Battery module and battery pack with same

Abstract

The battery module comprises a plurality of battery cells and a sampling slave plate, positive electrodes and negative electrodes of the plurality of battery cells are alternately arranged, a pole is arranged close to the edge of one side of each battery cell, a gap is formed between the pole and the edge of the other side of each battery cell, a plurality of gaps form a first mounting space, and the sampling slave plate is arranged in the first mounting space. The sampling slave plate comprises a bracket, a first acquisition chip, a soft plate and a second acquisition chip, the first acquisition chip is arranged at one end of the bracket, the soft plate is arranged at the other end of the bracket, the bracket is arranged in the first mounting space, the first acquisition chip is connected with one part of the battery cells, the soft plate is connected with the other part of the battery cells, and an acquisition strip is arranged on the soft plate; and the second acquisition chip is connected with the acquisition strip on the flexible board. The battery module disclosed by the utility model can be matched with the corresponding sampling slave plates according to the number of the battery cells in the battery module, and can meet the acquisition requirements of battery modules with various string numbers through the matched use of the adjustable acquisition slave plates, and the scheme is flexible and the compatible coverage is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module and a battery pack having the same. Background Art

[0002] The current development trend of power battery systems is the gradual simplification and reduction of structural and electrical components. The entire package has increasingly higher requirements for volume grouping efficiency and power loading. The battery pack can no longer reserve sufficient space for the layout of electrical components such as wiring harnesses, and the trend of electrical de-wiring is becoming more and more obvious.

[0003] Nowadays, blade batteries are being used more and more widely. The blade module adopts an integrated board design, which can greatly reduce the collection wiring harness, and thus this solution is being used more and more.

[0004] In the existing technology, the battery cell uses nickel sheets and is directly connected to the acquisition slave board. The length of the BMS slave board needs to be roughly the same as the battery cell module. When the number of battery cell strings changes, it is not compatible with modules with different numbers of battery cell strings. Since there is a high probability that modules with different numbers of strings will appear in the battery pack, a battery pack solution requires slave boards of multiple specifications, and the slave board specifications cannot be unified and universal. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent at least, and can improve the compatibility of the battery module without affecting the quality of the battery module.

[0006] To this end, an embodiment of one aspect of the present invention provides a battery module.

[0007] Another aspect of the present invention further provides a battery pack having the battery module.

[0008] According to an embodiment of the first aspect of the utility model, the battery module includes: a plurality of battery cells, the plurality of battery cells are arranged in a close contact manner along the thickness direction thereof, the positive and negative electrodes of the plurality of battery cells are placed alternately, the pole is arranged adjacent to one side edge of the battery cell, a gap is provided between the pole and the other side edge of the battery cell, and the plurality of gaps constitute a first installation space; a sampling slave board, the sampling slave board includes a bracket, a first collection chip, a soft board, and a second collection chip, the first collection chip is provided at one end of the bracket, and the soft board is provided at the other end of the bracket; the bracket is arranged in the first installation space, the first collection chip is connected to a part of the battery cells, the soft board is connected to another part of the battery cells, a collection bar is provided on the soft board, and the second collection chip is connected to the collection bar on the soft board.

[0009] According to the battery module of the embodiment of the utility model, the corresponding sampling slave board can be matched according to the number of battery cells inside it. Through the use of adjustable acquisition slave boards, the acquisition requirements of battery modules with various numbers of strings can be covered. The solution is flexible and has strong compatibility coverage.

[0010] In some embodiments, all the collection channels on the first collection chip are directly welded to a portion of the battery cells using nickel sheets.

[0011] In some embodiments, the sampling slave plate further comprises an aluminum bar and a plurality of heat rivet posts. There are two aluminum bars, which are respectively arranged at two ends of the bracket, and the plurality of heat rivet posts are respectively arranged on the two aluminum bars to fix them on the bracket.

[0012] In some embodiments, the battery module also includes an equipotential bar, which is arranged on the top covers of the plurality of battery cells. The equipotential bar is in contact with the aluminum shell of the battery module. The aluminum shell of the battery module can transmit the voltage signal of the battery cell on the opposite side of the equipotential bar to the equipotential bar. The equipotential bar is welded to the sampling plate through a nickel sheet.

[0013] In some embodiments, the number of acquisition channels of the first acquisition chip is greater than or equal to the lowest operating voltage of the sampling slave board.

[0014] In some embodiments, the number of acquisition channels of the second acquisition chip is equal to the number of acquisition interfaces on the acquisition bar on the flexible board.

