure point 14a is divided to export the partial pressure value and electric discharge temperature signal that represent the temperature of secondary cell Battery pack 11C to protection IC18.
Protection IC18 mainly possesses read-only storage (ReadOnlyMemory; ROM), computing portion, random access memory (RandomAccessMemory; RAM), timing function, multiple analog/digital (AnalogtoDigital; A/D) input port (port) and multiple output port, export discharge stop signal, overcharge signal etc. and control power brick 1. In addition, it is possible to form protection IC18 by microcomputer. Protection IC18 is an example of the discharging current limiting part in the utility model.
ROM is non-volatile storage area, stores and is used to each handling procedure (program) of various control, threshold value, table (table) etc. The various signals inputing to A/D input port are carried out calculation process according to handling procedure by computing portion, and the result of described process are exported as described various signal from the output port of regulation. RAM is the storage area of volatibility, temporary storage data when carrying out calculation process etc. in computing portion. Timing function is the function of meter survey time, is carry out the time for various control counting the function surveyed.
Next, the electrical structure of the charging unit 2 being connected to power brick 1 is described. As shown in Figure 3, charging unit 2 possesses portion of terminal 20, the 1st rectifier smoothing circuit 21, switch (switching) circuit 22, high-frequency transformer (transformer) the 23, the 2nd rectifier smoothing circuit 24, constant voltage continuous current circuit 25, auxiliary power circuit 26, signal deteching circuit 27A, battery variety differentiates circuit 27B, charging starts pilot circuit 27C, display circuit 27D and microcomputer 28, when being provided with power brick 1, by the charging control of continuous current constant voltage, the series of cells 11 of power brick 1 inside is charged. In addition, so-called continuous current constant voltage charging control, refer to following described charging control, namely, when starting when charging, while charging current being controlled to fixing current value (target current value) while carrying out charge (constant current controlling is interval), after the voltage of series of cells 11 entirety reaches target voltage values, while charging voltage being remained described target voltage values while carrying out charge (between constant voltage control region), in constant voltage control region, the complete charge when charging current reaches below the termination current value of regulation.
Portion of terminal 20 is the part being connected with power brick 1, has the positive terminal 20a of charging, charging negative terminal 20b, battery variety differentiation terminal 20c and charged side signal terminal 20d. The positive terminal 20a that charges is the terminal that terminal 12a positive with the discharge and recharge of power brick 1 is connected, and charging negative terminal 20b is the terminal being connected to discharge and recharge negative terminal 12b. Charging unit 2 exports charging voltage and charging current from the positive terminal 20a of charging and charging negative terminal 20b. And, battery variety differentiates that terminal 20c is the terminal that the differentiation terminal 12e with power brick 1 is connected, and charged side signal terminal 20d is the terminal that the 1st signal terminal 12c with power brick 1 is connected.
1st rectifier smoothing circuit 21 has full-wave rectification circuit and smoothing capacitor, utilizes full-wave rectification circuit that the voltage of alternating current supplied from AC power P is carried out full-wave rectification, and utilizes smoothing capacitor to carry out exporting volts DS after smoothly. AC power P is the outside power supplys such as commercial power supply.
Switch circuit 22 is connected to the 1st rectifier smoothing circuit 21, there is metal oxide semiconductor field effect transistor (MOSFET) (MetalOxideSemiconductorFieldEffectTransistor, MOSFET), width modulation (PulseWidthModulation, PWM) controls IC etc. Switch circuit 22 controls charging current, charging voltage by control dutycycle (dutyrate).
High-frequency transformer 23 is connected between switch circuit 22 and the 2nd rectifier smoothing circuit 24, the voltage exported from switch circuit 22 is carried out buck or boost and exports the 2nd rectifier smoothing circuit 24 to.
