CN220021299U - Battery cell structure and battery pack - Google Patents
Battery cell structure and battery pack Download PDFInfo
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- CN220021299U CN220021299U CN202321165865.4U CN202321165865U CN220021299U CN 220021299 U CN220021299 U CN 220021299U CN 202321165865 U CN202321165865 U CN 202321165865U CN 220021299 U CN220021299 U CN 220021299U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 210000005069 ears Anatomy 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to a battery cell structure and battery package, the battery cell structure includes electric core (1) and switch module (2), electric core (1) include pole piece (10) and connect in at least two utmost point ears (20) of pole piece (10), at least two utmost point ears (20) include first utmost point ear (201) and second utmost point ear (202), first utmost point ear (201) with second utmost point ear (202) are connected respectively the both ends of length direction of pole piece (10), switch module (2) are including being used for the port (21) of being connected with external power source, when port (21) are connected external power source, port (21) with first utmost point ear (201) pole piece (10) and second utmost point ear (202) constitute heating circuit. The volume energy density of electric core can be guaranteed to this electric core structure, and can guarantee the heating effect to electric core.
Description
Technical Field
The disclosure relates to the technical field of power batteries, in particular to a battery cell structure and a battery pack.
Background
For the battery cell, the battery cell needs to be heated in a low-temperature environment, so that the temperature of the battery cell is increased. In the related art, at present, an additional resistor is generally arranged on the battery cell, and the battery cell is heated through the resistor, however, the thickness of the battery cell is inevitably increased by the heating mode, and the volume energy density of the battery cell is reduced.
Disclosure of Invention
The purpose of this disclosure is to provide a electric core structure, and this electric core structure can guarantee the volume energy density of electric core, and can guarantee the heating effect to electric core.
In order to achieve the above-mentioned purpose, the present disclosure provides a battery cell structure, the battery cell structure includes electric core and switch module, the electric core include the pole piece with connect in at least two utmost point ears of pole piece, at least two the utmost point ear includes first utmost point ear and second utmost point ear, first utmost point ear with the both ends of length direction of pole piece are connected respectively to the second utmost point ear, switch module is including being used for the port of being connected with external power source, when the port is connected external power source, the port with first utmost point ear, pole piece and the second utmost point ear constitutes heating circuit.
Optionally, the electric core includes positive pole piece and negative pole piece, the positive pole piece with all be connected with two at least on the negative pole piece the utmost point ear, just positive pole piece with the both ends of the respective length direction of negative pole piece all have respectively first utmost point ear with the second utmost point ear, the port is connected when external power source, the port with first utmost point ear and the second utmost point ear on positive pole piece and this positive pole piece constitute the heating circuit, perhaps, the port with the first utmost point ear and the second utmost point ear on negative pole piece and this negative pole piece constitute the heating circuit.
Optionally, the switch assembly includes a plurality of switches, a plurality of the switches include a first switch, a second switch, a third switch and a fourth switch, the first switch is connected between the port and the first tab of the positive pole piece, the second switch is connected between the port and the second tab of the positive pole piece, the third switch is connected between the port and the first tab of the negative pole piece, and the fourth switch is connected between the port and the second tab of the negative pole piece.
Optionally, the switch assembly has a first switch state and a second switch state that are switched to each other, in the first switch state, the first switch and the fourth switch are closed, and the second switch and the third switch are opened; in the second switch state, the first switch and the fourth switch are open, and the second switch and the third switch are closed.
Optionally, the switch assembly has a third switch state and a fourth switch state that are switched to each other, in the third switch state, the first switch and the third switch are closed, and the second switch and the fourth switch are opened; in the fourth switch state, the first switch and the third switch are opened, and the second switch and the fourth switch are closed.
Optionally, the battery cell structure includes controller and first temperature sensor, first tab department and the second tab department of anodal pole piece all are provided with first temperature sensor, the controller is used for according to first temperature sensor, control switch module is switched each other between first switch state and second switch state, perhaps control switch module is switched each other between third switch state and fourth switch state.
