CN218039739U - Battery pack, battery device and electric equipment - Google Patents

Battery pack, battery device and electric equipment Download PDF

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Publication number
CN218039739U
CN218039739U CN202221933190.9U CN202221933190U CN218039739U CN 218039739 U CN218039739 U CN 218039739U CN 202221933190 U CN202221933190 U CN 202221933190U CN 218039739 U CN218039739 U CN 218039739U
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shell
electrode
transmission end
signal acquisition
battery
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CN202221933190.9U
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赵冬
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China Lithium Battery Technology Co Ltd
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China Lithium Battery Technology Co Ltd
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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

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Abstract

The utility model discloses a group battery, battery device and consumer, when the total transmission end of second set up with the different end of signal acquisition portion, the total transmission end of second is connected with corresponding casing electricity, and the total transmission end of second corresponds the casing is connected with signal acquisition portion electricity, and signal acquisition portion can gather the total transmission end's of second potential through the casing, is favorable to signal acquisition portion to determine the voltage signal of the total transmission end of second monomer battery that corresponds. Because the first shell can be at a low potential and the second shell can be at a high potential, when the second total transmission end is a total negative transmission end, the shell corresponding to the total negative transmission end can be at a low potential, and when the second total transmission end is a total positive transmission end, the shell corresponding to the total positive transmission end can be at a high potential, so that the shell corresponding to the second total transmission end has a certain potential, the corrosion of the shell corresponding to the second total transmission end is avoided, and the corrosion resistance of the shell corresponding to the second total transmission end is improved.

Description

Battery pack, battery device and electric equipment
Technical Field
The utility model relates to a battery technology field indicates a group battery, battery device and consumer especially.
Background
In order to collect the voltage of each battery cell in the battery pack, a corresponding voltage collecting part may be provided for each battery pack, wherein the voltage collecting part may be provided at an end portion of the battery pack that is provided along a length direction of the battery cell, and when the positive electrode and the negative electrode of the battery cell are provided at both ends along the length direction of the battery cell, how to electrically connect the voltage collecting part with the positive electrode and the negative electrode of each battery cell so as to collect the voltage of each battery cell becomes more important.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a group battery, battery device and consumer for gather battery cell's voltage.
In a first aspect, an embodiment of the present invention provides a battery pack, including: a plurality of unit cells, at least some of which are connected in series; the unit cell includes: the electrode structure comprises a shell, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged at two ends of the shell along a first direction; the first electrode of one single battery is used as a first total transmission end of the battery pack, and the second electrode of the other single battery is used as a second total transmission end of the battery pack; the first total transmission end and the second total transmission end are positioned at different ends of the shell along the first direction; further comprising:
the signal acquisition part is arranged at the same end of the shell along the first direction, the first total transmission end and the signal acquisition part are arranged at different ends of the shell, and the second total transmission end is electrically connected with the corresponding shell;
along the first direction, the first electrode and the second electrode which are positioned at the same end of the shell of the signal acquisition part and the shell corresponding to the second total transmission end are electrically connected with the signal acquisition part;
the first direction is perpendicular to the arrangement direction of the single batteries and perpendicular to one side surface of the signal acquisition part facing the single batteries; the second electrode is a negative electrode, and the second total transmission end corresponds to the first shell; or, the second electrode is a positive electrode, and the second total transmission end corresponds to the second shell; the preparation material of first casing includes: steel, copper or iron; the second shell is made of aluminum.
When the second total transmission end is arranged at the different end of the signal acquisition part, because the second total transmission end is electrically connected with the corresponding shell, if the shell corresponding to the second total transmission end is electrically connected with the signal acquisition part, the signal acquisition part can acquire the potential of the second total transmission end through the shell; when the first electrode of the single battery corresponding to the second total transmission end is electrically connected with the signal acquisition part, the signal acquisition part can acquire the voltage signal of the single battery corresponding to the second total transmission end, so that the voltage acquisition of the single battery corresponding to the second total transmission end is realized. And because the first shell can be in the low potential, the second shell can be in the high potential, so when the second electrode is the negative pole, the second is always the transmission end of negative, and then the shell that always negative transmission end corresponds can be in the low potential, when the second electrode is anodal, the second is always the transmission end of positive, and then always the transmission end of positive corresponds the shell can be in the high potential, avoid first shell and second shell unusual. In addition, the second total transmission end is electrically connected with the corresponding shell, so that the second total transmission end has a certain potential corresponding to the shell, the shell corresponding to the second total transmission end is prevented from being corroded, and the corrosion resistance of the shell corresponding to the second total transmission end is improved.