2nd rectifier smoothing circuit 24 has diode (diode), smoothing capacitor, electric discharge resistance etc., and be configured to: the output voltage obtained from high-frequency transformer 23 is carried out rectification and smoothly generates volts DS, and described volts DS is exported from the positive terminal 20a of charging and charging negative terminal 20b via the constant voltage continuous current circuit 25 of charging unit 2.
Constant voltage continuous current circuit 25 is connected to the 2nd rectifier smoothing circuit 24, charge positive terminal 20a and charging negative terminal 20b. Constant voltage continuous current circuit 25 exports continuous current in constant current controlling interval to power brick 1, between constant voltage control region, charging voltage is set to constant voltage.
Auxiliary power circuit 26 is connected to the 1st rectifier smoothing circuit 21, is the constant voltage power supply circuit of the reference voltage V cc for supplying stabilization to microcomputer 28 or various circuit. Auxiliary power circuit 26 has switch portion 26A, transformer 26B, the 3rd rectifying circuit 26C and constant voltage circuit 26D. The voltage exported from the 1st rectifier smoothing circuit 21 to transformer 26B is carried out switch and exports by switch portion 26A. Transformer 26B is connected between switch portion 26A and the 3rd rectifying circuit 26C, to carrying out buck or boost by the voltage of switch portion 26A switch and export the 3rd rectifying circuit 26C to. 3rd rectifying circuit 26C is connected to constant voltage circuit 26D, the voltage exported from transformer 26B carries out rectification and smoothly and exports constant voltage circuit 26D to. Constant voltage circuit 26D exports, as the reference voltage V cc of stabilization, the voltage exported from the 3rd rectifying circuit 26C to microcomputer 28.
Signal deteching circuit 27A is connected to charged side signal terminal 20d and microcomputer 28, and the overcharge signal and the charging temperature signal that power brick 1 are exported via charged side signal terminal 20d detect, and export the circuit of microcomputer 28 to. Signal deteching circuit 27A comprises point compressive resistance with known value, use described point compressive resistance to detect charging temperature signal, specifically, utilize described point compressive resistance and charging thermistor 13 that the Vcc of charging unit 2 side is carried out dividing potential drop, and export described partial pressure value to microcomputer 28. Microcomputer 28 uses described partial pressure value to obtain the temperature of the secondary cell Battery pack 11A represented by charging thermistor 13.
Battery variety differentiates that circuit 27B is connected to battery variety and differentiates terminal 20c and microcomputer 28, and comprises point compressive resistance with known value. Battery variety differentiates that circuit 27B utilizes this point of compressive resistance and differentiates that the Vcc of charging unit 2 side is carried out dividing potential drop by resistance, and exports described partial pressure value to microcomputer 28. Microcomputer 28 uses described partial pressure value to differentiate the battery variety of series of cells 11.
Microcomputer 28 possesses the IC needed for the charging control such as ROM and central processing unit (CentralProcessingUnit, CPU) or element, carries out the continuous current constant voltage charging control of power brick 1. ROM is non-volatile storage area, stores and is used to each handling procedure of various control, threshold value, table etc. The various signals inputing to microcomputer 28 are carried out calculation process according to handling procedure by CPU.
Charging starts pilot circuit 27C and is connected to microcomputer 28 and constant voltage continuous current circuit 25, to be exported by constant voltage continuous current circuit 25 charging commencing signal based on the signal from microcomputer 28 and charge to terminate signal.
Display circuit 27D is the circuit for showing charging state, is connected to microcomputer 28. Display circuit 27D possesses photodiode (LightEmittingDiode, LED), resistance etc., and is configured to: can send red light, orange-colored light, green light based on the signal from microcomputer 28.
Next, the electrical structure of the power tool 3 being connected to power brick 1 is described. As shown in Figure 4, power tool 3 possesses portion of terminal 30, motor (motor) 31, triggers switch (triggerswitch) 32, field-effect transistor (FieldEffectTransistor, FET) 33 and pilot circuit 34, when being provided with power brick 1, it may also be useful to the series of cells 11 of power brick 1 inside is used as driving source. Power tool 3 is an example of the electronic device in the utility model.
