CN218602501U - Battery core, single battery and battery pack - Google Patents
Battery core, single battery and battery pack Download PDFInfo
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- CN218602501U CN218602501U CN202222558425.7U CN202222558425U CN218602501U CN 218602501 U CN218602501 U CN 218602501U CN 202222558425 U CN202222558425 U CN 202222558425U CN 218602501 U CN218602501 U CN 218602501U
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to an electricity core, battery cell and battery package, electricity core include along a plurality of positive plates and a plurality of negative pole pieces that pole piece thickness direction set up in turn, are equipped with the diaphragm between adjacent positive plate and the negative pole piece, and the first coating face of positive plate is equipped with first anodal active material layer with one of second coating face, is equipped with second anodal active material layer on another, and the thermal stability of first anodal active material layer is less than the thermal stability of second anodal active material layer. The utility model discloses a most heat that the less positive pole active material layer thermal collapse of thermal stability produced can the high thermostability positive pole active material layer carry out the separation layer upon layer to delay or prevent the inside thermal runaway of battery cell to a certain extent and stretch, and then delayed or prevented battery package, the whole car level of system's thermal diffusion and stretch, provide sufficient time of fleing for the whole car passenger.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to electricity core, battery cell and battery package.
Background
The existing single battery generally has two types, one type is composed of a high-safety positive electrode material, such as Lithium Cobaltate (LCO), lithium Iron Phosphate (LFP), lithium manganese Phosphate (LMFP), and the like. The battery has the advantages of high thermal stability, long cycle life and the like, but the energy density is low, and the high endurance requirement cannot be met. Still another battery is composed of a high energy density positive electrode material, such as ternary Nickel Cobalt Manganese Based lithium Materials (NCM), which has the advantages of high energy density and high voltage plateau, but has low thermal stability and is very prone to thermal runaway propagation.
Due to the requirement of longer endurance mileage of the electric automobile, the energy density requirement of the corresponding matched single battery is higher and higher, but the corresponding chemical thermal stability performance of the single battery is deteriorated, and the single battery has certain threat to the life and property safety of the whole automobile and passengers. In order to solve the problem, special heat diffusion prevention design such as natural cooling, air cooling, liquid cooling and the like is needed in the prior art, the structure of the battery pack is relatively complex, on one hand, the mass of the module and the mass of the battery pack are increased, the mass energy density of the battery pack is reduced, and on the other hand, the manufacturing cost is also increased. Therefore, there is a need for a battery having high safety and high energy density, which can effectively suppress the spread of heat without additionally adding a complicated thermal runaway prevention design.
Disclosure of Invention
The utility model aims at providing an electricity core, battery cell and battery package to solve among the prior art battery cell and can not combine the problem of energy density demand and chemical heat stability ability concurrently.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an electric core, which comprises a plurality of positive plates and a plurality of negative plates which are alternately arranged along the thickness direction of a pole piece, wherein a diaphragm is arranged between the adjacent positive plates and the adjacent negative plates;
the positive plate comprises a first coating surface and a second coating surface which are oppositely arranged along the thickness direction of the positive plate, wherein one of the first coating surface and the second coating surface is provided with a first positive active material layer, and the other one of the first coating surface and the second coating surface is provided with a second positive active material layer;
the first positive electrode active material layer has a thermal stability lower than that of the second positive electrode active material layer.
Further, the self-heat release initiation temperature of the first positive electrode active material layer is T 1 The interval time from the initial state to the self-heat-release critical state of the first positive electrode active material layer is t 1 The first positive electrode active material layer has a thermal runaway onset temperature T 2 The interval time from the initial state to the thermal runaway critical state of the first positive electrode active material layer is t 2 ；
The self-heat-release starting temperature of the second positive electrode active material layer is T 3 The interval time from the initial state to the self-heat-release critical state of the second positive electrode active material layer is t 3 The thermal runaway onset temperature of the second positive electrode active material layer is T 4 The interval time from the initial state to the thermal runaway critical state of the second positive electrode active material layer is t 4 ；
Wherein, the first and the second end of the pipe are connected with each other,
T 1 +T 2 +2(t 2 -t 1 )<T 3 +T 4 +2(t 4 -t 3 )
further, the battery cell meets the following requirements:
0℃<T 3 -T 1 ≤70℃
further, the battery cell meets the following requirements:
0℃<T 4 -T 2 ≤110℃
further, the battery cell meets the following requirements:
0h≤(t 4 -t 3 )-(t 2 -t 1 )≤49.5h
furthermore, the plurality of positive plates comprise first positive plates and second positive plates, the first positive plates and the second positive plates are alternately arranged along the thickness direction of the plates, and one negative plate is arranged between the adjacent first positive plates and the second positive plates.
