CN111416077A - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN111416077A CN111416077A CN202010019173.3A CN202010019173A CN111416077A CN 111416077 A CN111416077 A CN 111416077A CN 202010019173 A CN202010019173 A CN 202010019173A CN 111416077 A CN111416077 A CN 111416077A
- Authority
- CN
- China
- Prior art keywords
- battery pack
- battery
- core group
- channel
- electric core
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—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
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- 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
Abstract
The invention discloses a battery pack, comprising: the battery core group comprises a plurality of battery cells, and the battery cells are electrically connected to form the battery core group; the bracket is used for supporting the electric core group; the shell is used for accommodating the electric core group and the bracket; at least part of the battery cells are provided with phase change materials, and the phase change materials arranged on the two adjacent battery cells are mutually staggered in the axial direction of the battery cells. The battery pack has good heat dissipation effect and can avoid short circuit of internal circuits or electronic components of the battery pack.
Description
Technical Field
The present invention relates to a battery pack.
Background
With the wide application of electric tools, the functional requirements of users on the battery pack are more and more diversified, and the requirements are higher and higher.
On the one hand, a higher output voltage also means that the number of battery cells in the battery pack is increased, and due to the existence of internal resistance of the battery cells, more battery cells generate more heat during charging and discharging, so that the service life of the battery is affected, and even serious accidents such as explosion and the like are caused. Particularly, when the battery pack discharges, the larger the discharge current is, the faster the temperature rise is, and when a large current discharges, if the heat is not timely and effectively dissipated, the temperature rises to a very high temperature in a short time, and over-temperature/over-discharge protection is triggered, so that the electric tool frequently executes a shutdown protection measure, thereby bringing interruption and trouble in operation. Therefore, it is necessary to perform timely and effective heat dissipation on the battery cell.
On the other hand, because in the heat dissipation design of battery package, need set up air intake and air outlet on the battery package usually, such vent can make during external dust, metal debris etc. get into the battery package, cause electronic components or circuit in the battery package to take place the short circuit easily, damage the battery package. Therefore, it is also necessary to solve the problem of the battery pack that short circuits occur due to dust, metal debris, and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a battery pack which has a good heat dissipation effect and can prevent an internal circuit or an electronic component of the battery pack from being short-circuited.
In order to achieve the above object, the present invention adopts the following technical solutions:
a battery pack, comprising: the battery core group comprises a plurality of battery cells, and the battery cells are electrically connected to form the battery core group; the bracket is used for supporting the electric core group; the shell is used for accommodating the electric core group and the bracket; at least part of the battery cells are provided with phase change materials, and the phase change materials arranged on the two adjacent battery cells are mutually staggered in the axial direction of the battery cells.
Optionally, the phase change material is configured in a ring shape to be sleeved on the outer surface of the battery cell. The phase-change material is encapsulated on the battery cell by an encapsulation layer.
Optionally, the length of the phase change material in the axial direction of the cell is less than 50% of the axial length of the cell.
Optionally, the housing is formed with an air inlet and an air outlet; the bracket is formed with at least one passage for guiding an airflow entering from the intake opening toward the outlet opening.
Optionally, the electric core group comprises a first electric core group and a second electric core group, and the two air inlets comprise: the first air inlet is arranged near the first electric core group; and the second air inlet is formed near the second electric core group.
Optionally, the stent comprises: a first bracket for supporting the first battery pack, the first bracket including a first half and a second half; a second bracket for supporting the second cell pack, the second bracket including a third half and a fourth half; the second half part and the third half part are arranged adjacently, at least one first channel is arranged on the second half part, at least one second channel is arranged on the third half part, and the number of the first channels corresponds to the number of the second channels one to one; the first channel and the second channel are correspondingly arranged so that the airflow from the first electric core group can flow through the first channel and the second channel and then flow into the second electric core group.
Optionally, the battery pack further includes: the first air duct is used for enabling the airflow passing through the first air duct to flow through a first air inlet, the first electric core group, the first channel, the second electric core group and the air outlet; and the air flow passing through the second air duct flows through the second air inlet, the second battery pack and the air outlet.
Optionally, the battery pack further includes: a screen disposed between the first channel and the second channel, or disposed in at least one of the first channel and the second channel.
Optionally, the housing is formed with a coupling portion for mounting the battery pack to the power tool, the coupling portion being provided with a battery pack air outlet; the electric tool comprises a battery pack combining part which is used for being matched with the combining part of the battery pack, the battery pack combining part of the electric tool is provided with an electric tool air inlet, and the electric tool air inlet and the battery pack air inlet are correspondingly arranged, so that the battery pack flows through the battery pack air outlet and enters the electric tool after the electric tool air inlet.
