US20230223634A1 - Battery park - Google Patents
Battery park Download PDFInfo
- Publication number
- US20230223634A1 US20230223634A1 US18/124,461 US202318124461A US2023223634A1 US 20230223634 A1 US20230223634 A1 US 20230223634A1 US 202318124461 A US202318124461 A US 202318124461A US 2023223634 A1 US2023223634 A1 US 2023223634A1
- Authority
- US
- United States
- Prior art keywords
- battery pack
- upper housing
- housing
- cavity
- battery
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
Definitions
- Removable, rechargeable battery packs are commonly used to power cordless power tools such as construction tools, e.g. drills, circular saws and reciprocating saws and landscaping tools, e.g. string trimmers, hedge trimmers and chain saws. These uses typically result in the battery packs being exposed to various environmental situations. Particularly, the battery packs are exposed to rain, snow and dust. As is well known, rain, snow and dust can have a deleterious effect on the battery packs, particularly the battery cells and the electronic components of the battery packs.
- Prior art battery packs have been designed to redirect water and dust and otherwise prevent the water and dust from impacting the cells and the electronics.
- One battery pack has included a discrete component added to the battery pack to create a separate housing for the latch. This component assists in keeping water from entering the cell cavity.
- the latch receptacle is not truly sealed from the cell cavity.
- this pack does not address other paths of ingress for water and as such, does not truly seal the battery cells and electronics from water.
- the present invention provides a battery pack that is fully seals the battery cell cavity and the battery electronics from water.
- An aspect of the present invention includes sealed battery pack.
- the battery pack includes various features to create a sealed core pack cavity holding the battery cells and various battery pack electronics.
- the features include a first O-ring at a mating/parting interface between an upper housing and a lower housing, a sealing plate and a second O-ring at an interface between the upper housing and the sealing plate and an integral cavity for receiving a latch.
- Advantages may include one or more of the following: preventing water and other contaminants from reaching the battery cells and/or battery pack electronics.
- FIG. 1 is a rear, left side isometric view of a first exemplary embodiment of a battery pack of the instant application.
- FIG. 2 is a front, left side isometric view of the battery pack of FIG. 1 .
- FIG. 3 is a front, right side isometric view of the battery pack of FIG. 1 .
- FIG. 4 is a right side elevation view of the battery pack of FIG. 1 .
- FIG. 6 is a top plan view of the battery pack of FIG. 1 .
- FIG. 8 is a rear elevation view of the battery pack of FIG. 1 .
- FIG. 9 is a bottom plan view of the battery pack of FIG. 1 .
- FIG. 10 is a section view taken along line A-A of the battery pack of FIG. 6 .
- FIG. 11 is an isometric of a component subassembly of the battery pack of FIG. 1 .
- FIG. 12 is a side view of the component subassembly of FIG. 11 .
- FIG. 13 is a top view of the component subassembly of FIG. 11 and a sealing component of the instant application prior to assembly.
- FIG. 14 is an isometric of the component subassembly and sealing component of FIG. 13 after assembly.
- FIG. 15 is an isometric view of the component subassembly and sealing component of FIG. 14 after application of a sealant.
- FIG. 17 is an isometric of the component subassembly, sealing component and core pack of FIG. 16 after assembly.
- FIG. 18 is an isometric view of the assembly of FIG. 17 and a lower housing of the battery pack of FIG. 1 prior to assembly.
- FIG. 19 is an isometric view of the assembly of FIG. 18 and the lower housing of the battery pack of FIG. 1 after assembly.
- FIG. 20 is a top view of the assembly of FIG. 18 and the lower housing of the battery pack of FIG. 1 after assembly.
- FIG. 21 is a front, left side isometric view of an upper housing of the battery pack of FIG. 1 .
- FIG. 22 is a front, right side isometric view of the upper housing of FIG. 21 and a latch subassembly of the battery pack of FIG. 1 prior to assembly.
- FIG. 24 is a front, left side isometric interior view of the upper housing of FIG. 21 .
- FIG. 25 is a front, right side isometric interior view of the upper housing of FIG. 21 and a pair of O-rings prior to assembly.
- FIG. 26 is a left side elevation view of the assembly of FIG. 19 and the upper housing of FIG. 25 after assembly of the upper housing and the O-rings prior to assembly.
- FIG. 28 is a section view taken along line A-A of the battery pack of FIG. 6 during and after a pressure release
- FIG. 29 is a front, left side isometric view of an alternate embodiment of the battery pack of FIG. 1 .
- FIG. 30 is a top view of the battery pack of FIG. 29 .
- FIGS. 31 A and 31 B are section views taken along line A-A of the battery pack of FIG. 30 before and after a pressure release.
- FIG. 32 is a front, left side isometric interior view of an alternate embodiment of the upper housing of the battery pack of FIG. 1 .
- FIG. 33 is a front, left side isometric view of an alternate embodiment of the lower housing of the battery pack of FIG. 1 .
- FIGS. 34 A and 34 B are section views taken along line B-B of the battery pack of FIG. 6 in the embodiment of FIG. 33 before and after a pressure release.
- FIG. 36 is a top view of the battery pack of FIG. 35 .
- FIG. 37 is a section view along line A-A of the battery pack of FIG. 36 .
- FIG. 38 is a front, right side isometric view of the upper housing of the battery pack of FIG. 35 .
- FIG. 40 is a top view of the upper housing of FIG. 38 .
- FIG. 42 is a front, left side isometric interior view of the upper housing of FIG. 40 .
- FIG. 43 is a rear, right side isometric view of the lower housing and core pack assembly of the battery pack of FIG. 35 .
- FIG. 44 a rear, left side exploded isometric view of the lower housing and core pack assembly of FIG. 43 .
- FIG. 46 is an isometric view of a terminal block subassembly of the battery pack of FIG. 35 .
- FIG. 47 is a front, right side isometric view of a third exemplary embodiment of a battery pack of the instant application.
- FIG. 48 is a rear, left side isometric view of the battery pack of FIG. 47 .
- FIG. 49 is a bottom plan view of the battery pack of FIG. 47 .
- FIG. 50 is a top plan view of the battery pack of FIG. 47 .
- FIG. 51 is a left side elevation view of the battery pack of FIG. 47 .
- FIG. 52 is a right side elevation view of the battery pack of FIG. 47 .
- FIG. 53 is a front elevation view of the battery pack of FIG. 47 .
- FIG. 54 is a rear elevation view of the battery pack of FIG. 47 .
- FIG. 55 is a front, right side isometric view of the upper housing of the battery pack of FIG. 47 and an electronics module assembly assembled together.
- FIG. 56 is a side view of the assembly of FIG. 55 .
- FIG. 57 is a section view of the assembly of FIG. 55 taken along section line A-A of FIG. 50 .
- FIG. 58 is a section view of the assembly of FIG. 57 including a first volume of low pressure molded material.
- FIG. 59 is a section view of the assembly of FIG. 58 including the first volume of low pressure molded material and a second volume of low pressure molded material.
- FIG. 60 is a front, right side isometric view of the assembly of FIG. 59 and an O-ring prior to assembly.
- FIG. 61 is a front, right side isometric view of the assembly of FIG. 59 after the O-ring and a core pack have been assembly with the upper housing.
- FIG. 63 is a section view along section line A-A of FIG. 50 .
- FIG. 64 is a bottom isometric view of the of the battery pack of FIG. 47 .
- the battery pack 100 includes an upper housing 102 and a lower housing 104 .
- the upper and lower housings 102 , 104 are assembled together at a mating or parting line 106 .
- the battery pack 100 also includes a latch 108 .
- the latch 108 enables the battery pack 100 to be coupled to and decoupled from an associated power tool, as is well known in the industry.
- the latch 108 includes a user operable feature, referred to as a button 110 and a hook 112 that mates with a corresponding catch of the power tool.
- the upper housing 102 includes a space to hold the latch 108 .
- the upper housing 102 also includes an opening for allowing the hook 112 to move into and out of the battery pack 100 for coupling and decoupling to the power tool.
- the upper housing 102 also includes a plurality of terminal slots 114 .
- the battery pack 100 includes a plurality of terminals 116 that are coupled to a set of battery cells 118 .
- the set of terminals 116 include a subset of power terminals 116 a and a subset of signal terminals 116 b.
- the power terminals 116 a enable power to be drawn from the battery cells 118 to drive the power tool and to be supplied to the battery cells 118 from a charger to charge the battery cells 118 .
- the signal terminals 116 b provide information to the power tool and/or charger regarding various characteristics of the battery cells 118 .
- the terminals slots 114 allow for corresponding terminals of the power tool and charger to enter the battery housing 102 / 104 and mate with the battery terminals 116 .