Furthermore, N first positive plates are sequentially arranged along the thickness direction of the pole pieces to form a first circulation unit, N is more than or equal to 2, a negative plate is arranged between every two adjacent first positive plates in the first circulation unit, and the first positive plates with the first order and the Nth order are respectively adjacent to one second positive plate;
and/or N second positive plates are sequentially arranged along the thickness direction of the pole pieces to form a second circulation unit, N is more than or equal to 2, one negative plate is arranged between every two adjacent second positive plates in the second circulation unit, and the second positive plates with the first bit sequence and the N bit sequence inside the second circulation unit are respectively adjacent to the first positive plates.
Further, the battery cell comprises a plurality of first circulation units, and the number of the first positive pole pieces in any two of the first circulation units is the same in the plurality of first circulation units; and/or the presence of a gas in the atmosphere,
the battery cell comprises a plurality of second circulating units, and the number of second positive plates in any two of the second circulating units is the same in the plurality of second circulating units.
The invention also provides a single battery, which comprises one or more battery cores.
The invention also provides a battery pack which comprises the single battery.
Furthermore, two adjacent battery cores are bonded and fixed through a blue glue layer.
Correspondingly, the embodiment of the application also provides a battery pack, which comprises the single battery.
The utility model discloses owing to take above technical scheme, it possesses following beneficial effect:
one of the first coating surface and the second coating surface of the positive plate is provided with a first positive active material layer, the other of the first coating surface and the second coating surface is provided with a second positive active material layer, the thermal stability of the positive first positive active material layer is lower than that of the second positive active material layer, when the electric core is subjected to thermal runaway or local high-temperature failure occurs in the single battery, the positive active material layer with lower thermal stability preferentially undergoes thermal collapse and releases a large amount of heat at the same time, but because the adjacent or adjacent positive active material layer has higher thermal stability, an energy group partition wall is formed in the single battery, most of the heat generated by the thermal collapse of the positive active material layer with lower thermal stability can be blocked by the positive active material layer with high thermal stability, the thermal runaway in the single battery is delayed or prevented to a certain extent, and therefore, thermal diffusion and spread of a battery pack and a whole vehicle level system are delayed, and sufficient escape time is provided for passengers on the whole vehicle.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an ABAB assembly of a positive active material layer of a battery cell provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an AABB assembly of a positive active material layer of a battery cell provided by an embodiment of the present invention;
fig. 3 is a graph of thermal characteristics versus temperature versus time for a battery according to an embodiment of the present invention;
the reference symbols in the drawings denote the following:
1. a positive plate; 11. a positive current collector; 12. a first positive electrode active material layer; 13. a second positive electrode active material layer; 2. a negative plate; 3. a diaphragm.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Since the conventional single battery cannot combine the energy density requirement and the chemical thermal stability. The invention provides an electric core and a single battery, wherein the electric core comprises a plurality of positive plates and a plurality of negative plates which are alternately arranged along the thickness direction of the plates, one of a first coating surface and a second coating surface on the positive plates is provided with a first positive active material layer, the other one is provided with a second positive active material layer, and the thermal stability of the first positive active material layer is lower than that of the second positive active material layer. When the battery core is in thermal runaway or local high-temperature failure occurs in the single battery, most heat generated by thermal collapse of the positive active material layer with low thermal stability can be blocked layer by the positive active material layer with high thermal stability, so that thermal runaway spread in the single battery is delayed or prevented to a certain extent.
The embodiment of the present invention will be described in detail by way of examples.