In a second aspect, an embodiment of the present invention provides a battery device, including: the battery pack comprises a box body and a battery pack positioned in the box body;
the group battery is like the utility model discloses the above-mentioned group battery that the embodiment provided.
In a third aspect, an embodiment of the present invention provides an electrical device, including: the embodiment of the utility model provides an above-mentioned battery device.
Drawings
Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another battery pack provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another battery pack provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another battery pack provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another battery pack provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another battery pack provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a battery device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electric device provided in an embodiment of the present invention.
10-single battery, 11-shell, 12-first electrode, 13-second electrode, 21-first total transmission end, 22-second total transmission end, 30-signal acquisition part, 110-box, 120-battery pack, 130-battery management system, 140-high voltage distribution box, 150-charging and discharging port.
Detailed Description
The following provides a detailed description of a battery pack, a battery device and an electric device according to embodiments of the present invention with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The embodiment of the utility model provides a battery pack can include: a plurality of unit cells, at least some of which are connected in series.
Wherein, as shown in fig. 1, 2 and 6, the respective unit cells 10 are connected in series; alternatively, as shown in fig. 3 to 5, some of the unit cells 10 are connected in parallel and then connected in series with other unit cells 10.
When some of the unit cells 10 are connected in series, the electrical connection relationship between the unit cells 10 is not limited to that shown in fig. 3 to 5, and the specific electrical connection relationship may be set according to actual needs, and is not limited herein.
The number of the unit batteries 10 included in the battery pack is not limited to the number shown in fig. 1 to 6, and may be other numbers provided according to actual needs, and is not limited thereto, and the description is given only by way of example shown in fig. 1 to 6.
The unit cell includes: the electrode structure comprises a shell, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged at two ends of the shell along a first direction; the first electrode of one single battery is used as a first total transmission end of the battery pack, and the second electrode of the other single battery is used as a second total transmission end of the battery pack; along the first direction, the first total transmission end and the second total transmission end are located at different ends of the shell.
Referring to fig. 1 to 6, wherein the first direction is a direction F1, and the direction F1 shown in the drawings is a vertical direction, the first electrode 12 and the second electrode 13 may be respectively disposed at the upper end and the lower end of the housing 11;
also, the first electrode 12 may be a positive electrode, and the second electrode 13 may be a negative electrode, in which case: the first total transmission end 21 is a total positive transmission end, the second total transmission end 22 is a total negative transmission end, and the total positive transmission end and the total negative transmission end are respectively arranged at the upper end and the lower end of the shell 11;
alternatively, the first electrode 12 may be a negative electrode and the second electrode 13 may be a positive electrode, in which case: the first total transmission terminal 21 is a total negative transmission terminal, the second total transmission terminal 22 is a total positive transmission terminal, and the total positive transmission terminal and the total negative transmission terminal are respectively disposed at the upper and lower ends of the housing 11.
The battery pack further includes:
the signal acquisition part is arranged along a first direction, the first total transmission end and the signal acquisition part are positioned at the same end of the shell, the second total transmission end and the signal acquisition part are positioned at the different end of the shell, and the second total transmission end is electrically connected with the corresponding shell;
along the first direction, the first electrode and the second electrode which are positioned at the same end of the shell as the signal acquisition part and the shell corresponding to the second total transmission end are electrically connected with the signal acquisition part;
the first direction is vertical to the arrangement direction of each single battery and vertical to the surface of one side of the signal acquisition part facing the single battery; the second electrode is a negative electrode, and the second total transmission end corresponds to the first shell; or, the second electrode is a positive electrode, and the second total transmission end corresponds to the second shell; the preparation material of first casing includes: steel, copper or iron; the second shell is made of aluminum.
As shown in fig. 1 to 6, the arrangement direction of each unit cell 10 is the F2 direction, the first direction is the F1 direction, the F1 direction is perpendicular to the F2 direction, the surface of the side of the signal collection part 30 facing the unit cell 10 is the surface indicated by k1, due to the problem of the angles shown in fig. 1 to 6, the surface indicated by k1 is one side of the block for representing the signal collection part 30 in the drawing, the upper side of the block indicated by 30 in fig. 1 and 6, or the lower side of the block indicated by 30 in fig. 2 to 5, and the F1 direction is perpendicular to the surface indicated by k 1.