The battery pack has good heat dissipation effect and can avoid short circuit of internal circuits or electronic components of the battery pack.
Drawings
Fig. 1 is a perspective view of a battery pack;
fig. 2 is a top view of the battery pack of fig. 1;
fig. 3 is a bottom view of the battery pack of fig. 1;
fig. 4 is an internal structural view of the battery pack shown in fig. 1;
FIG. 5 is a structural view of an electric core pack of the battery pack shown in FIG. 1;
fig. 6 is a structural view of an electric core pack in another view of the battery pack of fig. 1;
fig. 7 is an exploded view of the electric core pack of the battery pack shown in fig. 1;
FIG. 8 is a partial structural view of a bracket of the electric core pack shown in FIG. 7;
fig. 9 is a sectional view of the battery pack shown in fig. 2 in a direction a;
fig. 10 is a perspective view of an electric power tool according to an embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Referring to fig. 1 to 4, the battery pack 10 mainly includes a casing 110 and a core pack 120 (fig. 4) accommodated in the casing 110, wherein the core pack 120 includes a plurality of battery cells 121, and the battery cells 121 are electrically connected to form the core pack 120.
The battery pack 10 further includes a coupling portion 111 at least partially formed on a surface of the housing 110, the coupling portion 111 cooperating with a battery pack coupling portion of the power tool 20 (fig. 10) or a charging device for detachably mounting the battery pack 10 to the power tool 20 to supply power to the power tool 20 or to the charging device to enable the charging device to charge the battery pack 10.
The battery pack 10 further includes a latch mechanism 170 that at least partially protrudes from a surface of the housing 110 for securing the battery pack 10 to the power tool 20 or charging device and for removing the battery pack 10 from the power tool 20 or charging device. The latch mechanism 170 includes an operating device 171 and a locking member 172, the operating device 171 is used by a user, and the locking member 172 is associated with the operating device 171 for fixing the battery pack 10 to the power tool 20 or the charging device.
Referring to fig. 4, the battery pack 10 further includes a battery pack connection terminal 130 provided in the battery pack engagement portion 111 for connection with an external device such as the electric power tool 20 and a charging device to electrically connect the battery pack and the external device.
The battery pack connecting terminal 130 includes a battery pack positive power terminal B + electrically connected to the positive electrode of the electric core pack 120 and a battery pack negative power terminal B-electrically connected to the negative electrode of the electric core pack 120.
Optionally, the battery pack connection terminal 130 further includes a first battery pack terminal D and a second battery pack terminal T, wherein the first battery pack terminal D is a communication terminal for communicating with the electric tool 20 or the charging device to transmit data, and the second battery pack terminal T is a temperature terminal for the electric tool 20 or the charging device to obtain the temperature of the battery pack 10.
Referring to fig. 4 to 5, the battery pack 120 is accommodated in the housing 110, the battery pack 120 includes a plurality of battery cells 121, and the battery cells 121 are electrically connected to form the battery pack 120. The electric connection between the battery cells 121 is realized through the connecting assembly 122. The battery cells 121 are supported by a bracket 160 disposed in the case 110 and fixed in the case 110 of the battery pack 10.
Alternatively, the battery pack 10 has a voltage of at least 48V or more to meet the higher voltage requirements of the dc power tool 20. Since the voltage of the battery pack 10 is large, the number of battery cells in the battery pack 10 is large. If the nominal voltage of the battery cell is 4V, if a larger output current requirement is to be met, the battery core pack 120 may include two series modules, each series module includes 12 battery cells 121 connected in series, each series module has 48V voltage, and the two series modules are connected in parallel to form the battery core pack 120.
Referring to fig. 5, as an alternative, the electric core pack 120 includes a first electric core pack 120a and a second electric core pack 120b, and the holder 160 includes a first holder 161 and a second holder 162, each of which includes two halves. The first frame 161 is used for supporting the first electric core set 120a, and the second frame 162 is used for supporting the second electric core set 120 b.
Wherein the first bracket 161 includes a first half 161a and a second half 161b, and the second bracket 162 includes a third half 162a and a fourth half 162 b. Two halves of each bracket are respectively disposed at both ends of each electric core pack 120, and the second half 161b of the first bracket 161 and the third half 162a of the second bracket 162 are adjacent to each other with a gap therebetween, so as to facilitate heat dissipation by the circulating air flow. Each bracket is arranged into two independent halves, which can reduce the area of the electric core assembly 120 encapsulated by the bracket 160 to the maximum extent, and is beneficial to heat dissipation. Wherein second half 161b is disposed adjacent to third half 162 a.