- the parting line 106 , the space to hold the latch 108 and the opening for the hook 112 , and the terminal slots 114 present openings to the battery housing 102 / 104 for water, dust or other contaminants to enter the battery pack 100 and access the battery cells 118 and/or the battery electronics 120 . This can have serious deleterious effects on the battery cells 118 and/or the battery electronics 120 .
- the present invention provides solutions to prevent water from entering the battery pack 100 at these three locations.
- the battery pack 100 includes a tongue and groove configuration and an O-ring between the tongue and groove at the parting line.
- the battery pack includes a plurality of walls formed integrally with the housing to create cavity that is completely sealed from the cavity that holds the battery cells and the battery electronics.
- the battery pack includes a sealing plate and a tongue and groove configuration between the sealing plate and the upper housing to seal the cavity that holds the battery cells and the battery electronics from the terminal slots 114 .
- the battery pack includes sealants (or sealing materials) to seal the cavity that holds the battery cells and the battery electronics from the terminal slots 114 .
- the battery pack includes an upper housing and a lower housing.
- Each of the housings is formed using an injection molding process as is well known in the industry.
- the upper and lower housings 102 , 104 are assembled together to form the battery pack housing.
- the upper and lower housings 102 , 104 are typically held together using a plurality of fasteners, such as screws.
- the upper and lower housing 102 , 104 meet at the parting/mating line 106 .
- Each of the upper and lower housings 102 , 104 include a surface that mates with the corresponding surface of the other housing.
- the lower housing 104 formed during the injection molding process—includes a first tongue 122 and the upper housing 102 —formed during the injection molding process—includes a first groove 124 .
- a first O-ring 126 is placed in the first groove 124 .
- the upper housing 102 and the lower housing 104 are then assembled.
- FIG. 27 A when the upper housing 102 and the lower housing 104 are assembled, a seal is created at the parting line 106 between a core pack cavity 128 and the air outside the battery pack 100 .
- Fasteners such as screws, are used to hold the lower housing 104 and upper housing 102 together and maintain the seal.
- the battery pack 100 includes a sealing plate 162 to seal the core pack cavity 128 (also referred to generally as a sealed cavity) in the space where water would enter the battery pack 100 through the terminal slots 114 .
- the battery pack 100 includes an electronics subassembly 134 as shown in FIGS. 11 and 12 .
- the electronics subassembly 134 includes a set of terminals 116 held in a terminal housing 136 —together forming a terminal block 138 .
- a terminal printed circuit board (PCB) 140 is attached to a rear side of the terminal housing 136 .
- the plurality of terminals 116 are connected to the terminal PCB 140 .
- the electronics subassembly 134 also includes a pair of power lines 142 (wires). One of the power lines 142 is connected to a positive (+) power terminal 116 a 1 and one of the power lines is connected to a negative ( ⁇ ) power terminal 116 a 2 .
- the terminal PCB 140 is connected to a main PCB 144 by a plurality of connection wires 146 .
- the connection wires 146 are connected to the plurality of terminals 116 by traces on the terminal PCB 140 .
- the electronics subassembly 134 also includes a plurality of sense wires 148 . At one end, the sense wires 148 are connected to the main PCB 144 and at another end the sense wires 148 will be connected to intra-cell battery straps 150 to provide intra-cell voltages to the main PCB 144 and the signal terminals 116 b.
- the sense wires 148 are connected to the connection wires 146 by traces on the main PCB 144 .
- the electronics subassembly 134 also includes a state of charge (SOC) indicator 152 .
- the SOC indicator 152 includes an SOC PCB 154 , an activation button 156 , a plurality of LEDs 158 and other components.
- the SOC PCB 154 is connected to the main PCB 144 by a pair of wires 160 .
- the battery pack includes a sealing plate 162 .
- the sealing plate 162 is created through an injection molding process.
- the sealing plate 162 may be made of the same material as the upper and lower housings 102 , 104 .
- the sealing plate 162 includes a sealing plate channel 164 .
- the sealing plate channel 164 allows the sealing plate 162 to be assembled with the electronics subassembly 134 .
- the sealing plate channel 164 receives the connection wires 146 when the sealing plate 162 is combined with the electronics subassembly 134 , as indicated by the arrow.
- the sealing plate 162 also includes a pair of sealing plate holes 166 .
- the sealing plate holes 166 allow for the power wires 142 to be threaded through the sealing plate 162 .
- the sealing plate 162 is also formed/configured with a second tongue 168 along a perimeter of the sealing plate 162 . As illustrated in FIGS. 13 and 14 , the sealing plate 162 is slide onto/over the main PCB 144 such that the connection wires 146 are positioned in the sealing plate channel 164 when complete and the power lines 142 are threaded through the sealing plate holes 166 .
- a sealant 170 such as RTV is applied to the sealing plate channel 164 and the sealing plate holes 166 .
- This provides a solid sealing plate 162 (which will serve to create a seal between the housing terminals slots 114 and the core pack cavity 128 ).
- the core pack 172 includes at least a plurality of battery cells 118 , a battery cell holder 174 and a plurality of battery straps 176 .
- FIG. 17 illustrates the electronics subassembly 134 and sealing plate 162 assembled onto the core pack 172 .
- the sense lines 148 are connected to intra-cell battery straps 176 b (by welding or soldering or other fixing method) and the power lines 142 are connected to the power battery straps 176 a.
- the core pack 172 , electronics subassembly 134 and sealing plate 162 are assembled with the lower housing 104 .
- FIGS. 19 and 20 illustrate the core pack 172 , electronics subassembly 134 and sealing plate 162 assembled with the lower housing 104 .
- the upper housing 102 is formed with a second groove 178 and a second O-ring 180 is assembled into the second groove 178 .
- a seal is formed between the upper housing 102 and the sealing plate 162 by the second O-ring 180 abutting with the second tongue 168 .
- This is similar to the seal that is formed between the upper housing 102 and the lower housing 104 by the first O-ring 126 and the first tongue 124 , illustrated in FIG. 27 A .
- first and second grooves 124 , 178 could be formed on the lower housing 104 and the sealing plate 162 , respectively and the first and second tongues 122 , 168 could be formed on the upper housing 102 with the first and second O-rings 126 , 180 being assembled into the first and second grooves 124 , 178 .
- the battery pack of the instant application includes a latch receiving cavity/volume 182 .
- the latch receiving cavity 182 is created by a plurality of walls integrally formed in the upper housing 102 .
- the plurality of latch receiving cavity walls are formed during the injection molding process of the upper housing 102 .
- the upper housing 102 includes a first (bottom) wall 184 , a second (side) wall 186 , a third (side) wall 188 , and fourth (rear) wall 190 .
- the second, third and fourth walls 186 , 188 , 190 meet the bottom wall 186 .
- these four walls define a cavity/volume 182 in which the latch 108 is received.
- the cavity/volume 182 formed by these walls is sealed from the core pack cavity 128 . This seal prevents water (and other contaminants) that enters the latch cavity/volume 182 from entering the core pack cavity 128 . As such, the battery cells 118 will not be negatively affected by such water (and other contaminants).
- the foregoing describes the various features included in the battery pack 100 to seal the core pack cavity 128 and the battery electronics 120 and prevent water (and other contaminants) from negatively affecting the battery cells 118 and the battery electronics 120 .
- the battery pack 100 includes an upper housing 102 and a lower housing 104 .
- the battery pack 100 includes a first tongue 122 on the lower housing 104 , a first groove 124 on the upper housing 102 and a first O-ring 126 positioned between the first tongue 122 and the first groove 124 ; a second tongue 168 positioned on the sealing plate 162 , a second groove 178 on the upper housing 102 and a second O-ring 180 positioned between the second tongue 168 and the second groove 178 ; and a latch receiving cavity 182 defined by a plurality of walls integrally formed with the upper housing 102 .
- the spring holder 200 is concentric with the latch spring constraint 202 and prevents the spring 198 from dislodging during normal operation of the latch 108 .
- the spring holder 200 aids in assembly by holding the spring 198 in place as the latch 108 is slid into position in the latch receiving cavity 182 .
- the upper housing 102 includes the latch receiving cavity/volume/pocket 182 that is sealed off from the internal cavity 128 of the battery pack 100 that holds the core pack 172 (core pack cavity/volume 128 ).
- the lower housing 104 includes a latch leg receptacle 205 for receiving a leg 207 of the latch 108 and constraining the latch 108 while not breaking the perimeter created by the O-ring seal.
- An upper and a lower housing 102 , 104 are created by an injection molding process.
- the lower housing 104 is formed with a first tongue feature 122 along a perimeter 192 of the lower housing 104 at a parting/mating surface 106 .
- FIG. 20 illustrates the first tongue 122 .
- the upper housing 102 is formed with a first groove feature 124 along a perimeter 194 of the upper housing 102 at a parting/mating surface and a second groove feature at an interior surface of the upper housing 102 .