Portion of terminal 30 is the part being connected with power brick 1, has the positive terminal 3a of electric discharge, electric discharge negative terminal 3b, discharge side signal terminal 3c. The positive terminal 3a that discharges is the terminal that terminal 12a positive with the discharge and recharge of power brick 1 is connected, and electric discharge negative terminal 3b is the terminal being connected to discharge and recharge negative terminal 12b. Power tool 3 is supplied to the electric power of series of cells 11 via the positive terminal 3a of electric discharge and electric discharge negative terminal 3b, thus can drive. And, discharge side signal terminal 3c is the terminal that the 2nd signal terminal 12d with power brick 1 is connected.
Motor 31 is the propulsion source of power tool 3. Triggering switch 32 is the switch that can operate by operator, is arranged on motor 31 and discharges between positive terminal 3a. FET33 is arranged between motor 31 and electric discharge negative terminal 3b. It is configured to: only when FET33 and triggering switch 32 are all in conducting (ON) state, just make electric current flow through motor 31.
Pilot circuit 34 is the circuit of control FET33, is connected to FET33 and discharge side signal terminal 3c. Pilot circuit 34 is when having discharge stop signal from power brick 1 input, and the FET33 that should stop electric discharge disconnecting (OFF).
Next, with reference to Fig. 5, while illustrating that the charging of power brick 1 is controlled by charging unit 2. Fig. 5 is the schema of an example of the charging control representing charging unit 2.
Series of cells 11 is carried out the charging control of continuous current constant voltage by charging unit 2, and carry out following control, that is, the temperature of the secondary cell Battery pack 11A represented by charging thermistor 13 is monitored, when described temperature reaches more than specified temperature, block charging current.
First, if connecting AC power P and charging unit 2, then microcomputer 28 beginning action, in order to represent the standby state of charging before charging, make display circuit 27D light up as redness (step 401).
Next, differentiate whether have power brick 1 to be installed in charging unit 2 (step 402). The differentiation whether having power brick 1 to install utilizes whether to differentiate that circuit 27B has signal to differentiate to microcomputer 28 input from battery variety. It is installed on charging unit 2 if being determined as in step 402 without power brick 1, then repeating step 401 and step 402, and continues the standby state of charging, until there being power brick 1 to be installed in charging unit 2.
On the other hand, it is installed in charging unit 2 if being determined as power brick 1 in step 402, then differentiates the kind (step 403) of battery. In step 403, by reading, battery variety differentiates that the partial pressure value of circuit 28B differentiates the battery variety of power brick 1 to microcomputer 28.
Next, in step 404, power brick 1 is set the charging voltage between suitable constant voltage control region based on the battery variety determined by microcomputer 28, in step 405, power brick 1 sets based on the battery variety determined the charging current in suitable constant current controlling interval.
In step 405, after having set target current value, charging (step 406) is started. Starting of charging is undertaken by exporting charging commencing signal from microcomputer 28 pilot circuit 27C to charging. Now, it is in process of charging to represent, display circuit 27D is lit up as orange.
When starting when charging, use charging thermistor 13 to detect the temperature of secondary cell Battery pack 11A in step 407, and differentiate whether described temperature reaches more than temperature threshold value. If the temperature of secondary cell Battery pack 11A reaches more than temperature threshold value (step 407 be (YES)), then complete charge in step 410. That is, in order to suppress the rise in temperature because of series of cells 11 to cause deterioration, short service life, block charging current to protect series of cells 11. In addition, the end of charging is undertaken by starting pilot circuit 27C output charging end signal to charging.
On the other hand, if the temperature of secondary cell Battery pack 11A does not reach more than temperature threshold value (no (NO) of step 407) in step 407, then differentiate whether have overcharge signal from power brick 1 output in a step 408. Whether output has the judgement of overcharge signal to be according to whether output has overcharge signal to judge from power brick 1 to signal deteching circuit 27A.