Examples
As shown in fig. 1, the utility model provides an electric core, include along a plurality of positive plates 1 and a plurality of negative pole piece 2 that pole piece thickness direction set up in turn, be equipped with diaphragm 3 between adjacent positive plate 1 and the negative pole piece 2. The positive plate 1 comprises a first coating surface and a second coating surface which are oppositely arranged along the thickness direction, wherein one of the first coating surface and the second coating surface is provided with a first positive active material layer 12, and the other one of the first coating surface and the second coating surface is provided with a second positive active material layer 13;
the self-heat release starting temperature of the first positive electrode active material layer is T 1 The interval time from the initial state to the self-heat-release critical state of the first positive electrode active material layer is t 1 The first positive electrode active material layer has a thermal runaway onset temperature T 2 The interval time from the initial state to the thermal runaway critical state of the first positive electrode active material layer is t 2 ；
The self-heat release starting temperature of the second positive electrode active material layer is T 3 The interval time from the initial state to the self-heat-release critical state of the second positive electrode active material layer is t 3 The thermal runaway onset temperature of the second positive electrode active material layer is T 4 The interval time from the initial state to the thermal runaway critical state of the second positive electrode active material layer is t 4 ；
Wherein the content of the first and second substances,
T 1 +T 2 +2(t 2 -t 1 )<T 3 +T 4 +2(t 4 -t 3 )
in this embodiment, the first positive active material layer is a low thermal stability material relative to the second positive active material layer, and the second positive active material layer is a high thermal stability material relative to the first positive active material layer.
It should be noted that, as shown in fig. 3, the parameters in the above formula can be measured by the ARC test method for lithium ion battery safety evaluation, specifically, the battery is suspended in the thermal chamber (or placed on the support), the temperature-controlled thermocouple of the ARC is firmly fixed at the center of the large surface of the battery, after the test is started, the battery is in the thermal insulation environment in the ARC thermal chamber without heat exchange with the ambient environment, the ARC thermally triggers the battery to be tested by the "step-up", and at each temperature step, when the battery and the ambient temperature are sufficiently equalizedAfter the stabilization, detecting the Self-heat-generating Rate (SHR) of the battery, if the SHR is less than or equal to 0.02 ℃/min, judging that the Self-heat-generating reaction does not occur in the battery, continuing to perform the next temperature step until the SHR is more than 0.02 ℃/min, namely the Self-heat-generating reaction begins to occur in the active material layer coated on the positive plate in the battery, and measuring the Self-heat-generating initial temperature T of the first positive active material layer 1 And the interval time t from the initial state to the self-heat-release critical state of the first positive electrode active material layer 1 And the self-heat-release initiation temperature of the second positive electrode active material layer was measured as T 3 And the interval time t from the initial state to the self-heat-release critical state of the second positive electrode active material layer 3 After that, the equipment stops the 'step temperature rise' mode, enters into the adiabatic mode (Exothermal), and the calorimetric cavity follows the temperature of battery in real time and remains the unanimity all the time for the battery is continuous in adiabatic environment from the heat production until taking place the thermal runaway, when the temperature rise rate of battery reaches 1 ℃/min, can regard as the beginning of thermal runaway, here can record the utility model discloses in the thermal runaway initial temperature T of first positive pole active material layer 2 And the interval time t from the initial state to the critical state of thermal runaway of the first positive electrode active material layer 2 Measuring the thermal runaway onset temperature T of the second positive electrode active material layer 4 And the interval time t from the initial state to the thermal runaway critical state of the second positive electrode active material layer 4 Qualitatively, a higher thermal runaway onset temperature indicates better thermal stability of the active material layer, Δ t = (t) 2 -t 1 ) Or (t) 4 -t 3 ) The longer the time of (a) also indicates the better the thermal stability of the active material layer, and Δ t is the thermal runaway incubation time.
In a preferred embodiment, in order to more effectively prevent the internal thermal runaway from occurring and spreading, the parameters of the first positive electrode active material layer and the second positive electrode active material layer in the above formula satisfy the following conditions:
T 1 <T 3 ，T 2 <T 4 and (t) and 2 -t 1 )≤(t 4 -t 3 )
based on the above conditions, the second positive electrode active material layer is higher than the first positive electrode active material layer in both self-heating starting temperature and thermal runaway starting temperature, and the sum of the thermal runaway incubation time of the second positive electrode active material layer and not less than that of the first positive electrode active material layer, and the sum of the self-heat release starting temperature, the thermal runaway starting temperature and twice thermal runaway incubation time of the second positive electrode active material layer is greater than that of the first cell, and the sum of the thermal runaway starting temperature and twice thermal runaway incubation time of the first cell, and the overall thermal stability of the second positive electrode active material layer is much higher than that of the first positive electrode active material layer.