- FIG. 24 illustrates the first and the second grooves 124 , 178 .
- an electronics subassembly 134 including a terminal block 138 , a main PCB 144 , power lines 142 , sense lines 148 and an SOC indicator 152 are created.
- a sealing plate 162 is assembled with the electronics subassembly 134 by sliding the sealing plate 162 onto the electronics subassembly 134 (particularly sliding a plurality of wires 146 connecting the main PCB 144 with a terminal block PCB 140 along a channel 164 in the sealing plate 162 ).
- the power lines 142 are then threaded through holes 166 in the sealing plate 162 .
- a sealant 170 such as RTV, is applied to the sealing plate channel 164 and the sealing plate holes 166 .
- FIG. 15 A sealant 170 , such as RTV, is applied to the sealing plate channel 164 and the sealing plate holes 166 .
- FIG. 16 the sealing plate 162 and electronics subassembly 134 are then assembled with the core pack 172 .
- the result of this assembly is illustrated in FIG. 17 .
- FIG. 18 the sealing plate 162 , electronics subassembly 134 and core pack 172 are then assembled with the lower housing 104 .
- the lower housing 104 includes a volume/cavity 128 to receive the core pack 172 .
- FIGS. 19 and 20 The result of this assembly is illustrated in FIGS. 19 and 20 . As illustrated in FIG.
- the latch 108 along with a spring 198 and a spring holder 200 are assembled with the upper housing 102 .
- the spring 198 is placed on the spring holder 200 .
- the spring holder 200 and spring 198 are assembled with the latch 108 .
- the latch 108 includes a latch spring constraint 202 , illustrated in FIG. 10 , that receives the spring 198 .
- latch spring 198 and latch spring holder 200 the spring 198 is compressed with the latch spring holder 200 , then the latch 108 , latch spring 198 and latch spring holder 202 subassembly is moved into the latch receiving cavity/volume 182 .
- the latch 108 may be slightly rotated clockwise (in the view shown in FIG.
- FIG. 22 The latch subassembly is then rotated counterclockwise (in the view shown in FIG. 22 ) back to the starting orientation and moved towards the terminal slots 114 until the spring holder 200 is positioned in a spring holder recess 204 in the first wall 184 defining the latch receiving cavity 182 .
- the latch 108 is released allowing the spring 198 to force the latch 108 upward (in the view shown in FIG. 22 ) and position the hook 112 through a hook opening in the upper housing 102 .
- the result of this assembly is illustrated in FIG. 23 .
- the first O-ring 126 and the second O-ring 180 are then placed in the first groove 124 and the second groove 178 , respectively, formed in the upper housing 102 , as illustrated in FIG. 25 .
- the lower housing 104 holding the core pack 172 , electronics subassembly 134 and sealing plate 162 —is then assembled with the upper housing 102 .
- the upper housing 102 is affixed to the lower housing 104 by the fasteners, such as screws. The result of this assembly is illustrated in FIGS. 1 - 9 .
- a sealed cavity (core pack cavity) 128 holding the core pack 172 and battery electronics 134 is created.
- This sealed cavity 128 is sealed from water that would otherwise enter the battery pack housing through the housing terminal slots 114 , around the latch 108 or through the parting/mating line interface 106 .
- a first exemplary option may be included in the battery pack 100 . As illustrated in FIGS. 27 A and 27 B , the groove 124 , tongue 122 and O-ring configuration 126 form part of the seal of the core pack cavity 128 . As gas builds up in the core pack cavity 128 , it will seek an escape through the interface between the upper housing 102 and the lower housing 104 .
- the O-ring 126 can be designed to have an elasticity to control the spacing between the upper housing 102 and the lower housing 104 .
- the O-ring 126 can be designed such that when the pressure in the core pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the gas will force the upper housing 102 slightly apart from the lower housing 104 and compress the O-ring 126 . This will allow some of the gas in the core pack cavity 128 to escape to outside the battery pack housing. Once the pressure is reduced below the predefined pressure threshold—due to the escape of some gas—the O-ring 126 will expand and the upper housing 102 will reengage the lower housing 104 , once again sealing the core pack cavity 128 .
- a predefined pressure threshold a pressure less than would cause damage to the battery pack housing
- a battery pack 100 ′ includes a sticker 220 over the SOC indicator 152 , as illustrated in FIG. 10 .
- This sticker 220 serves as part of the seal of the core pack cavity 128 by sealing any openings in the upper housing 102 that might receive the LEDs 158 , activation button 156 or other components of the SOC indicator subassembly.
- the adhesive characteristics of the sticker 220 may be designed such that once the pressure in the core pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the gas will force the sticker 220 to peel away from the upper housing 102 , as illustrated in FIG. 28 . Once the sticker 220 peels away from the upper housing 102 , the core pack cavity 128 will no longer be sealed.
- a battery pack 100 ′′ includes a pressure release element 230 can be included to work in conjunction with the spring 198 and the spring holder 200 to release a build up of pressure in the core pack cavity 128 .
- a vent hole 232 is present in the first wall 184 at the spring holder recess 204 .
- the hole 232 is covered and sealed by the pressure release element 230 .
- the pressure release element 230 may be a spherical component.
- the pressure release element 230 may be made of a soft rubber or plastic.
- the pressure release element 230 is sized to fill/seal the vent hole 232 and at least partially fill an internal hollow portion of the spring holder 200 .
- the spring 198 , spring holder 200 and pressure release element 230 are designed such that under normal operating conditions—no gas venting into the core pack cavity 128 —the spring 198 and the spring holder 200 will hold the pressure release element 230 such as to fill/seal the vent hole 232 . This will keep the core pack cavity 128 fully sealed, as illustrated in FIG. 31 A .
- the spring 198 , spring holder 200 and pressure release 230 element are also designed such that once the pressure in the core pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the force of the gas pressure will overcome the spring constant of the spring 198 and force the pressure release element 230 to move the spring holder 200 and compress the spring 198 to open the vent hole 232 , as illustrated in FIG. 31 B . This allows gas to escape the core pack cavity 128 and reduce the pressure within the core pack cavity 128 .
- a predefined pressure threshold a pressure less than would cause damage to the battery pack housing
- the spring 198 will expand and the pressure release element 230 will be forced back into the vent hole 232 , once again sealing the core pack cavity 128 .
- a blow out notch 210 in the tongue compressing the O-ring is designed to provide spacing between the tongue and groove ensuring the proper release pressure. Part of the groove wall is removed and the material of the 0 -Ring material is selected to be sufficiently compliant to deform and release the pressure inside the core pack cavity.
- the first tongue on the lower housing 104 and the second tongue on the sealing plate can be replaced by a third groove 240 (in place of the first tongue) and a fourth groove 240 (in place of the second tongue).
- a third O-ring 244 is then positioned in the third groove 240 and a fourth O-ring 246 is positioned in the fourth groove 242 .
- FIGS. 35 - 46 An alternate exemplary embodiment of a sealed battery pack 300 is illustrated in FIGS. 35 - 46 .
- the O-rings (O-ring 1 and O-ring 2 ) are replaced with a molded in place gasket.
- the lower housing 304 and the upper housing 302 are created by an injection molding process. This includes forming a first tongue 306 on the upper housing 302 at a mating line/parting line 308 a interface surface about the perimeter of the upper housing 302 and a second tongue 310 on the upper housing 302 at an interior wall surface 312 (positioned to mate with a corresponding second groove in the terminal block).
- the main PCB is then assembled with a core pack 326 .
- the core pack 326 is then assembled with the lower housing 304 .
- the upper housing 302 is then assembled with the lower housing 304 using fasteners, such as screws.
- the first tongue 306 engages with the first gasket 316 to create a seal at the mating line interface 308 between the upper housing 302 and the lower housing 304 .
- the second tongue 310 engages with the second gasket 322 to create a seal at the interface between the upper housing interior wall 312 and the terminal block 318 . This, in part, seals the core pack cavity 328 .
- FIGS. 47 - 64 Another exemplary embodiment of a battery pack 400 of the instant application is illustrated in FIGS. 47 - 64 .
- This embodiment replaces the sealing plate described above with regard to FIGS. 1 - 26 and utilizes low pressure molding materials and processes to assist in sealing the core pack cavity.
- This embodiment includes a battery pack housing 401 .
- the battery pack housing 401 includes an upper housing 402 and a lower housing 404 .
- the upper housing 402 and the lower housing 404 mate at a mating/parting line interface 406 . Similar to the embodiment described above in FIGS. 1 - 26 , this embodiment utilizes a tongue and groove and O-ring configuration at the mating/parting line interface.
- the upper housing 402 is formed/molded with a groove 408 around the perimeter 416 of the interface surface 412 and the lower housing 404 is formed/molded with a tongue 414 around the perimeter 416 of the interface surface 418 .