Overcharge signal (step 408 be) is had, then complete charge in step 410 if exporting. On the other hand, if not exporting overcharge signal (step 408 no), then whether fully charged differentiate in step 409. The whether fully charged judgement of series of cells 11 whether reaches below the termination current value being applicable to the series of cells 11 distinguished based on battery variety to judge according to charging current. In addition, when charging current reaches below termination current value, then it is judged as fully charged.
If series of cells 11 underfill electricity (step 409 no), then return step 407. That is, if the temperature of secondary cell Battery pack 11A does not reach more than temperature threshold value and does not export overcharge signal, then repeating step 407��step 409 while continue charging, till fully charged.
On the other hand, if in step 409, series of cells 11 is fully charged (step 409 be), then complete charge in step 410. At the end of charging, in order to represent that charging terminates and make display circuit 27D light up as green (step 411).
Terminate in charging, after display circuit 27D lights up as green, differentiate whether power brick 1 departs from (step 412) from charging unit 2. If being determined as power brick 1 not depart from from charging unit 2, then repeating step 412, maintaining display circuit 27D and lighting up as green state. On the other hand, depart from from charging unit 2 if being determined as power brick 1, then return step 401, make display circuit 27D light up as the redness of the standby state before representing charging. Further, repeating step 401 and step 402, continue the standby state of charging, till being again provided with power brick 1.
Next, the control of discharge of power brick 1 is described with reference to Fig. 6. Fig. 6 is the schema of an example of the control of discharge representing power brick 1.
The temperature of the secondary cell Battery pack 11C represented by electric discharge thermistor 14 is monitored by power brick 1 in discharge process, when described temperature reaches more than specified temperature, takes the measure for blocking charging current.
First, power brick 1 is connected with power tool 3, when operate trigger switch 32 time, if protection IC18 starts action, then in step 501, the respective voltage of secondary cell Battery pack 11A��11J is monitored.
Next, monitor discharging current in step 502. The supervision of discharging current uses shunt resistance 15 to carry out. In step 503, then, the electric discharge temperature signal exported from electric discharge thermistor 14 is monitored.
At the end of the supervision of step 501��503, in step 504, differentiate whether there is the secondary cell Battery pack being in over-discharge state. Described differentiation is undertaken by the respective voltage of secondary cell Battery pack 11A��11J and overdischarge threshold value being compared. If secondary cell Battery pack 11A��11J voltage separately there being any one reach below overdischarge threshold value (step 504 be), then export discharge stop signal from the 2nd signal terminal 12d to power tool 3. If output discharge stop signal, then, in step 507, FET33 is set to disconnection state to block discharging current by the pilot circuit 34 of power tool 3. After discharging current is blocked, continue described blocking state, till making power tool 3 depart from power brick 1.
On the other hand, if being judged as in step 504 there is not the secondary cell Battery pack (step 504 no) being in over-discharge state, then differentiate whether discharging current reaches more than current threshold in step 505. Described differentiation is undertaken by discharging current and current threshold being compared. If discharging current reaches more than current threshold (step 505 be), then export discharge stop signal from the 2nd signal terminal 12d to power tool 3. If output discharge stop signal, then, in step 507, FET33 is set to disconnection state to block discharging current by the pilot circuit 34 of power tool 3.
On the other hand, if being judged as in step 505, discharging current does not reach more than current threshold (step 505 no), then differentiate whether the temperature of the secondary cell Battery pack 11C represented by electric discharge thermistor 14 reaches more than temperature threshold value in step 506. Described differentiation is undertaken by the temperature represented by electric discharge thermistor 14 and temperature threshold value being compared. If the temperature represented by electric discharge thermistor 14 reaches more than temperature threshold value (step 506 be), then export discharge stop signal from the 2nd signal terminal 12d to power tool 3. If output discharge stop signal, then, in step 507, FET33 is set to disconnection state to block discharging current by the pilot circuit 34 of power tool 3.