Optionally, the switch assembly has a fifth switch state in which the first switch and the second switch are closed and the third switch and the fourth switch are open.
Optionally, the switch assembly has a sixth switch state in which the first switch and the second switch are open and the third switch and the fourth switch are closed.
Optionally, the battery cell structure includes a controller and a second temperature sensor, the second temperature sensor is used for detecting the temperature of the battery cell, and the controller is used for controlling the switch assembly to switch to a fifth switch state or a sixth switch state according to the second temperature sensor.
According to a second aspect of the present disclosure, there is provided a battery pack including the cell structure as described above.
Through above-mentioned technical scheme, in the electric core structure that this disclosure provided, when the electric core is in low temperature environment, need heat the electric core, at this moment, can connect external power source on the port, like this, external power source's electric current can flow through the pole piece through heating loop, from this, this disclosure is under the mode that does not additionally introduce the heating piece, can utilize the resistance heat production of pole piece itself, promotes the temperature of electric core comparatively evenly, consequently, the volume energy density of electric core can be guaranteed to this disclosure's electric core structure. In addition, because the electric current that external power source provided can flow through first utmost point ear, pole piece and second utmost point ear in proper order, consequently, through connecting pole piece length direction's both ends respectively with first utmost point ear and second utmost point ear for the electric current can flow through the heat production area of pole piece as much as possible, consequently, the heat production volume of pole piece can effectively be guaranteed to such setting, guarantees the heating effect to the electric core.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a schematic view of a portion of a cell structure provided in accordance with an embodiment of the present disclosure;
fig. 2 is a schematic view of a portion of a cell structure provided according to an embodiment of the present disclosure.
Description of the reference numerals
1-battery cell, 10-pole piece, 20-pole lug, 201-first pole lug, 202-second pole lug, 11-positive pole piece, 12-negative pole piece, 13-first positive pole column, 14-second positive pole column, 15-first negative pole column, 16-second negative pole column, 17-shell, 18-diaphragm, 2-switch assembly, 21-port, 22-first switch, 23-second switch, 24-third switch, 25-fourth switch and 3-first temperature sensor.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In this disclosure, the terms "first" and "second" are used without an opposite description to distinguish one element from another without a sequential or importance.
According to an exemplary embodiment of the present disclosure, there is provided a battery cell structure, referring to fig. 1 and 2, the battery cell structure includes a battery cell 1 and a switch assembly 2, the battery cell 1 includes a pole piece 10 and at least two tabs 20 connected to the pole piece 10, the at least two tabs 20 include a first tab 201 and a second tab 202, the first tab 201 and the second tab 202 are respectively connected at two ends of the pole piece 10 in a length direction, the switch assembly 2 includes a port 21 for connection with an external power source, and when the port 21 is connected with the external power source, the port 21 and the first tab 201, the pole piece 10 and the second tab 202 form a heating circuit.
Through above-mentioned technical scheme, in the electric core structure that this disclosure provided, when electric core 1 is in under the low temperature environment, need heat electric core 1, at this moment, can connect external power source on port 21, like this, external power source's electric current can flow through pole piece 10 through heating circuit, from this, this disclosure is under the mode of not additionally introducing the heating piece, can utilize the resistance heat production of pole piece 10 itself, promotes the temperature of electric core 1 comparatively evenly, consequently, the volume energy density of electric core 1 can be guaranteed to this disclosure's electric core structure. In addition, since the current provided by the external power supply can sequentially flow through the first tab 201, the pole piece 10 and the second tab 202, the first tab 201 and the second tab 202 are respectively connected with the two ends of the pole piece 10 in the length direction, so that the current can flow through the heat generating area of the pole piece 10 as much as possible, and therefore, the heat generating amount of the pole piece 10 can be effectively ensured, and the heating effect of the battery cell 1 is ensured.