In fig. 1, the first electrode 12 is a negative electrode, the first overall transmission terminal 21 is an overall negative transmission terminal, and the overall negative transmission terminal is located at the lower end of the housing 11; the second electrode 13 is a positive electrode, the second total transmission end 22 is a total positive transmission end, when the total positive transmission end is located at the upper end of the shell 11, the signal acquisition part 30 is located at the lower end of the shell 11, and the signal acquisition part 30 and the total negative transmission end (i.e., the first total transmission end 21) are both located at the lower end of the shell 11; and, the total positive transmission terminal (i.e., the second total transmission terminal 22) is electrically connected with the corresponding housing 11;
alternatively, in fig. 2 to 4, the first electrode 12 is a positive electrode, the first total transmission end 21 is a total positive transmission end, and the total positive transmission end is located at the upper end of the housing 11; the second electrode 13 is a negative electrode, the second total transmission end 22 is a total negative transmission end, when the total negative transmission end is located at the lower end of the shell 11, the signal acquisition part 30 is located at the upper end of the shell 11, and both the signal acquisition part 30 and the total positive transmission end (i.e., the first total transmission end 21) are located at the upper end of the shell 11; and, the overall negative transmission end (i.e., the second overall transmission end 22) is electrically connected with the corresponding housing 11.
In addition, taking fig. 1 as an example, in order to facilitate the signal acquisition unit 30 to acquire signals (such as voltage) of each single battery 10, a negative electrode of the leftmost single battery 10, which is disposed close to the signal acquisition unit 30, a positive electrode of the middle single battery 10, which is disposed close to the signal acquisition unit 30, a negative electrode of the rightmost single battery 10, which is disposed close to the signal acquisition unit 30, and the casing 11 of the leftmost single battery 10 may be electrically connected to the signal acquisition unit 30;
at this point, since the positive electrode of the leftmost unit cell 10 is located on the side of the case 11 away from the signal collecting unit 30 as the total positive transmission end (i.e., the second total transmission end 22), the positive electrode is electrically connected to the case 11, so that the positive electrode is at the same potential as the case 11, and when the case 11 is electrically connected to the signal collecting unit 30, the signal collecting unit 30 can collect the potential of the positive electrode.
Therefore, when the second total transmission end is arranged at the different end of the signal acquisition part, because the second total transmission end is electrically connected with the corresponding shell, if the shell corresponding to the second total transmission end is electrically connected with the signal acquisition part, the signal acquisition part can acquire the potential of the second total transmission end through the shell; when the first electrode of the single battery corresponding to the second total transmission end is electrically connected with the signal acquisition part, the signal acquisition part can acquire the voltage signal of the single battery corresponding to the second total transmission end, so that the acquisition of the voltage of the single battery corresponding to the second total transmission end is realized.
And, because of first casing can be in the low potential (because of steel, iron or copper can be in the low potential), the second casing can be in high potential (because of aluminium can be in high potential), so when the second electrode is the negative pole, the second is total transmission end for total negative transmission end, and then the casing that total negative transmission end corresponds can be in the low potential, when the second electrode is anodal, the second is total transmission end for total positive transmission end, and then the casing that total positive transmission end corresponds can be in high potential, avoid first casing and second casing unusual.
In addition, because the second total transmission end is electrically connected with the corresponding shell, the shell corresponding to the second total transmission end has a certain potential, so that the shell corresponding to the second total transmission end is prevented from being corroded, and the corrosion resistance of the shell corresponding to the second total transmission end is improved.
It is emphasized that when the second casing is made of aluminum, the second casing can have certain compressibility; when the battery pack is mounted, the convenience of mounting the battery pack can be increased; and because the quality of aluminium is lighter, adopt aluminium preparation second casing, can also be favorable to reducing the weight of group battery.
Since steel, iron or copper has a good mechanical strength (especially steel), when the first case is made of steel, iron or copper, the mechanical strength of the battery pack can be improved; particularly, when the single battery with the first shell is positioned at the outermost side of all the single batteries, the first shell is less deformed after expansion, so that better safety performance can be obtained, and adverse effects on other surrounding structures when the single battery expands due to thermal runaway are avoided.
In some embodiments, the first electrode is a positive electrode and the second electrode is a negative electrode; at this time, the first total transmission end is a total positive transmission end, and the second total transmission end is a total negative transmission end;
or the first electrode is a negative electrode, and the second electrode is a positive electrode; at this time, the first total transmission end is a total negative transmission end, and the second total transmission end is a total positive transmission end.