On the other hand, if being judged as in step 506, discharging current does not reach more than current threshold (step 506 no), then return step 501. Namely, if secondary cell Battery pack 11A��11J voltage separately does not reach below overdischarge threshold value, and discharging current does not reach more than current threshold, and the temperature represented by electric discharge thermistor 14 do not reach more than temperature threshold value, then repeating step 501��506 is while continue electric discharge.
So, the power brick 1 of the 1st enforcement mode of the present utility model comprises: series of cells 11, has 10 secondary cell Battery pack 11A��11J; Connect portion of terminal 12A, it is possible to the power tool 3 being connected to the charging unit 2 that series of cells 11 can be charged and being driven by the electric discharge of series of cells 11; And two thermal sensing elements, for detecting the temperature of series of cells 11,10 secondary cell Battery pack 11A��11J comprise: secondary cell Battery pack 11A; And secondary cell Battery pack 11C, in discharge process, temperature is lower than secondary cell Battery pack 11A higher than secondary cell Battery pack 11A and in process of charging for temperature, and two thermal sensing elements comprise the charging thermistor 13 contacting with secondary cell Battery pack 11A or closely configuring and the electric discharge thermistor 14 contacting with secondary cell Battery pack 11C or closely configuring.
Therefore, the electric discharge thermistor 14 that can use the charging thermistor 13 contacting with secondary cell Battery pack 11A or closely configuring and contact with secondary cell Battery pack 11C or closely configure is to monitor the temperature of series of cells 11, described secondary cell Battery pack 11C in discharge process temperature higher than secondary cell Battery pack 11A and in process of charging temperature lower than secondary cell Battery pack 11A (discharge time with charging time, rise in temperature degree is contrary with secondary cell Battery pack 11A). Consequently, it is possible to realize taking the difference of temperature distribution of the series of cells 11 during charging and during electric discharge into account, discharge and recharge time the temperature monitoring of series of cells 11 such that it is able to effectively suppress deterioration, the short service life of series of cells 11. And, according to this kind of structure, the quantity (two) of the thermal sensing element that the quantity (10) of the multiple secondary cell Battery packs having than series of cells 11 is few can be utilized effectively to suppress deterioration, the short service life of series of cells 11, therefore with whole configuration thermal sensing elements of the multiple secondary cell Battery packs having near series of cells 11 with compared with carrying out the structure of the temperature monitoring of series of cells, it is possible to reduce manufacturing cost.
And, in process of charging, the temperature of the secondary cell Battery pack 11A of power brick 1 is the highest in 10 secondary cell Battery pack 11A��11J. Therefore, by using charging thermistor 13 to carry out the temperature monitoring of series of cells 11 in process of charging such that it is able to the temperature of the secondary cell Battery pack (being secondary cell Battery pack 11A in present embodiment) that the temperature in process of charging in secondary cell Battery pack 11A��11J series of cells 11 being had is the highest monitors. Consequently, it is possible to more effectively suppress the deterioration of series of cells 11, short service life.
And, in discharge process, the temperature of the secondary cell Battery pack 11C of power brick 1 is the highest in 10 secondary cell Battery pack 11A��11J. Therefore, by using electric discharge thermistor 14 to carry out the temperature monitoring of series of cells 11 in discharge process such that it is able to the temperature of the secondary cell Battery pack (being secondary cell Battery pack 11C in present embodiment) that the temperature in discharge process in secondary cell Battery pack 11A��11J series of cells 11 being had is the highest monitors. Consequently, it is possible to more effectively suppress the deterioration of series of cells 11, short service life.