Specifically, for convenience of material selection, the following inequality relationship may be satisfied:
0℃<T 3 -T 1 ≤70℃
T 1 and T 3 Under the condition of satisfying the inequality, the materials are selected from a plurality of types, such as conventional ternary lithium ternary system, ternary lithium quinary system and ternary lithium hexabasic low thermal stability materials, conventional high thermal stability materials of lithium iron phosphate materials, in a preferred embodiment,
60℃≤T 1 <130℃，60℃<T 3 the self-heating starting temperature of the material is higher and the probability of the thermal failure of the single battery is relatively low, wherein the temperature is lower than or equal to 130 ℃.
Similarly, for convenience of material selection, the following inequality relationship can also be satisfied:
0℃<T 4 -T 2 ≤110℃
T 4 and T 2 Under the condition of satisfying the inequality, the materials are selected from various types, such as conventional ternary lithium ternary system, ternary lithium quinary system and ternary lithium hexabasic low thermal stability materials, conventional high thermal stability materials of lithium iron phosphate materials, in a preferred embodiment,
110℃≤T 2 <220℃，110℃<T 4 the thermal runaway starting temperature of the material is higher than or equal to 220 ℃, the probability of detonation of the single battery is relatively lower, and the safety of the battery is higher.
Also, for convenience of material selection, the following inequality relationship can be satisfied:
0h≤(t 4 -t 3 )-(t 2 -t 1 )≤49.5h
when the difference between the two thermal runaway incubation times of the first positive electrode active material layer and the second positive electrode active material layer satisfies the inequality, there are many kinds of materials, such as conventional ternary lithium ternary system, ternary lithium quinary system and ternary lithium hexaary system low thermal stability materials, conventional high thermal stability materials of lithium iron phosphate materials, in a preferred embodiment,
0.5h≤(t 2 -t 1 )<50h，0.5h<(t 4 -t 3 )≤50h
like this when BMS monitors the battery and takes place thermal failure and report to the police, can give the driver on the electric motor car and the abundant reaction time of passenger, flee the car fast outside, guarantee personnel's safety.
For this, several data measured by the ARC test method are provided below as a proof reference for the feasibility of the ARC test method.
Wherein "LEP" is an abbreviation of lithium iron phosphate battery, "NCM" is an abbreviation of ternary lithium battery, and we classify the scores as follows: the thermal stability of the lithium iron phosphate battery is ranked highly and lowly according to the score analysis in the table, wherein the score is poor under 60-120, the score is general under 60-120, the score is better under 120-200, and the score is better under 200: lithium iron phosphate battery > ternary three lithium cell > ternary six lithium cell the utility model discloses an in through set up the positive plate that has the active coating of lithium iron phosphate in with same battery cell and the positive plate that has the active coating of ternary lithium and mix the collocation for the battery product that obtains is higher than the lithium iron phosphate battery with positive plate quantity on energy density, and the heat stability is higher than the ternary lithium cell with positive plate quantity, has played the effect that energy density and heat stability decide two promotions.
Further, a plurality of positive electrode plates 1 are provided;
a first positive active material layer 12 is arranged on the first coating surface of any positive plate 1;
or the first coated surface of any positive electrode sheet 1 is provided with a second positive electrode active material layer 13.
The first positive electrode active material layer 12 is a high-energy density material layer, and the high-energy density material layer is made of ternary lithium nickel cobalt manganese oxide, ternary NCA and the like; the second positive electrode active material layer 13 is a high thermal stability material layer, and the high thermal stability material layer is made of main materials such as lithium iron phosphate LFP, lithium manganese iron phosphate LMFP, lithium cobaltate LiCoO2, lithium nickelate LiNiO2, lithium manganese LiMn2O4, or carbon-coated modified materials.