The type of the electrode sheet 10 is not limited in this disclosure, and the electrode sheet 10 may be the positive electrode sheet 11 of the battery cell 1 or the negative electrode sheet 12 of the battery cell 1. In addition, the present disclosure is not limited to the number of tabs 20 on the pole piece 10, and will be described in detail in the following embodiments. In addition, the port 21 of the present disclosure may also be connected to an electrical consumer, which will be described in detail in the following embodiments.
In an exemplary embodiment of the present disclosure, referring to fig. 1 and 2, the battery cell 1 may include a positive electrode tab 11 and a negative electrode tab 12, at least two tabs 20 are connected to each of the positive electrode tab 11 and the negative electrode tab 12, and a first tab 201 and a second tab 202 are respectively provided at two ends of each of the positive electrode tab 11 and the negative electrode tab 12 in a length direction, and when the port 21 is connected to an external power source, the port 21 and the positive electrode tab 11 and the first tab 201 and the second tab 202 on the positive electrode tab 11 form a heating circuit, or the port 21 and the negative electrode tab 12 and the first tab 201 and the second tab 202 on the negative electrode tab 12 form a heating circuit. Here, when the battery cell 1 is actually heated, the battery cell 1 may be heated by using heat generated by the positive electrode plate 11 itself, or the battery cell 1 may be heated by using heat generated by the negative electrode plate 12 itself, which may be adaptively designed according to needs in the present disclosure, for example, the positive electrode plate 11 and the negative electrode plate 12 may be made of metal foil materials, at this time, when the resistance of the positive electrode plate 11 is greater than the negative electrode plate 12, the battery cell 1 may be heated by using the positive electrode plate 11 with greater heat generation, and when the resistance of the positive electrode plate 11 is less than the negative electrode plate 12, the battery cell 1 may be heated by using the negative electrode plate 12 with greater heat generation.
In some embodiments of the present disclosure, referring to fig. 1 and 2, the switch assembly 2 may include a plurality of switches, which may include a first switch 22, a second switch 23, a third switch 24, and a fourth switch 25, the first switch 22 being connected between the port 21 and the first tab 201 of the positive electrode tab 11, the second switch 23 being connected between the port 21 and the second tab 202 of the positive electrode tab 11, the third switch 24 being connected between the port 21 and the first tab 201 of the negative electrode tab 12, the fourth switch 25 being connected between the port 21 and the second tab 202 of the negative electrode tab 12. Here, the battery cell 1 may further include a case 17, and a first positive electrode post 13, a second positive electrode post 14, a first negative electrode post 15, and a second negative electrode post 16 disposed on the case 17, wherein the first positive electrode post 13 is connected between the first switch 22 and the first tab 201 of the positive electrode tab 11, the second positive electrode post 14 is connected between the second switch 23 and the second tab 202 of the positive electrode tab 11, the first negative electrode post 15 is connected between the third switch 24 and the first tab 201 of the negative electrode tab 12, and the second negative electrode post 16 is connected between the fourth switch 25 and the second tab 202 of the negative electrode tab 12. Here, the switch assembly 2 can be switched to different switch states by closing and opening the first switch 22, the second switch 23, the third switch 24, and the fourth switch 25, respectively, thereby facilitating the heating of the battery cell 1 and the control of the charging and discharging of the battery cell 1.
In some embodiments of the present disclosure, referring to the illustrations in fig. 1 and 2, the switch assembly 2 may have a fifth switch state in which the first switch 22 and the second switch 23 are closed and the third switch 24 and the fourth switch 25 are open. Thus, when the port 21 is connected with an external power supply, the positive electrode plate 11, the first tab 201, the second tab 202 and the port 21 connected to the positive electrode plate 11 form a heating loop, and the current of the external power supply can flow through the positive electrode plate 11, so that the battery cell 1 can be heated by utilizing the heat generated by the positive electrode plate 11, and the low-temperature charging and discharging capacity of the battery cell 1 is improved.