Due to the existence of the internal resistance of the battery cell, the battery cell 121 generates heat during charging and discharging, and when the heat is accumulated to a certain degree, the service lives of the battery cell 121 and the battery pack 10 are affected, and even serious accidents such as explosion and the like are caused. When the battery pack 10 is discharged, the larger the discharge current is, the faster the temperature rise is, and particularly, when a large current is discharged, if the heat is not timely and effectively dissipated, the temperature rises to an extremely high temperature in a short time, and over-temperature/over-discharge protection is triggered, so that the electric tool 20 frequently performs shutdown protection measures, thereby causing discontinuity and trouble in operation.
In this embodiment, at least a portion of the battery cell 121 is provided with a phase change material 123, and the phase change material 123 is encapsulated on the battery cell 121 by an encapsulation layer. The phase-change material 123 stores heat by utilizing the property that a large amount of heat needs to be absorbed or emitted when a substance undergoes phase change, and has the advantages of high heat storage density, small volume, high heat efficiency, small corrosivity, no toxicity and high stability.
Optionally, the phase change material 123 is configured in a ring shape to be sleeved on the outer surface of the battery cell 121. In the prior art, in order to make the structure of the battery pack 10 more compact, the arrangement of the battery cells 121 is more compact, and the gap between adjacent battery cells 121 is very small or zero, which is not favorable for heat dissipation of the battery cells 121. Referring to fig. 5 and 6, in the present embodiment, the phase change materials 123 disposed on two adjacent battery cells 121 are offset from each other in the axial direction of the battery cells 121. The axial direction of the cell 121 refers to the direction of the line connecting the two electrodes of the cell 121. The advantage of this arrangement is that the phase change material 123 protruding from the outer surface of the battery cell 121 generates a gap between two adjacent battery cells 121, so that more airflow can flow through, and thus more efficient heat dissipation can be performed on the battery cells 121.
Alternatively, the length of the phase change material 123 in the axial direction of the cell 121 is less than 50% of the axial length of the cell 121. This has the advantage that the phase change material 123 can coat the battery cell 121 to a greater extent to facilitate heat dissipation of the battery cell 121, and at the same time, the phase change materials 123 on two adjacent battery cells 121 can be staggered from each other in the axial direction of the battery cells 121.
In order to better dissipate heat of the battery cell 121, the battery pack 10 further includes an air inlet 113 (fig. 3) and an air outlet 112 (fig. 2), an air duct is formed between the air inlet 113 and the air outlet 112, and air flow entering from the air inlet 113 can be discharged from the air outlet 112 through the air duct.
Alternatively, the intake port 113 may be disposed at a side of the upper surface of the housing 110 near the combining portion 112, and the exhaust port 112 may be disposed at the bottom of the housing 110. Accordingly, a ventilation opening is correspondingly formed at the battery pack coupling portion of the power tool 20 or the charging device, and corresponds to the air outlet 112 of the battery pack 10 when the battery pack 10 is mounted to the power tool 20 or the charging device, and the fan in the power tool 20 or the charging device can suck the air flow from the air inlet 113 of the battery pack 10 through the ventilation opening, and the air outlet 112 of the battery pack 10 and the air flow is discharged from the air outlet 112 of the battery pack 10, so that the heat of the interior of the battery pack 10 is dissipated.
In this embodiment, the battery pack 10 is provided with two air inlets 113, which are a first air inlet 113a and a second air inlet 113b, respectively, for enabling more air flows to enter the battery pack 10 to dissipate heat of the battery cell 121 more efficiently. The first air inlet 113a is disposed on the casing 110 below the first electric core assembly 120a and is mainly used for air flow through heat dissipation of the first electric core assembly 120a, and the second air inlet 113b is disposed on the casing 110 below the second electric core assembly 120b and is mainly used for air flow through heat dissipation of the second electric core assembly 120 b. Alternatively, two air inlets are respectively disposed at two positions of the bottom of the battery pack 10 near the air outlet 112 and far from the air outlet 112, and alternatively, the second air inlet 113b is closer to the air outlet 112 than the first air inlet 113 a.