And, power brick 1 possesses housing 10, described housing collecting series of cells 11, and it is formed with cooling air duct, described cooling air duct is for making cooling air flowing series of cells 11 cooled, secondary cell Battery pack 11A on the flow direction (arrow A of Fig. 1) of cooling air, the most downstream side being configured in 10 secondary cell Battery packs. Therefore, can on the direction (arrow A of Fig. 1) of the flowing at cooling air, secondary cell Battery pack 11A��11J that series of cells 11 has is configured in the secondary cell Battery pack 11A of most downstream side, namely, it is possible to the temperature of the highest secondary cell Battery pack of temperature in process of charging (being secondary cell Battery pack 11A in present embodiment) is monitored. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells 11, short service life.
And; the protection IC18 of power brick 1 uses electric discharge thermistor 14 to detect the temperature of series of cells 11 in discharge process; and limit, based on the temperature represented by electric discharge thermistor 14, the discharging current flowing through series of cells 11; therefore, it is possible to the temperature of the highest secondary cell Battery pack 11C of temperature in discharge process in secondary cell Battery pack 11A��11J series of cells 11 being had monitors, and the temperature based on secondary cell Battery pack 11C limits discharging current. Accordingly, it may be possible to more effectively suppress the deterioration of series of cells 11, short service life.
And, although power brick 1 has 10 secondary cell Battery pack 11A��11J, but utilize two thermal sensing elements, i.e. charging thermistor 13 and electric discharge thermistor 14 to monitor the temperature of series of cells 11, thus effectively suppress deterioration, the short service life of series of cells 11. Therefore, with use the thermal sensing element of more than three carry out series of cells 11 temperature monitoring structure compared with, it is possible to reduce manufacturing cost further.
Next, the power brick 100 of the 2nd enforcement mode of the present utility model is described with reference to Fig. 7. In addition, identical symbol is marked for the component identical with power brick 1, structure and omits the description, only different structures is described. Fig. 7 is the sketch chart representing power brick 100.
As shown in Figure 7, power brick 100 has charging thermistor 113 and electric discharge thermistor 114, and is configured to be connected with charging unit 600. Charging thermistor 113 closely configures with secondary cell Battery pack 11C, and electric discharge thermistor 114 closely configures with secondary cell Battery pack 11A.
Charging unit 600 has the cooling fan 600B producing cooling air, in the position suitable with the position being formed with air-supply mouth 2a of charging unit 2, is formed with suction port 600a. The cooling air direction A that the flow direction (hereinafter referred to as cooling air direction B) of the cooling air that cooling fan 600B produces and the cooling fan 2B of charging unit 2 produce is reverse, represents with arrow B in the figure 7.
Herein, the temperature distribution of the series of cells 11 during discharge and recharge in power brick 100 is described. In power brick 100, cooling air direction B is contrary with the cooling air direction A in power brick 1, and the shape of the cooling air duct being formed in housing 10 is different from the cooling air duct of power brick 1. Therefore, when not producing the electric discharge of cooling air, there is the tendency that temperature becomes the highest in secondary cell Battery pack 11A. And, secondary cell Battery pack 11C is positioned at the further downstream side of secondary battery battery 11A on the B of cooling air direction, and therefore when producing the charging of cooling air, secondary cell Battery pack 11C exists the high tendency of Temperature Ratio secondary cell Battery pack 11A. Secondary cell Battery pack 11C in power brick 100 is an example of the 1st secondary cell Battery pack in the utility model, and the secondary cell Battery pack 11A in power brick 100 is an example of the 2nd secondary cell Battery pack in the utility model.
In power brick 100, consider the temperature distribution of described series of cells 11, be there is the secondary cell Battery pack 11A of the high tendency of Temperature Ratio secondary cell Battery pack 11C and configure close to when discharging in electric discharge thermistor 114, charging thermistor 113 is existed the secondary cell Battery pack 11C of the high tendency of Temperature Ratio secondary cell Battery pack 11A and configure close to when charging. Consequently, it is possible to effectively suppress the deterioration of series of cells 11, short service life. Charging thermistor 113 is an example of the 1st thermal sensing element in the utility model, and electric discharge thermistor 114 is an example of the 2nd thermal sensing element in the utility model.