In some embodiments of the present disclosure, referring to fig. 1 and 2, the switch assembly 2 may have a sixth switch state in which the first switch 22 and the second switch 23 are open and the third switch 24 and the fourth switch 25 are closed. Thus, when the port 21 is connected with an external power supply, the negative electrode pole piece 12, the first tab 201, the second tab 202 and the port 21 connected to the negative electrode pole piece 12 form a heating loop, and the current of the external power supply can flow through the negative electrode pole piece 12, so that the battery cell 1 can be heated by utilizing the heat generated by the negative electrode pole piece 12, and the low-temperature charging and discharging capacity of the battery cell 1 is improved.
Alternatively, the cell structure may include a controller (not shown in the drawing) and a second temperature sensor (not shown in the drawing), the second temperature sensor being configured to detect the temperature of the cell 1, and the controller being configured to control the switch assembly 2 to switch to the fifth switch state or the sixth switch state according to the second temperature sensor. Here, when the second temperature sensor detects that the temperature of the battery cell 1 is lower than the preset value, the controller may control the switch assembly 2 to switch to the fifth state, i.e., heat the battery cell by using the heat generated by the positive electrode tab 11 itself, or the controller may control the switch assembly 2 to switch to the sixth state, i.e., heat the battery cell by using the heat generated by the negative electrode tab 12 itself. According to some embodiments, the second temperature sensor may be configured as a thermocouple or a thermistor, which is not limited by the present disclosure.
Alternatively, referring to fig. 1, the battery cell 1 may include at least one electrode core including the separator 18 and the positive electrode tab 11 and the negative electrode tab 12 described above, wherein the electrode core may be configured as a laminated electrode core or a wound electrode core, where the battery cell 1 may be uniformly heated by heat conduction when the positive electrode tab 11 or the negative electrode tab 12 heats the battery cell 1. In addition, according to some embodiments, the pole piece may be configured as one of a lithium ion battery, a solid state lithium ion battery, a sodium ion battery, to which the present disclosure is not limited.
In some embodiments of the present disclosure, referring to fig. 1 and 2, the switch assembly 2 may have a first switch state and a second switch state that are switched to each other, in which the first switch 22 and the fourth switch 25 are closed, and the second switch 23 and the third switch 24 are open; in the second switching state, the first switch 22 and the fourth switch 25 are open, and the second switch 23 and the third switch 24 are closed. Here, in the first switch state, the battery cell 1 may be charged and discharged, for example, when the port 21 is connected to an external power source, the port 21 and the first tab 201 on the positive electrode tab 11, the negative electrode tab 12, and the second tab 202 on the negative electrode tab 12 form a charging circuit, and at this time, the battery cell 1 may be charged by the external power source; when the port 21 is connected with an electrical appliance, the port 21 and the first tab 201, the positive electrode tab 11, the negative electrode tab 12 and the second tab 202 on the negative electrode tab 12 on the positive electrode tab 11 form a discharge circuit, and at this time, the battery cell 1 can supply power to the electrical appliance, that is, in the first state, the port 21 and the first tab 201, the positive electrode tab 11, the negative electrode tab 12 and the second tab 202 on the negative electrode tab 12 form a charge-discharge circuit. Similarly, in the second switch state, the battery cell 1 may be charged or discharged, for example, when the port 21 is connected to an external power source, the port 21 forms a charging loop with the first tab 201 on the negative electrode tab 12, the positive electrode tab 11, and the second tab 202 on the positive electrode tab 11, and at this time, the battery cell 1 may be charged by using the external power source; when the port 21 is connected with the electric appliance, the port 21 forms a discharge loop with the first tab 201 on the negative electrode pole piece 12, the positive electrode pole piece 11 and the second tab 202 on the positive electrode pole piece 11, and at this time, the battery cell 1 can supply power to the electric appliance. Here, since the switch assembly 2 can be switched between the first switch state and the second switch state, when the temperature of the first tab 201 on the positive electrode tab 11 and/or the temperature of the second tab 202 on the negative electrode tab 12 are too high in the first switch state, the switch assembly 2 can be switched to the second switch state, and at this time, the current flows through the first tab 201 on the negative electrode tab 12 and the second tab 202 on the positive electrode tab 11, so that the first tab 201 on the positive electrode tab 11 and/or the temperature of the second tab 202 on the negative electrode tab 12 is too high can be prevented by switching the charge-discharge circuit to shunt, the overcurrent capacity of the tab 20 of the battery cell 1 is improved, the power output of the battery cell 1 is improved, and the high-power output of the battery cell 1 can be realized at normal temperature or high temperature. Similarly, when the temperature of the first tab 201 on the negative electrode plate 12 and/or the second tab 202 on the positive electrode plate 11 is too high in the second switch state, the switch assembly 2 can be switched to the first switch state, and at this time, current flows through the first tab 201 on the positive electrode plate 11 and the second tab 202 on the negative electrode plate 12, so that the overcurrent capacity of the tab 20 of the battery cell 1 can be improved, the power output of the battery cell 1 can be improved, and high-power output of the battery cell 1 can be realized at normal temperature or high temperature.