Further, a plurality of positive electrode plates 1 are provided;
the positive plate 1 comprises a first positive plate and a second positive plate;
a first positive electrode active material layer 12 is arranged on the first coating surface of the first positive electrode plate, and a second positive electrode active material layer 13 is arranged on the second coating surface of the first positive electrode plate;
the first coating surface of the second positive plate is provided with a second positive active material layer 13, and the second coating surface of the second positive plate is provided with a first positive active material layer 12.
One preferred embodiment is: as shown in fig. 1, the battery cell of this embodiment includes a plurality of first positive plates disposed along the thickness direction of the pole pieces, and a negative plate 2 is disposed between two adjacent first positive plates. Through the arrangement of the structure, namely the first positive active material layer 12 is set as an A-surface coating layer, and the second positive active material layer 13 is set as a B-surface coating layer, so that an ABAB.
One preferred embodiment is: as shown in fig. 2, the battery cell of this embodiment includes a plurality of first positive plates and a plurality of second positive plates that are arranged along the thickness direction of the pole pieces, the first positive plates and the second positive plates are alternately arranged along the thickness direction of the pole pieces, and a negative plate 2 is arranged between the adjacent first positive plates and the adjacent second positive plates. By setting the structure, that is, setting the first positive electrode active material layer 12 as an a-side coating layer and the second positive electrode active material layer 13 as a B-side coating layer, a combined cell design structure can be formed in the thickness direction of the pole piece.
One preferred embodiment is: n first positive plates are sequentially arranged along the thickness direction of the pole piece to form a first circulation unit, and N is larger than or equal to 2. In the first circulation unit, a negative plate 2 is arranged between two adjacent first positive plates, and the first positive plates with the first order and the Nth order are adjacent to a second positive plate respectively;
and/or N second positive plates are sequentially arranged along the thickness direction of the pole piece to form a second circulation unit, wherein N is more than or equal to 2. In the second circulation unit, a negative plate 2 is arranged between two adjacent second positive plates, and the second positive plates in the first order and the second N-order are adjacent to a first positive plate respectively.
Further, the battery cell comprises a plurality of first circulation units, and the number of the first positive plates in any two of the first circulation units is the same;
and/or the battery cell comprises a plurality of second circulating units, and the number of the second positive pole pieces in any two of the second circulating units is the same in the plurality of second circulating units.
One preferred embodiment is: the battery cell comprises a plurality of first circulating units, wherein the number of the first positive plates in at least two first circulating units is different;
and/or the battery core comprises a plurality of second circulating units, and in the plurality of second circulating units, the number of the second positive pole pieces in at least two second circulating units is different.
Through the arrangement of the structure, the first positive active material layer 12 is set as an A surface coating layer, the second positive active material layer 13 is set as a B surface coating layer, and the number of the positive plates 1 in the first circulation unit and/or the second circulation unit can be adjusted at will so as to form a battery cell design structure such as an ABAABB.
Further, the negative electrode sheet 2 comprises a third coating surface and a fourth coating surface which are oppositely arranged along the thickness direction, and at least one of the third coating surface and the fourth coating surface is provided with a negative electrode material active coating. The negative active material layer has one or more laminated structures formed by laminating and compounding a semiconductor material and a good conductor material. The semiconductor material is preferably SiCx, si, or the like, and the good conductor material is preferably natural graphite, artificial graphite, or the like.
The invention also provides a single battery, which comprises one or more battery cores. And the two adjacent battery cores are fixedly bonded through a blue glue layer. When the electric core is in thermal runaway or local high-temperature failure occurs in the single battery, the first positive active material layer 12 with lower thermal stability preferentially undergoes thermal collapse and releases a large amount of heat, but because the adjacent or adjacent second positive active material layer 13 has higher thermal stability, one energy group partition wall is formed in the single battery, most of the heat generated by the thermal collapse of the first positive active material layer 12 can be blocked by the second positive active material layer 13 with high thermal stability, and the thermal runaway spread inside the single battery is delayed or prevented to a certain extent, so that the thermal diffusion spread of a battery pack and a whole vehicle level of a system is delayed or prevented, and enough escape time is provided for passengers on the whole vehicle layer by layer. The utility model discloses an electricity core and battery cell have reduced the complicated solar heat protection diffusion structural design of whole car, have reduced the battery cell structure and have increased energy density and reduce manufacturing cost, especially have improved whole car system security.