- the O-ring 420 is positioned in the groove 408 .
- this embodiment includes a latch area/cavity/pocket/volume 424 created in the upper housing 402 during molding process of the upper housing 402 by the formation of a plurality of walls 426 a 426 b, 426 c, 426 d to seal off the core pack cavity from the latch area/cavity 424 .
- this embodiment utilizes an LPM material/process, such as Macromelt® to create a seal between the terminal slots 428 and the core pack cavity 422 .
- the upper housing 402 is formed with an injection hole 428 between the fourth wall 426 d of the latch cavity 424 and the terminal slots 428 .
- a printed circuit board (PCB) module 432 is assembled with the upper housing 402 .
- a first LPM volume/cavity/space 434 is created between the terminals slots 428 , the latch cavity 424 , a first side of the PCB module 432 and an interior surface 434 of the upper housing 402 .
- the LPM material 436 is injected on both sides of the PCB module 432 —into the first LPM volume 434 and a volume 438 between the PCB module 432 and the core pack cavity 422 .
- the PCB module 432 may include a printed circuit board having a variety of electrical and electronic components and a terminal block subassembly mounted thereon and and may also include an insulating board having a switching network, as described in U.S. Pat. No. 9,583,793.
- the manufacture process for creating the pack is as follows:
- the PCB module straps 450 which are connected to the power terminals 116 a through the PCB module 432 —extend below the upper housing mating/parting line interface 406 .
- FIG. 64 An exemplary manner in which the gas may be vented is illustrated in FIG. 64 .
- four pressure release openings/holes 460 are created/present in a bottom wall 462 of the lower housing 404 .
- the openings 460 are covered by labels 464 that are fixed to an exterior surface of the bottom wall 462 .
- the labels 464 and the adhesive adhering the labels 464 to the bottom wall 462 are selected to maintain the seal of the core pack cavity 422 during normal operating conditions of the battery pack 400 and normal pressure levels within the core pack cavity 422 .
- the labels 464 and the adhesive are also selected to release from the bottom wall 462 of the lower housing 404 when the pressure in the core pack cavity 422 exceeds a predefined pressure threshold to allow the gas in the core pack cavity 422 to vent from the battery pack 400 to the environment outside the battery pack 400 .
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Computer Hardware Design (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
A battery pack having a battery housing that defines a cavity for receiving a plurality of battery cells. The battery pack cavity is sealed from the air outside the battery pack housing to prevent water and other contaminants from reaching the plurality of battery cells. The battery pack may include a sealing material to create a seal between an upper housing and a lower housing of the battery housing. The battery pack also include a sealing material to create a seal around a terminal block of the battery pack.
Description
- This application is a divisional of U.S. patent application Ser. No. 16/515,831, filed Jul. 18, 2019, entitled, “Battery Pack,” which claims the benefit of priority from U.S. Provisional Patent Application No. 62/700,036, filed Jul. 18, 2018, the contents all of which are incorporated herein in their entireties by reference.
- This application relates to a battery pack and method for manufacturing a battery pack. In one implementation, the battery pack includes a battery pack housing, a set of battery cells and a plurality of electrical and electronic components and features for sealing the battery pack housing to prevent water and/or other contaminates from reaching the set of battery cells and the plurality of electrical and electronic components.
- Removable, rechargeable battery packs are commonly used to power cordless power tools such as construction tools, e.g. drills, circular saws and reciprocating saws and landscaping tools, e.g. string trimmers, hedge trimmers and chain saws. These uses typically result in the battery packs being exposed to various environmental situations. Particularly, the battery packs are exposed to rain, snow and dust. As is well known, rain, snow and dust can have a deleterious effect on the battery packs, particularly the battery cells and the electronic components of the battery packs.
- Prior art battery packs have been designed to redirect water and dust and otherwise prevent the water and dust from impacting the cells and the electronics. One battery pack has included a discrete component added to the battery pack to create a separate housing for the latch. This component assists in keeping water from entering the cell cavity. However, because the component must be attached to the housing, in this instance by a screw through the component, the latch receptacle is not truly sealed from the cell cavity. Furthermore, this pack does not address other paths of ingress for water and as such, does not truly seal the battery cells and electronics from water.
- The present invention provides a battery pack that is fully seals the battery cell cavity and the battery electronics from water.
- An aspect of the present invention includes sealed battery pack. The battery pack includes various features to create a sealed core pack cavity holding the battery cells and various battery pack electronics. The features include a first O-ring at a mating/parting interface between an upper housing and a lower housing, a sealing plate and a second O-ring at an interface between the upper housing and the sealing plate and an integral cavity for receiving a latch.
- Advantages may include one or more of the following: preventing water and other contaminants from reaching the battery cells and/or battery pack electronics.
- These and other advantages and features will be apparent from the description and the drawings.
-
FIG. 1 is a rear, left side isometric view of a first exemplary embodiment of a battery pack of the instant application. -
FIG. 2 is a front, left side isometric view of the battery pack ofFIG. 1 . -
FIG. 3 is a front, right side isometric view of the battery pack ofFIG. 1 . -
FIG. 4 is a right side elevation view of the battery pack ofFIG. 1 . -
FIG. 5 is a left side elevation view of the battery pack ofFIG. 1 . -
FIG. 6 is a top plan view of the battery pack ofFIG. 1 . -
FIG. 7 is a front elevation view of the battery pack ofFIG. 1 . -
FIG. 8 is a rear elevation view of the battery pack ofFIG. 1 . -
FIG. 9 is a bottom plan view of the battery pack ofFIG. 1 . -
FIG. 10 is a section view taken along line A-A of the battery pack ofFIG. 6 . -
FIG. 11 is an isometric of a component subassembly of the battery pack ofFIG. 1 . -
FIG. 12 is a side view of the component subassembly ofFIG. 11 . -
FIG. 13 is a top view of the component subassembly ofFIG. 11 and a sealing component of the instant application prior to assembly. -
FIG. 14 is an isometric of the component subassembly and sealing component ofFIG. 13 after assembly. -
FIG. 15 is an isometric view of the component subassembly and sealing component ofFIG. 14 after application of a sealant. -
FIG. 16 is an isometric view of the component subassembly and sealing component ofFIG. 15 and a core pack of the battery pack ofFIG. 1 prior to assembly. -
FIG. 17 is an isometric of the component subassembly, sealing component and core pack ofFIG. 16 after assembly. -
FIG. 18 is an isometric view of the assembly ofFIG. 17 and a lower housing of the battery pack ofFIG. 1 prior to assembly. -
FIG. 19 is an isometric view of the assembly ofFIG. 18 and the lower housing of the battery pack ofFIG. 1 after assembly. -
FIG. 20 is a top view of the assembly ofFIG. 18 and the lower housing of the battery pack ofFIG. 1 after assembly. -
FIG. 21 is a front, left side isometric view of an upper housing of the battery pack ofFIG. 1 . -
FIG. 22 is a front, right side isometric view of the upper housing ofFIG. 21 and a latch subassembly of the battery pack ofFIG. 1 prior to assembly. -
FIG. 23 is a front, left side isometric view of the upper housing and latch subassembly ofFIG. 22 after assembly. -
FIG. 24 is a front, left side isometric interior view of the upper housing ofFIG. 21 . -
FIG. 25 is a front, right side isometric interior view of the upper housing ofFIG. 21 and a pair of O-rings prior to assembly. -
FIG. 26 is a left side elevation view of the assembly ofFIG. 19 and the upper housing ofFIG. 25 after assembly of the upper housing and the O-rings prior to assembly. -
FIGS. 27A and 27B are section views taken along line B-B of the battery pack ofFIG. 6 before and after a pressure release. -
FIG. 28 is a section view taken along line A-A of the battery pack ofFIG. 6 during and after a pressure release -
FIG. 29 is a front, left side isometric view of an alternate embodiment of the battery pack ofFIG. 1 . -
FIG. 30 is a top view of the battery pack ofFIG. 29 . -
FIGS. 31A and 31B are section views taken along line A-A of the battery pack ofFIG. 30 before and after a pressure release. -
FIG. 32 is a front, left side isometric interior view of an alternate embodiment of the upper housing of the battery pack ofFIG. 1 . -
FIG. 33 is a front, left side isometric view of an alternate embodiment of the lower housing of the battery pack ofFIG. 1 . -
FIGS. 34A and 34B are section views taken along line B-B of the battery pack ofFIG. 6 in the embodiment ofFIG. 33 before and after a pressure release. -
FIG. 35 is a front, right side isometric view of a second exemplary embodiment of a battery pack of the instant application. -
FIG. 36 is a top view of the battery pack ofFIG. 35 . -
FIG. 37 is a section view along line A-A of the battery pack ofFIG. 36 . -
FIG. 38 is a front, right side isometric view of the upper housing of the battery pack ofFIG. 35 . -
FIG. 39 is a front, right side isometric view of the lower housing of the battery pack ofFIG. 35 . -
FIG. 40 is a top view of the upper housing ofFIG. 38 . -
FIG. 41 is a section view along line B-B of the upper housing ofFIG. 40 . -
FIG. 42 is a front, left side isometric interior view of the upper housing ofFIG. 40 . -
FIG. 43 is a rear, right side isometric view of the lower housing and core pack assembly of the battery pack ofFIG. 35 . -