Power brick of the present utility model is not limited to described enforcement mode, it is possible to carry out various change in the practical novel main scope described in claim book. Such as, in power brick 1, charging unit 2 blocks charging current when charging based on the temperature represented by charging thermistor 13, power brick 1 blocks discharging current when discharging based on the temperature represented by electric discharge thermistor 14, but it is not limited to this, also following structure can be adopted, namely, when charging and when discharging, all the temperature represented by charging thermistor 13 and these two temperature of the temperature represented by electric discharge thermistor 14 being monitored, power brick 1 blocks charging current and discharging current based on higher temperature in two temperature. According to this kind of structure, then for also can tackling according to the rise in temperature being difficult to expect that the temperature distribution of series of cells 11 speculates, therefore, it is possible to really and more effectively suppress the deterioration of series of cells 11 (secondary cell Battery pack 11A��11J), short service life. Protection IC18 now is an example of the charging current limiting part in the utility model.
And; power brick 1 have employed following structure; namely; in process of charging, charging unit uses charging thermistor 13; limit, based on the temperature represented by charging thermistor 13, the charging current flowing through series of cells 11, but also can adopt following structure, namely; the protection IC18 of power brick 1 uses charging thermistor 13 to detect the temperature of series of cells 11 in process of charging, and limits, based on the temperature represented by charging thermistor 13, the charging current flowing through series of cells 11. According to this kind of structure, the temperature of the secondary cell Battery pack 11A that the temperature in process of charging in the secondary cell Battery pack 11A��11J then can series of cells being had is the highest monitors, and the temperature based on secondary cell Battery pack 11A limits charging current such that it is able to more effectively suppress deterioration, the short service life of series of cells 11. Protection IC18 now is an example of battery circuit limiting part of the present utility model.
And, power brick 1 have employed following structure, namely, process of charging is cooled by cooling air, and obstructed overcooling wind cools when discharging, but the structure that the utility model also can be applicable to be undertaken cooling by cooling air when discharging and obstructed overcooling wind cools when charging. That is, as long as adopting following structure, namely, it is contemplated that to the difference of the temperature distribution of series of cells during discharge and recharge, multiple secondary cell Battery packs series of cells being had are provided with charging thermistor and electric discharge thermistor.

Claims (11)

1. a power brick, it is characterised in that comprising:
Series of cells, has n secondary cell Battery pack;
External connecting, it is possible to the electronic device being connected to the charging unit that described series of cells can be charged and being driven by the electric discharge of described series of cells; And
K thermal sensing element, for detecting the temperature of described series of cells,
Described n secondary battery battery the 1st secondary cell Battery pack and the 2nd secondary cell Battery pack, described 2nd secondary cell Battery pack in discharge process temperature higher than described 1st secondary cell Battery pack and in process of charging temperature lower than described 1st secondary cell Battery pack
Described k thermal sensing element comprises the 1st thermal sensing element and the 2nd thermal sensing element, and described 1st thermal sensing element contacts with described 1st secondary cell Battery pack or closely configures, and described 2nd thermal sensing element contacts with described 2nd secondary cell Battery pack or closely configures,
Wherein n is the natural number of more than 3, and k is more than 2 and is less than the natural number of n.
2. power brick according to claim 1, it is characterised in that,
In process of charging, the temperature of described 1st secondary cell Battery pack is the highest in described n secondary cell Battery pack.
3. power brick according to claim 1 and 2, it is characterised in that,
In discharge process, the temperature of described 2nd secondary cell Battery pack is the highest in described n secondary cell Battery pack.