Correspondingly, the embodiment of the present application further provides a battery pack, where the battery pack includes the above single battery, and it can be understood that the battery pack may have all technical features and beneficial effects of the above single battery, and details are not repeated herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An electric core is characterized in that the electric core comprises a plurality of positive plates and a plurality of negative plates which are alternately arranged along the thickness direction of a pole piece, and a diaphragm is arranged between the adjacent positive plates and the adjacent negative plates;
the positive plate comprises a first coating surface and a second coating surface which are oppositely arranged along the thickness direction of the positive plate, wherein a first positive active material layer is arranged on one of the first coating surface and the second coating surface, and a second positive active material layer is arranged on the other one of the first coating surface and the second coating surface;
the first positive electrode active material layer has a thermal stability lower than that of the second positive electrode active material layer.
2. A cell according to claim 1,
the self-heat release starting temperature of the first positive electrode active material layer is T 1 The interval time from the initial state to the critical state of self-heat release of the first positive electrode active material layer is t 1 The first positive electrode active material layer has a thermal runaway onset temperature T 2 The interval time from the initial state to the thermal runaway critical state of the first positive electrode active material layer is t 2 ；
The self-heat-release starting temperature of the second positive electrode active material layer is T 3 The second positive electrode active material layer is from an initial state to a self-exothermic critical stateInterval time t 3 The thermal runaway onset temperature of the second positive electrode active material layer is T 4 The interval time from the initial state to the thermal runaway critical state of the second positive electrode active material layer is t 4 ；
Wherein the content of the first and second substances,
T 1 +T 2 +2(t 2 -t 1 )<T 3 +T 4 +2(t 4 -t 3 )
3. the cell of claim 2, wherein the cell satisfies:
0℃<T 3 -T 1 ≤70℃
4. the cell of claim 2, wherein the cell satisfies:
0℃<T 4 -T 2 ≤110℃
5. the cell of claim 2, wherein the cell satisfies:
0h≤(t 4 -t 3 )-(t 2 -t 1 )≤49.5h
6. the battery cell according to claim 1, wherein the plurality of positive plates include a first positive plate and a second positive plate, the first positive plate and the second positive plate are alternately arranged in a thickness direction of the plate, and the negative plate is arranged between the adjacent first positive plate and the second positive plate.
7. A cell according to claim 6,
the N first positive plates are sequentially arranged along the thickness direction of the plate to form a first circulation unit, N is more than or equal to 2, a negative plate is arranged between every two adjacent first positive plates in the first circulation unit, and the first positive plates with the first bit sequence and the N bit sequence are respectively adjacent to the second positive plate;
and/or N second positive plates are sequentially arranged along the thickness direction of the pole pieces to form a second circulation unit, N is more than or equal to 2, one negative plate is arranged between every two adjacent second positive plates in the second circulation unit, and the second positive plates with the first bit sequence and the second internal N bit sequence are respectively adjacent to the first positive plates.
8. A cell according to claim 7,
the battery cell comprises a plurality of first circulating units, and the number of first positive plates in any two first circulating units in the plurality of first circulating units is the same; and/or the presence of a gas in the atmosphere,
the battery core comprises a plurality of second circulating units, and the number of the second positive plates in any two of the second circulating units is the same in the plurality of second circulating units.
9. A battery cell, comprising one or more cells according to any of claims 1-8.
10. A battery pack comprising the battery cell of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222558425.7U CN218602501U (en) | 2022-09-27 | 2022-09-27 | Battery core, single battery and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222558425.7U CN218602501U (en) | 2022-09-27 | 2022-09-27 | Battery core, single battery and battery pack |
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| CN218602501U true CN218602501U (en) | 2023-03-10 |
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| CN202222558425.7U Active CN218602501U (en) | 2022-09-27 | 2022-09-27 | Battery core, single battery and battery pack |
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- 2022-09-27 CN CN202222558425.7U patent/CN218602501U/en active Active
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518108 Floor 1-2, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen, Guangdong, China Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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