In some embodiments of the present disclosure, referring to the illustrations in fig. 1 and 2, the switch assembly 2 has a third switch state and a fourth switch state that are switched to each other, in which the first switch 22 and the third switch 24 are closed, and the second switch 23 and the fourth switch 25 are open; in the fourth switch state, the first switch 22 and the third switch 24 are open, and the second switch 23 and the fourth switch 25 are closed. Here, in the third switch state, the battery cell 1 may be charged and discharged, for example, when the port 21 is connected to an external power source, the port 21 and the first tab 201 on the positive electrode tab 11, the negative electrode tab 12, and the first tab 201 on the negative electrode tab 12 form a charging circuit, and at this time, the battery cell 1 may be charged by the external power source; when the port 21 is connected with the electric appliance, the port 21 forms a discharge loop with the first tab 201 on the positive electrode pole piece 11, the negative electrode pole piece 12 and the first tab 201 on the negative electrode pole piece 12, and at this time, the battery cell 1 can supply power to the electric appliance. Similarly, in the fourth switching state, the battery cell 1 may be charged or discharged, for example, when the port 21 is connected to an external power source, the port 21 forms a charging loop with the second tab 202 on the negative electrode tab 12, the positive electrode tab 11, and the second tab 202 on the positive electrode tab 11, and at this time, the battery cell 1 may be charged by using the external power source; when the port 21 is connected with the electric appliance, the port 21 forms a discharge loop with the second lug 202 on the negative electrode pole piece 12, the positive electrode pole piece 11 and the second lug 202 on the positive electrode pole piece 11, and at this time, the battery cell 1 can supply power for the electric appliance. Here, since the switch assembly can be switched between the third switch state and the fourth switch state, when the temperature of the first tab 201 on the positive electrode tab 11 and/or the temperature of the first tab 201 on the negative electrode tab 12 are too high in the third switch state, the switch assembly 2 can be switched to the fourth switch state, and at this time, the current flows through the second tab 202 on the negative electrode tab 12 and the second tab 202 on the positive electrode tab, so that the first tab 201 on the positive electrode tab 11 and/or the temperature of the first tab 201 on the negative electrode tab 12 is too high, the overcurrent capacity of the tab 20 of the battery core 1 is improved, the power output of the battery core 1 is improved, and the high-power output of the battery core 1 can be realized at normal temperature or high temperature. Similarly, when the temperature of the second tab 202 on the negative electrode plate 12 and/or the temperature of the second tab 202 on the positive electrode plate 11 are too high in the fourth switching state, the switching assembly 2 can be switched to the third switching state, and at this time, current flows through the first tab 201 on the positive electrode plate 11 and the first tab 201 on the negative electrode plate 12, so that the overcurrent capacity of the tab 20 of the battery cell 1 can be improved, the power output of the battery cell 1 can be improved, and the high-power output of the battery cell 1 can be realized at normal temperature or high temperature.