4. power brick according to claim 1 and 2, it is characterised in that,
Comprising housing further, described housing accommodates described series of cells, and is formed with cooling air duct, and for making, the cooling air described series of cells cooled flows described cooling air duct, and
Described 1st secondary cell Battery pack on the direction that described cooling air flows, the most downstream side being configured in described n secondary cell Battery pack.
5. power brick according to claim 1 and 2, it is characterised in that more comprise:
Charging current limiting part, in process of charging, it may also be useful to described 1st thermal sensing element detects the temperature of described series of cells, and based on the temperature represented by described 1st thermal sensing element, limits the electric current flowing through described series of cells.
6. power brick according to claim 1 and 2, it is characterised in that more comprise:
Discharging current limiting part, in discharge process, it may also be useful to described 2nd thermal sensing element detects the temperature of described series of cells, and limits, based on the temperature represented by described 2nd thermal sensing element, the electric current flowing through described series of cells.
7. power brick according to claim 1 and 2, it is characterised in that more comprise:
Battery circuit limiting part, use described 1st thermal sensing element and described 2nd thermal sensing element to detect the temperature of described series of cells, and based on temperature higher in the temperature represented by described 1st thermal sensing element and the temperature represented by described 2nd thermal sensing element, limit the electric current flowing through described series of cells.
8. power brick according to claim 1 and 2, it is characterised in that,
K is 2.
9. a power brick, it is characterised in that comprising:
Series of cells, has n secondary cell Battery pack;
Housing, accommodates described series of cells, and is provided with the 1st ventage importing air and the 2nd ventage discharging described air;
External connecting, it is possible to the electronic device being connected to the charging unit that described series of cells can be charged and being driven by the electric discharge of described series of cells; And
K thermal sensing element, for detecting the temperature of described series of cells,
A described thermal sensing element in described k thermal sensing element is configured near described 2nd ventage,
Wherein n is the natural number of more than 3, and k is more than 2 and is less than the natural number of n.
10. power brick according to claim 9, it is characterised in that,
By described n secondary cell Battery pack along from described 1st ventage till described 2nd ventage cooling air flowing direction and be configured in described housing,
A described thermal sensing element in described k thermal sensing element is configured in the direction of described cooling air flowing than being positioned near the described secondary cell Battery pack of the described further downstream side of secondary cell Battery pack of central authorities.
11. power brick according to claim 10, it is characterised in that,
Thermal sensing element described in another in described k thermal sensing element is configured near the described secondary cell Battery pack being positioned at central authorities in the direction of described cooling air flowing.
CN201520989318.7U 2015-03-31 2015-12-03 Battery pack Active CN205283173U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11955830B2 (en) 2021-04-27 2024-04-09 Techtronic Cordless Gp Battery temperature based tool power reduction

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3067860B1 (en) 2017-06-15 2021-04-16 Airbus Group Sas SYSTEM FOR CHARGING AT LEAST ONE BATTERY OF ACCUMULATORS OF A VEHICLE AND PROCESS FOR MANAGING THE RECHARGE OF SUCH AT LEAST ONE BATTERY
DE102017125128A1 (en) * 2017-10-26 2019-05-02 Peiker Acustic Gmbh & Co. Kg Battery assembly and telematics unit
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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008141951A (en) * 2003-12-08 2008-06-19 Ricoh Co Ltd Power supply unit and image forming apparatus
JP5196936B2 (en) * 2007-09-27 2013-05-15 三洋電機株式会社 Power supply for vehicle
JP2012009327A (en) 2010-06-25 2012-01-12 Hitachi Koki Co Ltd Battery pack and power tool having the same
JP2012175874A (en) * 2011-02-24 2012-09-10 Fujitsu Ltd Uninterruptible power supply device, and information processing system having the same
EP3043417B1 (en) * 2013-09-06 2018-05-02 Nissan Motor Co., Ltd Battery pack cooling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11955830B2 (en) 2021-04-27 2024-04-09 Techtronic Cordless Gp Battery temperature based tool power reduction

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