FIG. 44 a rear, left side exploded isometric view of the lower housing and core pack assembly ofFIG. 43 . -
FIG. 45 is a is a section view at detail C of the battery pack ofFIG. 37 . -
FIG. 46 is an isometric view of a terminal block subassembly of the battery pack ofFIG. 35 . -
FIG. 47 is a front, right side isometric view of a third exemplary embodiment of a battery pack of the instant application. -
FIG. 48 is a rear, left side isometric view of the battery pack ofFIG. 47 . -
FIG. 49 is a bottom plan view of the battery pack ofFIG. 47 . -
FIG. 50 is a top plan view of the battery pack ofFIG. 47 . -
FIG. 51 is a left side elevation view of the battery pack ofFIG. 47 . -
FIG. 52 is a right side elevation view of the battery pack ofFIG. 47 . -
FIG. 53 is a front elevation view of the battery pack ofFIG. 47 . -
FIG. 54 is a rear elevation view of the battery pack ofFIG. 47 . -
FIG. 55 is a front, right side isometric view of the upper housing of the battery pack ofFIG. 47 and an electronics module assembly assembled together. -
FIG. 56 is a side view of the assembly ofFIG. 55 . -
FIG. 57 is a section view of the assembly ofFIG. 55 taken along section line A-A ofFIG. 50 . -
FIG. 58 is a section view of the assembly ofFIG. 57 including a first volume of low pressure molded material. -
FIG. 59 is a section view of the assembly ofFIG. 58 including the first volume of low pressure molded material and a second volume of low pressure molded material. -
FIG. 60 is a front, right side isometric view of the assembly ofFIG. 59 and an O-ring prior to assembly. -
FIG. 61 is a front, right side isometric view of the assembly ofFIG. 59 after the O-ring and a core pack have been assembly with the upper housing. -
FIG. 62 is a side elevation view of the battery pack ofFIG. 47 . -
FIG. 63 is a section view along section line A-A ofFIG. 50 . -
FIG. 64 is a bottom isometric view of the of the battery pack ofFIG. 47 . - Referring to
FIGS. 1-9 , there is illustrated a first exemplary embodiment of a sealedbattery pack 100. Thebattery pack 100 includes anupper housing 102 and alower housing 104. The upper andlower housings parting line 106. Thebattery pack 100 also includes alatch 108. Thelatch 108 enables thebattery pack 100 to be coupled to and decoupled from an associated power tool, as is well known in the industry. Thelatch 108 includes a user operable feature, referred to as a button 110 and a hook 112 that mates with a corresponding catch of the power tool. Theupper housing 102 includes a space to hold thelatch 108. Theupper housing 102 also includes an opening for allowing the hook 112 to move into and out of thebattery pack 100 for coupling and decoupling to the power tool. - The
upper housing 102 also includes a plurality ofterminal slots 114. Thebattery pack 100 includes a plurality ofterminals 116 that are coupled to a set ofbattery cells 118. The set ofterminals 116 include a subset of power terminals 116 a and a subset of signal terminals 116 b. The power terminals 116 a enable power to be drawn from thebattery cells 118 to drive the power tool and to be supplied to thebattery cells 118 from a charger to charge thebattery cells 118. The signal terminals 116 b provide information to the power tool and/or charger regarding various characteristics of thebattery cells 118. Theterminals slots 114 allow for corresponding terminals of the power tool and charger to enter thebattery housing 102/104 and mate with thebattery terminals 116. - Conventionally, the
parting line 106, the space to hold thelatch 108 and the opening for the hook 112, and theterminal slots 114 present openings to thebattery housing 102/104 for water, dust or other contaminants to enter thebattery pack 100 and access thebattery cells 118 and/or the battery electronics 120. This can have serious deleterious effects on thebattery cells 118 and/or the battery electronics 120. - To this end, the present invention provides solutions to prevent water from entering the
battery pack 100 at these three locations. - First, the
battery pack 100 includes a tongue and groove configuration and an O-ring between the tongue and groove at the parting line. Second, the battery pack includes a plurality of walls formed integrally with the housing to create cavity that is completely sealed from the cavity that holds the battery cells and the battery electronics. Third, the battery pack includes a sealing plate and a tongue and groove configuration between the sealing plate and the upper housing to seal the cavity that holds the battery cells and the battery electronics from theterminal slots 114. Alternatively, the battery pack includes sealants (or sealing materials) to seal the cavity that holds the battery cells and the battery electronics from theterminal slots 114. - As noted above, the battery pack includes an upper housing and a lower housing. Each of the housings is formed using an injection molding process as is well known in the industry. The upper and
lower housings lower housings lower housing mating line 106. Each of the upper andlower housings - As illustrated in
FIGS. 19, 20, and 24 , thelower housing 104—formed during the injection molding process—includes afirst tongue 122 and theupper housing 102—formed during the injection molding process—includes afirst groove 124. As will be explained in more detail below, during the assembly process of the battery pack 100 a first O-ring 126 is placed in thefirst groove 124. Theupper housing 102 and thelower housing 104 are then assembled. As illustrated inFIG. 27A , when theupper housing 102 and thelower housing 104 are assembled, a seal is created at theparting line 106 between acore pack cavity 128 and the air outside thebattery pack 100. Fasteners, such as screws, are used to hold thelower housing 104 andupper housing 102 together and maintain the seal. - As noted above, contaminants particularly water may enter the
battery housing 102/104 through theterminal slots 114. The water moves into a space adjacent to the pack electronics 120, particularly a battery pack printed circuit board. In order to protect the PCB and electronics, thebattery pack 100 includes a sealingplate 162 to seal the core pack cavity 128 (also referred to generally as a sealed cavity) in the space where water would enter thebattery pack 100 through theterminal slots 114. - As illustrated in
FIGS. 10-20 , thebattery pack 100 includes anelectronics subassembly 134 as shown inFIGS. 11 and 12 . The electronics subassembly 134 includes a set ofterminals 116 held in aterminal housing 136—together forming a terminal block 138. A terminal printed circuit board (PCB) 140 is attached to a rear side of theterminal housing 136. The plurality ofterminals 116 are connected to theterminal PCB 140. The electronics subassembly 134 also includes a pair of power lines 142 (wires). One of thepower lines 142 is connected to a positive (+) power terminal 116 a 1 and one of the power lines is connected to a negative (−) power terminal 116 a 2. Theterminal PCB 140 is connected to amain PCB 144 by a plurality of connection wires 146. The connection wires 146 are connected to the plurality ofterminals 116 by traces on theterminal PCB 140. The electronics subassembly 134 also includes a plurality ofsense wires 148. At one end, thesense wires 148 are connected to themain PCB 144 and at another end thesense wires 148 will be connected to intra-cell battery straps 150 to provide intra-cell voltages to themain PCB 144 and the signal terminals 116 b. Thesense wires 148 are connected to the connection wires 146 by traces on themain PCB 144. The electronics subassembly 134 also includes a state of charge (SOC)indicator 152. TheSOC indicator 152 includes an SOC PCB 154, an activation button 156, a plurality of LEDs 158 and other components. The SOC PCB 154 is connected to themain PCB 144 by a pair of wires 160. - As illustrated in
FIG. 13 , the battery pack includes a sealingplate 162. The sealingplate 162 is created through an injection molding process. The sealingplate 162 may be made of the same material as the upper andlower housings plate 162 includes a sealingplate channel 164. The sealingplate channel 164 allows the sealingplate 162 to be assembled with theelectronics subassembly 134. The sealingplate channel 164 receives the connection wires 146 when the sealingplate 162 is combined with theelectronics subassembly 134, as indicated by the arrow. The sealingplate 162 also includes a pair of sealing plate holes 166. The sealingplate holes 166 allow for thepower wires 142 to be threaded through the sealingplate 162. The sealingplate 162 is also formed/configured with asecond tongue 168 along a perimeter of the sealingplate 162. As illustrated inFIGS. 13 and 14 , the sealingplate 162 is slide onto/over themain PCB 144 such that the connection wires 146 are positioned in thesealing plate channel 164 when complete and thepower lines 142 are threaded through the sealing plate holes 166. - As illustrated in
FIG. 15 , after thesealing plate 162 is installed onto theelectronics subassembly 134, asealant 170 such as RTV is applied to thesealing plate channel 164 and the sealing plate holes 166. This provides a solid sealing plate 162 (which will serve to create a seal between thehousing terminals slots 114 and the core pack cavity 128). - As illustrated in
FIG. 16 , after thesealant 170 is applied to the sealingplate 162, the combination of theelectronics subassembly 134 and sealingplate 162 is assembled onto thecore pack 172. Thecore pack 172 includes at least a plurality ofbattery cells 118, abattery cell holder 174 and a plurality of battery straps 176. -
FIG. 17 illustrates theelectronics subassembly 134 and sealingplate 162 assembled onto thecore pack 172. The sense lines 148 are connected to intra-cell battery straps 176 b (by welding or soldering or other fixing method) and thepower lines 142 are connected to the power battery straps 176 a. As illustrated inFIG. 18 , thecore pack 172, electronics subassembly 134 and sealingplate 162 are assembled with thelower housing 104.FIGS. 19 and 20 illustrate thecore pack 172, electronics subassembly 134 and sealingplate 162 assembled with thelower housing 104. - As illustrated in