Specifically, the first electrode and the second electrode may be disposed according to actual needs, and further, the first total transmission end and the second total transmission end may be disposed, which is not limited herein.
The first total transmission end and the signal acquisition part are arranged at the same end, so the first total transmission end can be directly and electrically connected with the signal acquisition part; because the second total transmission end is arranged at the different end of the signal acquisition part, when the second total transmission end is electrically connected with the corresponding shell, the corresponding shell is electrically connected with the signal acquisition part so as to realize equipotential transmission; in the battery pack, the specific setting manner of the remaining single batteries except the single battery corresponding to the second total transmission end may include:
mode 1:
in some embodiments, in the remaining unit cells except the unit cell corresponding to the second total transmission end: along the first direction, at least part of the positive electrode of the signal acquisition part, which is positioned at the different end of the shell, is electrically connected with the corresponding shell;
the shell electrically connected with the positive electrode is also electrically connected with the signal acquisition part.
For example, as shown in fig. 3, the first electrode 12 is a positive electrode, and the second electrode 13 is a negative electrode, wherein the first total transmission terminal 21 is a total positive transmission terminal, and the second total transmission terminal 22 is a total negative transmission terminal;
in order from left to right, the five unit cells 10 shown in fig. 3 are respectively noted as: the battery pack comprises a single battery 1, a single battery 2, a single battery 3, a single battery 4 and a single battery 5;
the total negative transmission terminal corresponds to the unit cell 4, so the remaining unit cells 10 include: the battery pack comprises a single battery 1, a single battery 2, a single battery 3 and a single battery 5;
along the first direction (i.e., the F1 direction), the positive electrode located at the opposite end of the housing 11 from the signal collecting part 30 (i.e., located at the opposite end from the signal collecting part 30) includes: the positive electrode of the unit cell 2 and the positive electrode of the unit cell 3, and at this time:
the positive electrode of the single battery 2 is not connected with the shell 11 of the single battery 2;
the positive electrode of the single battery 3 is electrically connected to the case 11 of the single battery 3, and the case 11 of the single battery 3 is also electrically connected to the signal acquisition unit 30.
For another example, as shown in fig. 1, the first electrode 12 is a negative electrode, and the second electrode 13 is a positive electrode, wherein the first total transmission terminal 21 is a total negative transmission terminal, and the second total transmission terminal 22 is a total positive transmission terminal;
in order from left to right, the three unit cells 10 shown in fig. 1 are respectively noted as: a single battery 1, a single battery 2, and a single battery 3;
the total positive transmission terminal corresponds to the unit cell 1, so the remaining unit cells 10 include: a single battery 2, a single battery 3;
along the first direction (i.e., the F1 direction), the positive electrode located at the end different from the housing 11 (i.e., located at the end different from the signal collecting part 30) with the signal collecting part 30 includes: positive electrode of the single cell 3, at this time:
the positive electrode of the single battery 3 is electrically connected to the case 11 of the single battery 3, and the case 11 of the single battery 3 is also electrically connected to the signal acquisition unit 30.
Therefore, for the rest of the single batteries, at least part of the positive electrodes arranged at the different ends of the signal acquisition part can be electrically connected with the corresponding shell, so that the shell can have the potential of the corresponding positive electrode, and equipotential transmission is realized; when the shell is electrically connected with the signal acquisition part, the signal acquisition part can acquire the corresponding positive potential through the shell; because the negative electrodes arranged at the same end of the signal acquisition part are electrically connected with the signal acquisition part, the signal acquisition part can acquire the signals of the single batteries corresponding to the positive electrodes arranged at the different ends of the signal acquisition part, and the acquisition of the signals is realized through the equipotential transmission of the shell.
It should be noted that, in the remaining single batteries, at least a part of the positive electrodes disposed at the different ends of the signal collecting part are electrically connected to the corresponding housing, and the method specifically includes:
taking fig. 3 as an example, the positive electrodes of the second cell (cell 2) and the third cell (cell 3) from the left are all disposed at different ends of the signal collecting part 30, and when the two cells 10 are connected in parallel, the positive electrodes of the two cells 10 are electrically connected, and assuming that, in the two cells 10, only the positive electrode of the cell 3 is electrically connected to the corresponding housing 11, the positive electrode of the cell 2, the positive electrode of the cell 3, and the housing 11 of the cell 3 are equipotential, when the housing 11 of the cell 3 is electrically connected to the signal collecting part 30, the signal collecting part 30 can collect the potentials of the positive electrode of the cell 2 and the positive electrode of the cell 3, and the signal collecting part 30 does not need to be electrically connected to the housing 11 of the cell 2.