Referring to fig. 7 and 8, the supporter 160 is formed with at least one passage 163 for guiding the air current entering from the air inlet 113 toward the air outlet 112, so that the air current entering from the air inlet 113 flows more sufficiently through each of the electric core packs 120 for dissipating heat for each of the electric core packs 120.
Alternatively, the passages 163 are provided on two adjacent halves of the first bracket 161 and the second bracket 162, and the passages provided on the half of the first bracket 161 correspond to the passages provided on the half of the second bracket 162 in a one-to-one correspondence. Specifically, at least one first channel is disposed on the second half 161b of the first bracket 161, at least one second channel is disposed on the third half 162a of the second bracket 162, the number of the first channels corresponds to the number of the second channels, and the first channels and the second channels are correspondingly disposed so that the airflow from the first cell group 120a can flow into the second cell group 120b after flowing through the first channels and the second channels. Therefore, the problem that the airflow in the first electric core group 120a cannot stably and effectively flow to the air outlet 112 because the air outlet 112 is arranged at a position far away from the first air inlet 113a can be avoided.
Referring to fig. 9, with such an arrangement, the air flow entering from the first air inlet 113a flows through the gaps between the cells 121 of the first cell group 120a, enters into the second cell group 120b through the passage 163, and then flows to the air outlet 112 through the gaps between the cells 121 of the second cell group 120b, so as to be discharged from the air outlet 112, and the path through which the air flow flows is referred to as a first air duct, that is, the air flow passing through the first air duct flows through the first air inlet 113a, the first cell group 120a, the first passage, the second cell group 120b, and the air outlet 112. The first air duct can be the first electric core assembly 120a, and meanwhile, since the airflow flowing through the first air duct also flows through the second air duct, the first air duct can also dissipate heat for the second electric core assembly 120 b. The airflow entering from the second air inlet 113b flows through the gaps between the electric cells 121 of the second electric core group 120b and then flows to the air outlet 112, so as to be discharged from the air outlet 112, and the path through which the airflow flows is called a second air duct, that is, the airflow passing through the second air duct flows through the second air inlet 113b, the second electric core group 120b and the air outlet 112, and the second air duct can dissipate heat for the second electric core group 120 b. Of course, the air flow passing through the first air duct and the second air duct can also dissipate heat of other electronic components inside the battery pack 10. The battery pack 10 of the present invention has two heat dissipation channels, i.e., a first air channel and a second air channel, which are merged into one air channel in the second electric core pack 120 b.
The shape of the channels 163 may be any shape, and the number of the channels 163 may be any number, without any limitation. Optionally, the battery pack 10 further comprises a filter screen disposed between the first channel and the second channel, or disposed in at least one of the first channel and the second channel. The filter screen serves to block and collect dust, metal debris, etc. in the battery pack 10 in the passage 163.
From this, the setting of passageway 163 not only can be used for the air current that gets into in the battery package 10 from air intake 113 to the air outlet 112 guide, makes the air current in the battery package 10 can flow according to established track, and can not scurry, makes the radiating effect of battery package 10 better and high-efficient, can also concentrate the foreign matter such as dust, metal debris of battery package 10 in passageway 163 simultaneously, and can not fall between electric core 121 or on electric core coupling assembling 122 or circuit board 140, causes electric core 121 short circuit or electronic components short circuit.
Referring to fig. 10, a battery pack and a power tool combination as an embodiment. The power tool 20 includes: a housing 210; a tool attachment (not shown) for performing the function of the power tool 20, which in the case of a circular saw is a saw blade; and a motor 220 accommodated in the housing 210 for outputting power to drive the tool attachment to operate. The power tool 20 is powered using the battery pack 10, and the battery pack 10 is detachably attached to the power tool 20. The power tool 20 is provided with a battery pack coupling portion 230 for cooperating with the coupling portion 111 of the battery pack to mount the battery pack 10 on the power tool 20, the above-mentioned air outlet 112 is provided on the coupling portion 111 of the battery pack 111, and a power tool air inlet (not shown) is correspondingly provided on the battery pack coupling portion 230 of the power tool 20, and when the battery pack 10 is mounted on the power tool 20, an incoming air flow from the air inlet 113 of the battery pack 10 enters the power tool through the air outlet 112 to dissipate heat through the power tool 20. The power tool 10 is further provided with a power tool air outlet (not shown), and the air flow flowing into the power tool 20 from the battery pack 10 is finally exhausted from the power tool air outlet on the power tool 20, so that the power tool 20 can simultaneously dissipate heat from the battery pack 10 and the power tool 20. In order to enhance the heat dissipation effect, a fan, more specifically, a centrifugal fan may be disposed in the power tool 20, and an air flow is sucked from the air inlet 113 of the battery pack 10, flows through the electric core pack 120 of the battery pack 10, passes through the air outlet 112 of the battery pack 10 and the power tool of the power tool, then flows through the power tool, and finally is discharged from the air outlet of the power tool by the suction action of the centrifugal fan.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. A battery pack, comprising:
the battery core group comprises a plurality of battery cells, and the battery cells are electrically connected to form the battery core group;
the bracket is used for supporting the electric core group;
the shell is used for accommodating the electric core group and the bracket;
at least part of the battery cells are provided with phase change materials, and the phase change materials arranged on the two adjacent battery cells are mutually staggered in the axial direction of the battery cells.