FIGS. 24 and 25 , theupper housing 102 is formed with asecond groove 178 and a second O-ring 180 is assembled into thesecond groove 178. As such, when theupper housing 102 is assembled with thelower housing 104 as illustrated inFIG. 26 and theupper housing 102 is fastened to thelower housing 104, a seal is formed between theupper housing 102 and the sealingplate 162 by the second O-ring 180 abutting with thesecond tongue 168. This is similar to the seal that is formed between theupper housing 102 and thelower housing 104 by the first O-ring 126 and thefirst tongue 124, illustrated inFIG. 27A . - Alternatively, the first and
second grooves lower housing 104 and the sealingplate 162, respectively and the first andsecond tongues upper housing 102 with the first and second O-rings second grooves - As noted above, in conventional battery packs, contaminants, particularly water may enter the battery housing and the core pack cavity through a latch opening in the
upper housing 102. The battery pack of the instant application includes a latch receiving cavity/volume 182. Thelatch receiving cavity 182 is created by a plurality of walls integrally formed in theupper housing 102. The plurality of latch receiving cavity walls are formed during the injection molding process of theupper housing 102. As illustrated inFIGS. 10 and 21 , theupper housing 102 includes a first (bottom)wall 184, a second (side)wall 186, a third (side)wall 188, and fourth (rear)wall 190. The second, third andfourth walls bottom wall 186. Together these four walls define a cavity/volume 182 in which thelatch 108 is received. As these walls are formed integrally with each other and theupper housing 102, the cavity/volume 182 formed by these walls is sealed from thecore pack cavity 128. This seal prevents water (and other contaminants) that enters the latch cavity/volume 182 from entering thecore pack cavity 128. As such, thebattery cells 118 will not be negatively affected by such water (and other contaminants). - The foregoing describes the various features included in the
battery pack 100 to seal thecore pack cavity 128 and the battery electronics 120 and prevent water (and other contaminants) from negatively affecting thebattery cells 118 and the battery electronics 120. - As illustrated in
FIG. 10 , thebattery pack 100 includes anupper housing 102 and alower housing 104. In order to seal thecore pack 172—and thecore pack cavity 128 that houses thecore pack 172—and thebattery pack electronics 170 on amain PCB 144, thebattery pack 100 includes afirst tongue 122 on thelower housing 104, afirst groove 124 on theupper housing 102 and a first O-ring 126 positioned between thefirst tongue 122 and thefirst groove 124; asecond tongue 168 positioned on the sealingplate 162, asecond groove 178 on theupper housing 102 and a second O-ring 180 positioned between thesecond tongue 168 and thesecond groove 178; and alatch receiving cavity 182 defined by a plurality of walls integrally formed with theupper housing 102. To properly constrain thelatch 108, there is aspring holder 200. Thespring holder 200 is concentric with thelatch spring constraint 202 and prevents thespring 198 from dislodging during normal operation of thelatch 108. Thespring holder 200 aids in assembly by holding thespring 198 in place as thelatch 108 is slid into position in thelatch receiving cavity 182. Theupper housing 102 includes the latch receiving cavity/volume/pocket 182 that is sealed off from theinternal cavity 128 of thebattery pack 100 that holds the core pack 172 (core pack cavity/volume 128). Thelower housing 104 includes alatch leg receptacle 205 for receiving aleg 207 of thelatch 108 and constraining thelatch 108 while not breaking the perimeter created by the O-ring seal. - The following describes the method for manufacturing the sealed
battery pack 100. An upper and alower housing lower housing 104 is formed with afirst tongue feature 122 along a perimeter 192 of thelower housing 104 at a parting/mating surface 106.FIG. 20 illustrates thefirst tongue 122. Theupper housing 102 is formed with afirst groove feature 124 along a perimeter 194 of theupper housing 102 at a parting/mating surface and a second groove feature at an interior surface of theupper housing 102.FIG. 24 illustrates the first and thesecond grooves FIGS. 11 and 12 , anelectronics subassembly 134 including a terminal block 138, amain PCB 144,power lines 142,sense lines 148 and anSOC indicator 152 are created. - As illustrated in
FIGS. 13 and 14 , a sealingplate 162 is assembled with the electronics subassembly 134 by sliding the sealingplate 162 onto the electronics subassembly 134 (particularly sliding a plurality of wires 146 connecting themain PCB 144 with aterminal block PCB 140 along achannel 164 in the sealing plate 162). Thepower lines 142 are then threaded throughholes 166 in the sealingplate 162. - A
sealant 170, such as RTV, is applied to thesealing plate channel 164 and the sealing plate holes 166. The result of this application is illustrated inFIG. 15 . As illustrated inFIG. 16 , the sealingplate 162 and electronics subassembly 134 are then assembled with thecore pack 172. The result of this assembly is illustrated inFIG. 17 . As illustrated inFIG. 18 , the sealingplate 162, electronics subassembly 134 andcore pack 172 are then assembled with thelower housing 104. Thelower housing 104 includes a volume/cavity 128 to receive thecore pack 172. The result of this assembly is illustrated inFIGS. 19 and 20 . As illustrated inFIG. 22 , thelatch 108 along with aspring 198 and aspring holder 200 are assembled with theupper housing 102. Thespring 198 is placed on thespring holder 200. Thespring holder 200 andspring 198 are assembled with thelatch 108. Thelatch 108 includes alatch spring constraint 202, illustrated inFIG. 10 , that receives thespring 198. To install thelatch 108,latch spring 198 and latchspring holder 200, thespring 198 is compressed with thelatch spring holder 200, then thelatch 108,latch spring 198 and latchspring holder 202 subassembly is moved into the latch receiving cavity/volume 182. Thelatch 108 may be slightly rotated clockwise (in the view shown inFIG. 22 ) to allow the hook 112 to be moved under a bridge connecting the second andthird walls latch receiving cavity 182. The latch subassembly is then rotated counterclockwise (in the view shown inFIG. 22 ) back to the starting orientation and moved towards theterminal slots 114 until thespring holder 200 is positioned in aspring holder recess 204 in thefirst wall 184 defining thelatch receiving cavity 182. Thelatch 108 is released allowing thespring 198 to force thelatch 108 upward (in the view shown inFIG. 22 ) and position the hook 112 through a hook opening in theupper housing 102. The result of this assembly is illustrated inFIG. 23 . - The first O-
ring 126 and the second O-ring 180 are then placed in thefirst groove 124 and thesecond groove 178, respectively, formed in theupper housing 102, as illustrated inFIG. 25 . As illustrated inFIG. 26 , thelower housing 104—holding thecore pack 172, electronics subassembly 134 and sealingplate 162—is then assembled with theupper housing 102. Theupper housing 102 is affixed to thelower housing 104 by the fasteners, such as screws. The result of this assembly is illustrated inFIGS. 1-9 . - As a result of this design and manufacture, a sealed cavity (core pack cavity) 128 holding the
core pack 172 andbattery electronics 134 is created. This sealedcavity 128 is sealed from water that would otherwise enter the battery pack housing through thehousing terminal slots 114, around thelatch 108 or through the parting/mating line interface 106. - It is well known that when
battery cells 118 fail they can vent a gaseous substance. In a sealed cavity such as thecore pack cavity 128, the venting of the gaseous substance will cause a pressure build up in thecore pack cavity 128. To prevent thebattery pack 100 from exploding due to the build up of the gaseous substance, a first exemplary option may be included in thebattery pack 100. As illustrated inFIGS. 27A and 27B , thegroove 124,tongue 122 and O-ring configuration 126 form part of the seal of thecore pack cavity 128. As gas builds up in thecore pack cavity 128, it will seek an escape through the interface between theupper housing 102 and thelower housing 104. The O-ring 126 can be designed to have an elasticity to control the spacing between theupper housing 102 and thelower housing 104. The O-ring 126 can be designed such that when the pressure in thecore pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the gas will force theupper housing 102 slightly apart from thelower housing 104 and compress the O-ring 126. This will allow some of the gas in thecore pack cavity 128 to escape to outside the battery pack housing. Once the pressure is reduced below the predefined pressure threshold—due to the escape of some gas—the O-ring 126 will expand and theupper housing 102 will reengage thelower housing 104, once again sealing thecore pack cavity 128. - In an alternate embodiment, as illustrated in
FIG. 28 , abattery pack 100′ includes asticker 220 over theSOC indicator 152, as illustrated inFIG. 10 . Thissticker 220 serves as part of the seal of thecore pack cavity 128 by sealing any openings in theupper housing 102 that might receive the LEDs 158, activation button 156 or other components of the SOC indicator subassembly. The adhesive characteristics of thesticker 220 may be designed such that once the pressure in thecore pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the gas will force thesticker 220 to peel away from theupper housing 102, as illustrated inFIG. 28 . Once thesticker 220 peels away from theupper housing 102, thecore pack cavity 128 will no longer be sealed. - In another alternate embodiment, a