Alternatively, referring to fig. 2, the cell structure may include a controller and a first temperature sensor 3, the first temperature sensor 3 being disposed at each of the first tab 201 and the second tab 202 of the positive electrode tab 11, the controller being configured to control the switching assembly 2 to switch between the first switching state and the second switching state or to control the switching assembly 2 to switch between the third switching state and the fourth switching state according to the first temperature sensor 3. Here, since the temperatures of the first tab 201 and the second tab 202 on the positive electrode tab 11 are easily excessively high, it is possible to conveniently monitor the temperatures of the first tab 201 and the second tab 202 of the positive electrode tab 11 by providing the first temperature sensor 3 at the first tab 201 and the second tab 202 of the positive electrode tab 11. In addition, the controller can control the switching of the switching state of the switch assembly 2, so that the automatic switching of the switching state of the switch assembly 2 is facilitated. Here, in other embodiments, the first temperature sensor 3 may be provided at the first tab 201 and the second tab 202 of the negative electrode tab, for example, when the temperatures of the first tab 201 and the second tab 202 on the negative electrode tab 12 are easily too high, which is not limited by the present disclosure. In addition, the first temperature sensor may be configured as a thermocouple or a thermistor, which is not limited by the present disclosure.
In the exemplary embodiment of the present disclosure, for the positive electrode tab 11 and the negative electrode tab 12 of the battery cell 1, the number of the tabs 20 on the positive electrode tab 11 may be 2 to 10, and correspondingly, the number of the tabs 20 on the negative electrode tab 12 may be 2 to 10, where the number of the tabs 20 on the positive electrode tab 11 and the number of the tabs 20 on the negative electrode tab 12 may be equal. At this time, when the number of the tabs 20 on the positive electrode tab 11 is equal to or greater than three, the battery cell 1 may have a first side and a second side disposed opposite to each other in the length direction of the electrode tab 10, where the number of the tabs 20 on the first side may be equal to the number of the tabs 20 on the second side. For example, when the number of tabs 20 on the positive electrode tab 11 is three, the positive electrode tab 11 may be provided with two tabs 20 on the first side, one tab 20 on the second side, and the negative electrode tab 12 may be provided with one tab 20 on the first side, and two tabs 20 on the second side. Here, when the positive pole piece 11 and the negative pole piece 12 all include a plurality of tabs 20, all can be provided with the switch between every tab 20 and the port 21, at this moment, switch module 2 switches to different on-off states through the controller control, utilize the different tabs 20 on the positive pole piece 11 and the different tabs 20 on the negative pole piece 12, can switch different charge-discharge loops to effectively prevent the temperature of tab 20 too high, do benefit to electric core 1 and can realize high-power output under normal atmospheric temperature or high temperature.
The following describes the specific use of the cell structure in detail in connection with the above embodiments. Referring to fig. 1 and 2, first, when the second temperature sensor detects that the temperature of the battery cell 1 is lower than a preset value, in the case where the port 21 is connected to an external power source, the controller may control the switching assembly 2 to switch to a fifth switching state, at which time the battery cell 1 may be uniformly heated by the heat generated from the positive electrode tab 11, or the controller may control the switching assembly 2 to switch to a sixth switching state, at which time the battery cell 1 may be uniformly heated by the heat generated from the negative electrode tab 12.
When the second sensor detects that the temperature of the battery cell 1 is at a proper temperature, it can be understood that the battery cell 1 does not need to be heated, the controller can control the switch assembly 2 to switch to the first switch state or the second switch state or the third switch state or the fourth switch state.