Therefore, the number of the electric connections can be reduced, the manufacturing process is simplified, and the manufacturing cost is reduced.
Alternatively, taking fig. 4 as an example, when the positive electrodes of the second cell (referred to as the cell 2) and the third cell (referred to as the cell 3) from the left are both disposed at the opposite ends of the signal collecting unit 30, and the two cells 10 are connected in parallel, the positive electrodes of the two cells 10 are electrically connected to the corresponding housing 11, and the housings 11 of the two cells 10 are also electrically connected to the signal collecting unit 30, so that the signal collecting unit 30 can collect the potentials of the positive electrodes of the two cells 10.
So, when the electric connection relation that can avoid two battery cells of parallel connection appears unusually, still can gather anodal electric potential through corresponding the casing, guarantee that signal acquisition portion can gather each battery cell's voltage effectively.
In some embodiments, the housing electrically connected to the positive electrode is a second housing.
Because the second shell is made of aluminum and the aluminum can be at a high potential, the anode arranged at the different end of the signal acquisition part can be electrically connected with the second shell made of aluminum, so that the corrosion resistance of the shell electrically connected with the anode can be improved while the equipotential transmission is realized, and the reliability of the battery pack is improved.
Mode 2:
in some embodiments, in the remaining unit cells except the unit cell corresponding to the second total transmission end: along the first direction, at least part of the negative electrode of the signal acquisition part, which is positioned at the different end of the shell, is electrically connected with the corresponding shell;
the shell electrically connected with the negative electrode is also electrically connected with the signal acquisition part.
For example, as shown in fig. 2, the first electrode 12 is a positive electrode, and the second electrode 13 is a negative electrode, wherein the first total transmission terminal 21 is a total positive transmission terminal, and the second total transmission terminal 22 is a total negative transmission terminal;
in order from left to right, the five unit cells 10 shown in fig. 2 are respectively noted as: the battery pack comprises a single battery 1, a single battery 2, a single battery 3, a single battery 4 and a single battery 5;
the total negative transmission terminal corresponds to the unit cell 5, so the remaining unit cells 10 include: the battery pack comprises a single battery 1, a single battery 2, a single battery 3 and a single battery 4;
along the first direction (i.e., the F1 direction), the negative electrode located at the end different from the housing 11 (i.e., located at the end different from the signal collecting part 30) with the signal collecting part 30 includes: the negative electrode of the unit cell 1 and the negative electrode of the unit cell 3, and at this time:
the cathode of the single battery 1 is electrically connected with the shell 11 of the single battery 1, and the shell 11 of the single battery 1 is also electrically connected with the signal acquisition part 30;
the negative electrode of the battery cell 3 is electrically connected to the case 11 of the battery cell 3, and the case 11 of the battery cell 3 is also electrically connected to the signal acquisition unit 30.
For another example, as shown in fig. 6, the first electrode 12 is a negative electrode, and the second electrode 13 is a positive electrode, wherein the first total transmission port 21 is a total negative transmission port, and the second total transmission port 22 is a total positive transmission port;
in order from left to right, the five unit cells 10 shown in fig. 6 are respectively noted as: the battery pack comprises a single battery 1, a single battery 2, a single battery 3, a single battery 4 and a single battery 5;
the total positive transmission terminal corresponds to the unit cell 1, so the remaining unit cells include: a single battery 2, a single battery 3, a single battery 4 and a single battery 5;
along the first direction (i.e., the F1 direction), the negative electrode located at the opposite end of the housing 11 from the signal acquisition part 30 (i.e., located at the opposite end from the signal acquisition part 30) includes: negative electrode of the cell 2, negative electrode of the cell 4, and in this case:
the cathode of the single battery 2 is electrically connected with the shell 11 of the single battery 2, and the shell 11 of the single battery 2 is also electrically connected with the signal acquisition part 30;
the negative electrode of the battery cell 4 is electrically connected to the case 11 of the battery cell 4, and the case 11 of the battery cell 4 is also electrically connected to the signal acquisition unit 30.