battery pack 100″ includes apressure release element 230 can be included to work in conjunction with thespring 198 and thespring holder 200 to release a build up of pressure in thecore pack cavity 128. As illustrated inFIGS. 29, 30, 31A and 31B , avent hole 232 is present in thefirst wall 184 at thespring holder recess 204. Thehole 232 is covered and sealed by thepressure release element 230. Thepressure release element 230 may be a spherical component. Thepressure release element 230 may be made of a soft rubber or plastic. Thepressure release element 230 is sized to fill/seal thevent hole 232 and at least partially fill an internal hollow portion of thespring holder 200. Thespring 198,spring holder 200 andpressure release element 230 are designed such that under normal operating conditions—no gas venting into thecore pack cavity 128—thespring 198 and thespring holder 200 will hold thepressure release element 230 such as to fill/seal thevent hole 232. This will keep thecore pack cavity 128 fully sealed, as illustrated inFIG. 31A . Thespring 198,spring holder 200 andpressure release 230 element are also designed such that once the pressure in thecore pack cavity 128 reaches a predefined pressure threshold (a pressure less than would cause damage to the battery pack housing), the force of the gas pressure will overcome the spring constant of thespring 198 and force thepressure release element 230 to move thespring holder 200 and compress thespring 198 to open thevent hole 232, as illustrated inFIG. 31B . This allows gas to escape thecore pack cavity 128 and reduce the pressure within thecore pack cavity 128. Once the pressure inside thecore pack cavity 128 is reduced to below the predefined pressure threshold—due to the escape of some gas—thespring 198 will expand and thepressure release element 230 will be forced back into thevent hole 232, once again sealing thecore pack cavity 128. - As illustrated in
FIGS. 32 and 33 , in another alternate embodiment of abattery pack 100″', a blow outnotch 210 in the tongue compressing the O-ring is designed to provide spacing between the tongue and groove ensuring the proper release pressure. Part of the groove wall is removed and the material of the 0-Ring material is selected to be sufficiently compliant to deform and release the pressure inside the core pack cavity. As illustrated inFIGS. 34A and 34B , in another alternate embodiment of abattery pack 100″″, the first tongue on thelower housing 104 and the second tongue on the sealing plate can be replaced by a third groove 240 (in place of the first tongue) and a fourth groove 240 (in place of the second tongue). A third O-ring 244 is then positioned in thethird groove 240 and a fourth O-ring 246 is positioned in the fourth groove 242. - An alternate exemplary embodiment of a sealed
battery pack 300 is illustrated inFIGS. 35-46 . In this embodiment, the O-rings (O-ring 1 and O-ring 2) are replaced with a molded in place gasket. In this process, thelower housing 304 and theupper housing 302 are created by an injection molding process. This includes forming afirst tongue 306 on theupper housing 302 at a mating line/parting line 308 a interface surface about the perimeter of theupper housing 302 and asecond tongue 310 on theupper housing 302 at an interior wall surface 312 (positioned to mate with a corresponding second groove in the terminal block). This also includes forming afirst groove 314 in thelower housing 304 at a mating line/parting line interface surface 308 b about the perimeter of thelower housing 304. Thereafter, afirst gasket 316 is formed in thefirst groove 314 by another injection molding process. In addition, aterminal block 318 is created by an injection molding process. This includes forming asecond groove 320 in theterminal block 318 about a perimeter of theterminal block 318. Thereafter, asecond gasket 322 is formed in thesecond groove 320 by an injection molding process. Theterminal block 318 andsecond gasket 322 subassembly is then assembled to amain PCB 324. - The main PCB is then assembled with a core pack 326. The core pack 326 is then assembled with the
lower housing 304. Theupper housing 302 is then assembled with thelower housing 304 using fasteners, such as screws. When theupper housing 302 is assembled with the lower housing 304 (as illustrated in section inFIG. 37 ) thefirst tongue 306 engages with thefirst gasket 316 to create a seal at the mating line interface 308 between theupper housing 302 and thelower housing 304. This, in part, seals thecore pack cavity 328. Furthermore, when theupper housing 302 is assembled with thelower housing 304 thesecond tongue 310 engages with thesecond gasket 322 to create a seal at the interface between the upper housing interior wall 312 and theterminal block 318. This, in part, seals thecore pack cavity 328. - Another exemplary embodiment of a
battery pack 400 of the instant application is illustrated inFIGS. 47-64 . This embodiment replaces the sealing plate described above with regard toFIGS. 1-26 and utilizes low pressure molding materials and processes to assist in sealing the core pack cavity. - This embodiment includes a battery pack housing 401. The battery pack housing 401 includes an
upper housing 402 and alower housing 404. Theupper housing 402 and thelower housing 404 mate at a mating/parting line interface 406. Similar to the embodiment described above inFIGS. 1-26 , this embodiment utilizes a tongue and groove and O-ring configuration at the mating/parting line interface. Theupper housing 402 is formed/molded with agroove 408 around the perimeter 416 of the interface surface 412 and thelower housing 404 is formed/molded with a tongue 414 around the perimeter 416 of the interface surface 418. During the pack manufacturing process—described below—the O-ring 420 is positioned in thegroove 408. When theupper housing 402 is assembled with thelower housing 404, a seal is formed between the upper andlower housings - Similar to the embodiment described above with respect to
FIGS. 1-26 , this embodiment includes a latch area/cavity/pocket/volume 424 created in theupper housing 402 during molding process of theupper housing 402 by the formation of a plurality of walls 426 a 426 b, 426 c, 426 d to seal off the core pack cavity from the latch area/cavity 424. - As noted above, this embodiment utilizes an LPM material/process, such as Macromelt® to create a seal between the
terminal slots 428 and the core pack cavity 422. Theupper housing 402 is formed with aninjection hole 428 between the fourth wall 426 d of thelatch cavity 424 and theterminal slots 428. A printed circuit board (PCB)module 432 is assembled with theupper housing 402. A first LPM volume/cavity/space 434 is created between theterminals slots 428, thelatch cavity 424, a first side of thePCB module 432 and aninterior surface 434 of theupper housing 402. TheLPM material 436 is injected on both sides of thePCB module 432—into thefirst LPM volume 434 and avolume 438 between thePCB module 432 and the core pack cavity 422. ThePCB module 432 may include a printed circuit board having a variety of electrical and electronic components and a terminal block subassembly mounted thereon and and may also include an insulating board having a switching network, as described in U.S. Pat. No. 9,583,793. - The manufacture process for creating the pack is as follows:
-
- 1) Mold the upper and lower housings through an injection molding process
- 2) Remove the upper and lower housings from the mold
- 3) Insert the PCB module in the upper housing (the result of this step is illustrated in
FIGS. 55, 56 and 57 ) creating an upper housing assembly - 4) Place a next mold adjacent to an underside of the PCB module/interior of upper housing so at to not allow LPM material between the mold and the PCB module
- 5) Inject LPM material through the injection hole in upper housing (the result of this step is illustrated in
FIG. 58 ) - 6) Remove the upper housing assembly from the mold and place a next mold adjacent to the underside of the PCB module/interior of upper housing with space between the mold and the PCB module to allow for LPM material between the mold and the PCB module
- 7) Inject LPM material between the mold and the PCB module (the result of this step is illustrated in
FIG. 59 ) - 8) Remove upper housing assembly having LPM material on both sides of the PCB module from the mold
- 9) Insert an O-ring in the groove in the upper housing (as illustrated in
FIG. 60 ) - 10) Assemble latch with the upper housing
- 11) Assemble core pack to upper housing and solder/weld the PCB module straps to the core pack straps and the sense lines to the intra-cell straps (the result of this step is illustrated in
FIG. 61 ) - 12) Assemble the lower housing to the upper housing (the result of this step is illustrated in
FIG. 62 )
- As illustrated in
FIGS. 56, 57, and 61 , the PCB module straps 450—which are connected to the power terminals 116 a through thePCB module 432—extend below the upper housing mating/parting line interface 406. This allows the PCB module straps 450 to be connected (soldered/welded) to the core pack straps 452 after thecore pack 456 is assembled with theupper housing assembly 402. This is necessary because in order to seal thePCB module 432 with theLPM material 436, thePCB module 432 must be assembled with theupper housing 402 prior to assembly of thecore pack 456 and thePCB module 432 to allow for the LPM process. If the PCB module straps 450 did not extend below the mating/parting line interface 406 the connection location for the PCB module straps 450 and the core pack straps 452 would not be accessible to soldering/welding tools. - As noted above, when battery cells fail, they vent gas as part of their failure and safety mechanism to release pressure inside the battery cell. In a sealed cavity—such as the core pack cavity in this pack—this release of pressure inside the cell and build up of gas inside the core pack cavity increases the pressure in the core pack cavity. As such, it is important to have a means of venting the gas from the core pack cavity. An exemplary manner in which the gas may be vented is illustrated in
FIG. 64 . In this manner, four pressure release openings/holes 460 are created/present in a bottom wall 462 of thelower housing 404. Theopenings 460 are covered bylabels 464 that are fixed to an exterior surface of the bottom wall 462. Thelabels 464 and the adhesive adhering thelabels 464 to the bottom wall 462 are selected to maintain the seal of the core pack cavity 422 during normal operating conditions of thebattery pack 400 and normal pressure levels within the core pack cavity 422. However, thelabels 464 and the adhesive are also selected to release from the bottom wall 462 of thelower housing 404 when the pressure in the core pack cavity 422 exceeds a predefined pressure threshold to allow the gas in the core pack cavity 422 to vent from thebattery pack 400 to the environment outside thebattery pack 400. - Numerous modifications may be made to the exemplary implementations described above. These and other implementations are within the scope of this application.