2. The battery pack according to claim 1,
the phase change material is configured in a ring shape to be sleeved on the outer surface of the battery cell.
3. The battery pack according to claim 1,
the phase-change material is encapsulated on the battery cell by an encapsulation layer.
4. The battery pack according to claim 1,
the length of the phase change material in the axial direction of the cell is less than 50% of the axial length of the cell.
5. The battery pack according to claim 1,
the shell is provided with an air inlet and an air outlet;
the bracket is formed with at least one passage for guiding an airflow entering from the intake opening toward the outlet opening.
6. The battery pack according to claim 5,
the electric core group includes first electric core group and second electric core group, two air intakes include:
the first air inlet is arranged near the first electric core group;
and the second air inlet is formed near the second electric core group.
7. The battery pack according to claim 6,
the bracket includes:
a first bracket for supporting the first battery pack, the first bracket including a first half and a second half;
a second bracket for supporting the second cell pack, the second bracket including a third half and a fourth half;
the second half part and the third half part are arranged adjacently, at least one first channel is arranged on the second half part, at least one second channel is arranged on the third half part, and the number of the first channels corresponds to the number of the second channels one to one; the first channel and the second channel are correspondingly arranged so that the airflow from the first electric core group can flow through the first channel and the second channel and then flow into the second electric core group.
8. The battery pack according to claim 7,
further comprising:
the first air duct is used for enabling the airflow passing through the first air duct to flow through a first air inlet, the first electric core group, the first channel, the second electric core group and the air outlet;
and the air flow passing through the second air duct flows through the second air inlet, the second battery pack and the air outlet.
9. The battery pack according to claim 7,
further comprising:
a screen disposed between the first channel and the second channel, or disposed in at least one of the first channel and the second channel.
10. The battery pack according to claim 1,
the housing is formed with a joint portion for mounting the battery pack to the electric tool, the joint portion being provided with a battery pack air outlet;
the electric tool comprises a battery pack combining part which is used for being matched with the combining part of the battery pack, the battery pack combining part of the electric tool is provided with an electric tool air inlet, and the electric tool air inlet and the battery pack air inlet are correspondingly arranged, so that the battery pack flows through the battery pack air outlet and enters the electric tool after the electric tool air inlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015000 | 2019-01-08 | ||
| CN2019100150001 | 2019-01-08 |
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| CN111416077A true CN111416077A (en) | 2020-07-14 |
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| CN202010019623.9A Pending CN111409044A (en) | 2019-01-08 | 2020-01-08 | Combination of battery pack and electric tool |
| CN202010019173.3A Pending CN111416077A (en) | 2019-01-08 | 2020-01-08 | Battery pack |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010019623.9A Pending CN111409044A (en) | 2019-01-08 | 2020-01-08 | Combination of battery pack and electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114335863A (en) * | 2020-09-30 | 2022-04-12 | 南京泉峰科技有限公司 | Battery pack |
| CN114335853A (en) * | 2020-09-30 | 2022-04-12 | 南京泉峰科技有限公司 | Battery pack |
| CN114361674A (en) * | 2020-09-30 | 2022-04-15 | 南京泉峰科技有限公司 | Battery pack |
| CN114551926A (en) * | 2020-11-25 | 2022-05-27 | 浙江臻泰能源科技有限公司 | High-temperature fuel cell stack design |
| WO2022121142A1 (en) * | 2020-12-11 | 2022-06-16 | 深圳市格瑞普电池有限公司 | Vehicle-mounted emergency power supply |
| WO2023024929A1 (en) * | 2021-08-26 | 2023-03-02 | 江苏东成工具科技有限公司 | Battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115528757A (en) * | 2021-06-24 | 2022-12-27 | 南京泉峰科技有限公司 | Electric tool |
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