When high power output is needed, in order to avoid the safety risk caused by the overhigh temperature at the lug 20, the switch state of the switch assembly 2 can be switched, so that the overcurrent risk is reduced; for example, in the first switching state of the switch assembly 2, when the first temperature sensor 3 detects the first tab 201 on the positive electrode tab 11 and/or the temperature of the second tab 202 on the negative electrode tab 12 is too high, the switch assembly 2 may be switched to the second switching state, and similarly, when the switch assembly 2 is in the second switching state, when the first temperature sensor 3 detects the first tab 201 on the negative electrode tab 12 and/or the temperature of the second tab 202 on the positive electrode tab 11 is too high, the switch assembly 2 may be switched to the first switching state. In the third switching state of the switch assembly 2, when the first temperature sensor 3 detects that the temperature of the first tab 201 on the positive electrode tab 11 is too high, and/or the temperature of the first tab 201 on the negative electrode tab 12 is too high, the switch assembly 2 may be switched to the fourth switching state, and similarly, when the switch assembly 2 is in the fourth switching state, when the first temperature sensor 3 detects that the temperature of the second tab 202 on the negative electrode tab 12 is too high, the switch assembly 2 may be switched to the third switching state.
According to a second aspect of the present disclosure, there is provided a battery pack including the cell structure as described above. The battery pack has all the beneficial effects of the above-mentioned battery cell structure, and the disclosure is not repeated here.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. The utility model provides a battery cell structure, its characterized in that, battery cell structure includes electric core and switch module, the electric core include the pole piece and connect in at least two utmost point ears of pole piece, at least two the utmost point ear includes first utmost point ear and second utmost point ear, first utmost point ear with the second utmost point ear is connected respectively the both ends of the length direction of pole piece, switch module is including being used for the port of being connected with external power source, when the port is connected external power source, the port with first utmost point ear, the pole piece reaches the second utmost point ear constitutes heating circuit.
2. The battery cell structure according to claim 1, wherein the battery cell comprises a positive electrode plate and a negative electrode plate, at least two electrode lugs are connected to the positive electrode plate and the negative electrode plate, the first electrode lug and the second electrode lug are respectively arranged at two ends of the positive electrode plate and the negative electrode plate in the length direction,
when the port is connected with the external power supply, the port, the positive pole piece and the first lug and the second lug on the positive pole piece form a heating loop, or the port, the negative pole piece and the first lug and the second lug on the negative pole piece form a heating loop.
3. The cell structure of claim 2, wherein the switch assembly comprises a plurality of switches, the plurality of switches comprising a first switch, a second switch, a third switch, and a fourth switch, the first switch being connected between the port and a first tab of the positive pole piece, the second switch being connected between the port and a second tab of the positive pole piece, the third switch being connected between the port and the first tab of the negative pole piece, the fourth switch being connected between the port and the second tab of the negative pole piece.
4. The cell structure according to claim 3, wherein the switch assembly has a first switch state and a second switch state that are switched with each other, in the first switch state, the first switch and the fourth switch are closed, and the second switch and the third switch are open; in the second switch state, the first switch and the fourth switch are open, and the second switch and the third switch are closed.
5. The cell structure of claim 4, wherein the switch assembly has a third switch state and a fourth switch state that are switched with each other, the third switch state in which the first switch and the third switch are closed and the second switch and the fourth switch are open; in the fourth switch state, the first switch and the third switch are opened, and the second switch and the fourth switch are closed.
6. The cell structure of claim 5, wherein the cell structure comprises a controller and a first temperature sensor, the first temperature sensor is disposed at a first tab and a second tab of the positive electrode tab, and the controller is configured to control the switch assembly to switch between a first switch state and a second switch state or to control the switch assembly to switch between a third switch state and a fourth switch state according to the first temperature sensor.
7. The cell structure of claim 3, wherein the switch assembly has a fifth switch state in which the first switch and the second switch are closed and the third switch and the fourth switch are open.
8. The cell structure of claim 7, wherein the switch assembly has a sixth switch state in which the first and second switches are open and the third and fourth switches are closed.
9. The cell structure of claim 8, wherein the cell structure comprises a controller and a second temperature sensor for detecting a temperature of the cell, the controller for controlling the switching assembly to switch to a fifth or sixth switching state according to the second temperature sensor.
10. A battery pack comprising the cell structure of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321165865.4U CN220021299U (en) | 2023-05-15 | 2023-05-15 | Battery cell structure and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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