Claims (3)
1. A battery pack comprising:
a housing comprising a lower housing and upper housing assembled together at a parting line to form an internal cavity;
a plurality of battery cells positioned in the internal cavity;
a latch receiving cavity formed in the upper housing and a latch for affixing the housing to an external device, the latch received in the latch receiving cavity, the latch receiving cavity sealed from the internal cavity.
2. The battery pack, as recited in claim 1 , wherein the upper housing includes a first wall, a second wall, a third wall and a fourth wall, the first, second, third, and fourth walls meet to form the latch receiving cavity.
3. The battery pack, as recited in claim 2 , wherein the first, second, third, and fourth walls are formed integrally with each other during formation of the upper housing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/124,461 US20230223634A1 (en) | 2018-07-18 | 2023-03-21 | Battery park |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862700036P | 2018-07-18 | 2018-07-18 | |
US16/515,831 US11611124B2 (en) | 2018-07-18 | 2019-07-18 | Battery pack |
US18/124,461 US20230223634A1 (en) | 2018-07-18 | 2023-03-21 | Battery park |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/515,831 Division US11611124B2 (en) | 2018-07-18 | 2019-07-18 | Battery pack |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230223634A1 true US20230223634A1 (en) | 2023-07-13 |
Family
ID=69406327
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/515,831 Active 2040-06-29 US11611124B2 (en) | 2018-07-18 | 2019-07-18 | Battery pack |
US18/124,461 Pending US20230223634A1 (en) | 2018-07-18 | 2023-03-21 | Battery park |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/515,831 Active 2040-06-29 US11611124B2 (en) | 2018-07-18 | 2019-07-18 | Battery pack |
Country Status (1)
Country | Link |
---|---|
US (2) | US11611124B2 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWD191971S (en) * | 2017-01-17 | 2018-08-01 | 創科(澳門離岸商業服務)有限公司 | Battery pack with communication terminal |
USD890692S1 (en) * | 2018-04-11 | 2020-07-21 | Black & Decker Inc. | Battery pack |
USD891363S1 (en) * | 2018-04-12 | 2020-07-28 | Black & Decker Inc. | Battery pack |
USD893411S1 (en) * | 2018-04-13 | 2020-08-18 | Black & Decker Inc. | Battery pack |
US11563239B2 (en) * | 2019-05-03 | 2023-01-24 | Black & Decker Inc. | Battery pack and method of manufacture |
USD937761S1 (en) | 2019-06-12 | 2021-12-07 | Techtronic Cordless Gp | Terminal block of a battery pack |
USD937195S1 (en) | 2019-06-12 | 2021-11-30 | Techtronic Cordless Gp | Interface of a battery pack |
USD937759S1 (en) | 2019-06-12 | 2021-12-07 | Techtronic Cordless Gp | Terminal block of a battery pack |
USD911802S1 (en) | 2019-06-12 | 2021-03-02 | Techtronic Cordless Gp | Interface of a power tool |
USD937760S1 (en) | 2019-06-12 | 2021-12-07 | Techtronic Cordless Gp | Terminal block of a battery pack |
US11670819B2 (en) | 2019-08-09 | 2023-06-06 | Techtronic Cordless Gp | Battery pack including staggered battery pack terminals |
US11575176B2 (en) * | 2019-08-09 | 2023-02-07 | Techtronic Cordlesss GP | Battery pack |
US11145929B2 (en) | 2019-08-09 | 2021-10-12 | Techtronic Cordless Gp | Battery pack |
US11901570B2 (en) * | 2019-09-16 | 2024-02-13 | Black & Decker Inc. | Battery pack |
USD931802S1 (en) * | 2019-10-09 | 2021-09-28 | Würth International Ag | Battery |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6729413B2 (en) * | 2001-08-24 | 2004-05-04 | Black & Decker Inc. | Power tool with battery pack ejector |
US7618741B2 (en) * | 2005-10-31 | 2009-11-17 | Black & Decker Inc. | Battery pack, charger and terminal block arrangements for cordless power tool system |
US20070277987A1 (en) * | 2006-05-26 | 2007-12-06 | Meyer Gary D | Power tool, battery pack, and method of operating the same |
EP2329921B1 (en) * | 2009-12-07 | 2016-03-16 | Black & Decker Inc. | Anti-theft system |
CN204424329U (en) * | 2011-12-30 | 2015-06-24 | 株式会社牧田 | Be suitable for the battery pack used together with hand held electric tool |
CN109075278B (en) * | 2016-04-05 | 2021-10-29 | 株式会社村田制作所 | Battery pack and electronic device having the same |
US20180311807A1 (en) * | 2017-04-27 | 2018-11-01 | Black & Decker Inc. | Cordless Power Tool and Multi-Purpose Battery Pack System |
US10950912B2 (en) * | 2017-06-14 | 2021-03-16 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
-
2019
- 2019-07-18 US US16/515,831 patent/US11611124B2/en active Active
-
2023
- 2023-03-21 US US18/124,461 patent/US20230223634A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20200052257A1 (en) | 2020-02-13 |
US11611124B2 (en) | 2023-03-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20230223634A1 (en) | Battery park | |
US11476539B1 (en) | Modular battery pack apparatus, systems, and methods including viral data and/or code transfer | |
CN204424329U (en) | Be suitable for the battery pack used together with hand held electric tool | |
US20110070465A1 (en) | Protection circuit module and battery including the protection circuit module and method of manufacturing the battery | |
US9825263B2 (en) | Battery pack | |
JP4351642B2 (en) | Soft cell built-in rechargeable battery and method of manufacturing the same | |
US20070207380A1 (en) | Battery pack | |
KR100812306B1 (en) | Battery pack | |
US20090123821A1 (en) | Protection circuit module for rechargeable battery and rechargeable battery pack including the same | |
US9088032B2 (en) | Secondary battery | |
JP2007157358A (en) | Battery pack | |
JP2008177156A (en) | Secondary battery case and battery pack containing this | |
JP4925725B2 (en) | Pack battery | |
JP6284709B2 (en) | Battery pack for electric tools | |
US9178195B2 (en) | Battery loading and unloading mechanism | |
JP2008027616A (en) | Battery pack and manufacturing method of battery pack | |
KR100649659B1 (en) | A battery pack for a portable terminal and the method of manufacturing thereof | |
KR100601502B1 (en) | Pack secondary battery | |
US20060024575A1 (en) | Sealed battery pack | |
JP2004319314A (en) | Battery pack and method of manufacturing pack case used in this | |
JP2007103284A (en) | Lithium ion battery pack | |
JP3504621B2 (en) | Battery module and its positioning structure | |
CN211378414U (en) | Circuit board assembly and battery pack with same | |
JP4215480B2 (en) | Card type electronic equipment | |
KR100709868B1 (en) | Pack case for secondary battery |