Therefore, for the rest single batteries, at least part of the negative electrodes arranged at the different ends of the signal acquisition part can be electrically connected with the corresponding shell, so that the shell can have the potential of the corresponding negative electrode, and equipotential transmission is realized; when the shell is electrically connected with the signal acquisition part, the signal acquisition part can acquire the corresponding potential of the cathode through the shell; because the positive electrode arranged at the same end of the signal acquisition part is electrically connected with the signal acquisition part, the signal acquisition part can acquire the signal of the single battery corresponding to the negative electrode arranged at the different end of the signal acquisition part, and the acquisition of the signal is realized through the equipotential transmission of the shell.
In this mode 2, a specific explanation that at least a part of the negative electrode disposed at the end opposite to the signal collecting part is electrically connected to the corresponding case in the remaining unit cells can be seen in a specific embodiment of the above mode 1 that at least a part of the positive electrode disposed at the end opposite to the signal collecting part is electrically connected to the corresponding case in the remaining unit cells, and details thereof are not described herein.
In some embodiments, the housing electrically connected to the negative electrode is the first housing.
Because the first shell is made of steel, iron or copper, and the steel can be at a low potential by taking the steel as an example, the cathode arranged at the different end of the signal acquisition part can be electrically connected with the first shell made of the steel, so that the corrosion resistance of the shell electrically connected with the cathode can be improved while the equipotential transmission is realized, and the reliability of the battery pack is improved.
Mode 3:
in some embodiments, in the remaining unit cells except the unit cell corresponding to the second total transmission end:
along the first direction, at least part of the positive electrodes of the signal acquisition parts, which are positioned at the different ends of the shell, are electrically connected with the corresponding shell; the shell electrically connected with the positive electrode is also electrically connected with the signal acquisition part;
and at least part of the negative electrode of the signal acquisition part positioned at the different end of the shell is electrically connected with the corresponding shell along the first direction; the shell electrically connected with the negative electrode is also electrically connected with the signal acquisition part.
For example, as shown in fig. 5, the first electrode 12 is a positive electrode, and the second electrode 13 is a negative electrode, wherein the first total transmission terminal 21 is a total positive transmission terminal, and the second total transmission terminal 22 is a total negative transmission terminal;
the four unit cells 10 shown in fig. 5 are respectively noted as: the battery pack comprises a single battery 1, a single battery 2, a single battery 3 and a single battery 4;
the total negative transmission terminal corresponds to the unit cell 4, so the remaining unit cells 10 include: a single battery 1, a single battery 2 and a single battery 3;
along a first direction (i.e., the F1 direction), the positive electrode located at the opposite end of the housing 11 from the signal acquisition part 30 includes: the positive electrode of the single battery 2 and the positive electrode of the single battery 3, and the negative electrode of the signal acquisition part 30 at the opposite end of the housing 11 include: negative electrode of the unit cell 1, at this time:
the cathode of the single battery 1 is electrically connected with the shell 11 of the single battery 1, and the shell 11 of the single battery 1 is also electrically connected with the signal acquisition part 30;
the positive electrode of the single battery 2 is electrically connected with the shell 11 of the single battery 2, and the shell 11 of the single battery 2 is also electrically connected with the signal acquisition part 30;
the positive electrode of the single battery 3 is electrically connected to the case 11 of the single battery 3, and the case 11 of the single battery 3 is also electrically connected to the signal acquisition unit 30.
Therefore, for the rest of the single batteries, at least part of the positive electrodes and at least part of the negative electrodes arranged at the different ends of the signal acquisition part can be electrically connected with the corresponding shell, so that the shell can have the corresponding potentials of the positive electrodes (and the negative electrodes) to realize equipotential transmission; when the shell is electrically connected with the signal acquisition part, the signal acquisition part can acquire the corresponding positive (and negative) potentials through the shell; because the negative pole and the positive pole which are arranged at the same end of the signal acquisition part are electrically connected with the signal acquisition part, the signal acquisition part can acquire the signals of the single batteries corresponding to the positive pole and the negative pole which are arranged at the different end of the signal acquisition part, and therefore the acquisition of the signals is realized through the equipotential transmission of the shell.
In this mode 3, a specific explanation that at least a part of the negative electrode (and the positive electrode) disposed at the end different from the signal collection portion is electrically connected to the corresponding case in the remaining unit cells can be found in the specific embodiment of mode 1 in which at least a part of the positive electrode disposed at the end different from the signal collection portion is electrically connected to the corresponding case, and will not be described in detail.
Further, the case electrically connected to the negative electrode and the case electrically connected to the positive electrode may be arranged in the manner described in the above manner 1 and manner 2, and will not be described in detail.
In summary, in the remaining unit cells, there may be provided:
at least part of the positive electrode arranged at the different end of the signal acquisition part is electrically connected with the corresponding shell;
or at least part of the negative electrode arranged at the different end of the signal acquisition part is electrically connected with the corresponding shell;
or at least part of the positive electrode and at least part of the negative electrode arranged at the different ends of the signal acquisition part are electrically connected with the corresponding shell.
In actual conditions, the electrical connection relation between the anode and the cathode arranged at the different ends of the signal acquisition part and the corresponding shell can be selected according to actual needs, so that the needs of different application scenes are met, and the design flexibility is improved.
In some embodiments, some of the cells are connected in series, and the cells are provided in an odd number or an even number.
For example, as shown in fig. 3, 5 single batteries are shown, a single battery 2 and a single battery 3 are connected in parallel to form a parallel structure 1, a single battery 4 and a single battery 5 are connected in parallel to form a parallel structure 2, and the single battery 1, the parallel structure 1 and the parallel structure 2 are connected in series;
alternatively, as shown in fig. 5, 4 single batteries are shown, the single batteries 2 and 3 are connected in parallel to form a parallel structure 1, and the single batteries 1, the parallel structure 1 and the single batteries 4 are connected in series.
Therefore, when some of the single batteries are connected in series, the number of the single batteries may be an odd number or an even number, and may be specifically set according to actual needs, which is not limited herein.
In some embodiments, the individual cells are connected in series, with an odd number of cells being provided.
For example, as shown in fig. 2, 5 unit cells are shown, and the unit cells are connected in series.
It should be noted that, for each single battery, whether some single batteries are connected in series or all single batteries are connected in series, the number of the single batteries is not limited herein as long as it is ensured that the first total transmission end and the second total transmission end are respectively located at two ends of the housing.
In some embodiments, the signal collecting portion may be, but is not limited to, a flexible circuit board, or other structures that can implement the signal collecting portion, and is not limited herein.
Next, a process of collecting the voltage by the signal collecting unit 30 will be described by taking the example shown in fig. 1 as an example.
For the single cell 1:
the negative electrode of the single battery 1 is electrically connected with the signal acquisition part 30, and the signal acquisition part 30 can directly acquire the potential of the negative electrode of the single battery 1; the positive electrode of the single battery 1 is electrically connected to the housing 11 of the single battery 1 as the second total transmission end 22, so that the positive electrode of the single battery 1 is equipotential to the housing 11 of the single battery 1, and when the housing 11 of the single battery 1 is electrically connected to the signal acquisition portion 30, the signal acquisition portion 30 can acquire the positive electrode potential of the single battery 1 through the housing 11 of the single battery 1, thereby determining the voltage of the single battery 1.
For the single cell 2:
the positive electrode of the single battery 2 is electrically connected with the signal acquisition part 30, and the signal acquisition part 30 can directly acquire the potential of the positive electrode of the single battery 2; the negative pole of the single battery 2 is electrically connected with the positive pole of the single battery 3, and the positive pole of the single battery 3 is electrically connected with the shell 11 of the single battery 3, so that the positive pole of the single battery 3, the shell 11 of the single battery 3 and the negative pole of the single battery 2 are equipotential, when the shell 11 of the single battery 3 is electrically connected with the signal acquisition part 30, the signal acquisition part 30 can acquire the potential of the negative pole of the single battery 2 through the shell 11 of the single battery 3, and thus the voltage of the single battery 2 can be determined.
For the single cell 3:
the negative electrode of the single battery 3 is electrically connected with the signal acquisition part 30, and the signal acquisition part 30 can directly acquire the potential of the negative electrode of the single battery 3; the positive electrode of the single battery 3 is electrically connected with the casing 11 of the single battery 3, so that the positive electrode of the single battery 3 is equipotential with the casing 11 of the single battery 3, and when the casing 11 of the single battery 3 is electrically connected with the signal acquisition part 30, the signal acquisition part 30 can acquire the positive potential of the single battery 3 through the casing 11 of the single battery 3, thereby determining the voltage of the single battery 3.
Based on the same utility model design, the embodiment of the utility model provides a battery device, as shown in fig. 7, include: a case 110, and a battery pack 120 located in the case 110;
battery pack 120 is the above battery pack provided by the embodiments of the present invention.
In some embodiments, the number of battery packs included in the battery device is not limited to one shown in fig. 7, and may be set to 2 or more, and may be specifically set according to actual needs, and is not limited herein.
In some embodiments, as shown in fig. 7, the battery device may further include:
the battery management system 130 can be electrically connected with the signal acquisition part and is used for managing each single battery;
the high voltage distribution box 140 may be electrically connected to the first and second total transmission terminals of the battery pack 110, and the charging/discharging port 150, and the high voltage distribution box 140 may be electrically connected to the charging/discharging port 150 to manage charging/discharging of the battery pack 110.
Of course, in some embodiments, the battery device may further include other structures besides the above structures, and may be specifically configured according to actual needs, which is not limited herein.
In some embodiments, the battery device may be, but is not limited to being, a battery pack.
Based on same utility model design, the embodiment of the utility model provides an electric equipment is provided, as shown in fig. 8, include: the embodiment of the present invention provides the above battery device 801.
In some embodiments, the powered device may be, but is not limited to being, an electric vehicle.
Of course, in some embodiments, the electric device may include, in addition to the battery device, other structures for implementing functions of the electric device, and may be specifically configured according to actual needs, which is not limited herein.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A battery pack, comprising: a plurality of unit cells, at least some of which are connected in series; the unit cell includes: the electrode structure comprises a shell, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged at two ends of the shell along a first direction; the first electrode of one single battery is used as a first total transmission end of the battery pack, and the second electrode of the other single battery is used as a second total transmission end of the battery pack; the first total transmission end and the second total transmission end are positioned at different ends of the shell along the first direction; further comprising:
the signal acquisition part is arranged at the same end of the shell along the first direction, the first total transmission end and the signal acquisition part are arranged at different ends of the shell, and the second total transmission end is electrically connected with the corresponding shell;
along the first direction, the first electrode and the second electrode which are positioned at the same end of the shell with the signal acquisition part and the shell corresponding to the second total transmission end are electrically connected with the signal acquisition part;
the first direction is perpendicular to the arrangement direction of the single batteries and perpendicular to one side surface of the signal acquisition part facing the single batteries; the second electrode is a negative electrode, and the second total transmission end corresponds to the first shell; or the second electrode is a positive electrode, and the second total transmission end corresponds to the second shell; the preparation material of first casing includes: steel, copper or iron; the second shell is made of aluminum.
2. The battery of claim 1, wherein the first electrode is a positive electrode and the second electrode is a negative electrode;
or, the first electrode is a negative electrode, and the second electrode is a positive electrode.
3. The battery pack according to claim 2, wherein among the remaining unit cells except the unit cell corresponding to the second total transmission terminal: along the first direction, at least part of the positive electrode of the signal acquisition part, which is positioned at the different end of the shell, is electrically connected with the corresponding shell;
the shell electrically connected with the positive electrode is also electrically connected with the signal acquisition part.
4. The battery of claim 3, wherein the housing in electrical connection with the positive electrode is the second housing.
5. The battery pack according to any one of claims 2 to 4, wherein, of the remaining unit cells except the unit cell corresponding to the second total transmission terminal: along the first direction, at least part of the negative electrode at the different end of the shell with the signal acquisition part is electrically connected with the corresponding shell;
the shell electrically connected with the negative electrode is also electrically connected with the signal acquisition part.
6. The battery of claim 5, wherein the housing in electrical connection with the negative electrode is the first housing.
7. The battery pack according to claim 1, wherein a part of the unit cells are connected in series, and the unit cells are provided with an odd number or an even number.
8. The battery pack according to claim 1, wherein the unit cells are connected in series, and the unit cells are provided in an odd number.
9. A battery device, comprising: the battery pack comprises a box body and a battery pack positioned in the box body;
the battery pack according to any one of claims 1 to 8.
10. An electrical device, comprising: the battery device of claim 9.
CN202221933190.9U 2022-07-26 2022-07-26 Battery pack, battery device and electric equipment Active CN218039739U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221933190.9U CN218039739U (en) 2022-07-26 2022-07-26 Battery pack, battery device and electric equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221933190.9U CN218039739U (en) 2022-07-26 2022-07-26 Battery pack, battery device and electric equipment

Publications (1)

Publication Number Publication Date
CN218039739U true CN218039739U (en) 2022-12-13

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