[0015] In some embodiments, the sum of the number of collection channels of the first collection chip and the number of collection channels of the second collection chip is equal to the number of the plurality of battery cells in the battery module.

[0016] In some embodiments, the number of acquisition channels of the first acquisition chip is n, the thickness between the plurality of battery cells is h, the tolerance gap is m, the design length of the first acquisition chip is L, and L satisfies the formula: L=h*n+(n-1)m.

[0017] In some embodiments, when h is less than 20 mm, the number of the first acquisition chips is two, and all acquisition channels of the two first acquisition chips are directly welded to a portion of the battery core using nickel sheets.

[0018] The battery pack according to the embodiment of the second aspect of the utility model comprises the battery module described in any of the above embodiments.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, rather than limiting the present disclosure. Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of a battery module according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Battery module 100, battery cell 10, pole 11, sampling slave plate 20, bracket 21, first collection chip 22, aluminum bar 23, hot riveting column 24. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown, the battery module 100 according to the embodiment of the first aspect of the present utility model includes a plurality of battery cells 10 and a sampling slave board 20 .

[0026] The multiple battery cells 10 are arranged in a close proximity along their thickness direction, with the positive and negative electrodes of the multiple battery cells 10 placed alternately, and the pole 11 is arranged adjacent to one side edge of the battery cell 10 , with a gap between the pole 11 and the other side edge of the battery cell 10 , and the multiple gaps constitute a first installation space.

[0027] It can be understood that the battery cell 10 in the present invention is a blade battery cell, which is flat as a whole. The battery cell 10 has two first side surfaces along its thickness direction, two second side surfaces along its width direction, and two third side surfaces along its length direction. Multiple battery cells 10 are arranged in close proximity along their thickness direction, that is, the first side surfaces of multiple battery cells 10 are in close proximity to each other. An explosion-proof valve is provided on the second side surface of the battery cell 10, thereby saving and reserving space on the third side surface of the battery cell 10, which is convenient for the later installation of the sampling slave board 20. A pole 11 is provided on the third side surface of the battery cell 10, and the pole 11 is close to the upper edge of the third side surface of the battery cell 10, thereby, there is a gap between the bottom of the pole 11 and the other side edge of the battery cell 10, and multiple gaps constitute the first installation space.

[0028] The sampling slave board 20 includes a bracket 21, a first acquisition chip 22, a soft board (not shown) and a second acquisition chip (not shown). The first acquisition chip 22 is provided at one end of the bracket 21, and the soft board is provided at the other end of the bracket 21. The bracket 21 is provided in the first installation space, the first acquisition chip 22 is connected to a part of the battery cells 10, the soft board is connected to another part of the battery cells 10, a collection bar is provided on the soft board, and the second acquisition chip is connected to the collection bar on the soft board.

[0029] According to the battery module 100 of the embodiment of the utility model, the corresponding sampling slave board 20 can be matched according to the number of battery cells 10 therein. By using the adjustable collection slave board, the collection requirements of battery modules 100 with various numbers of strings can be covered. The solution is flexible and has strong compatibility coverage.

[0030] In some embodiments, Figure 1 As shown, all the collection channels on the first collection chip 22 are directly welded to a portion of the battery core 10 using nickel sheets.

[0031] It can be understood that the sampling slave board 20 contains multiple AFE acquisition chips, specifically including a first acquisition chip 22 and at least one second acquisition chip.

[0032] The voltage collection channel of the first collection chip 22 is assumed to be 18 strings. If the thickness of the battery cell 10 is 21 mm and the tolerance gap reserved between the battery cells is 1 mm, the total length of the battery cell 10 corresponding to the first collection chip 22 in the sampling slave board 20 = 21*18+17 = 395 mm.

[0033] All collection channels of the first collection chip 22 are directly welded with the aluminum bar and the top cover of the battery cell 10 by nickel sheet. All collection channels of the second collection chip are electrically connected with the remaining aluminum bar at the rear and the top cover of the battery cell 10 through the FPC collection strips led out from the soft and hard board welding area.

[0034] It should be noted that the rigid-flex board welding area is a welding area on the bracket 21 .

[0035] In some embodiments, Figure 1 As shown, the sampling slave plate 20 further includes an aluminum bar 23 and a plurality of heat riveting columns 24. There are two aluminum bars 23, and the two aluminum bars 23 are respectively arranged at the two ends of the bracket 21, and the plurality of heat riveting columns 24 are respectively arranged on the two aluminum bars 23 to fix them on the bracket 21.

[0036] It can be understood that the aluminum bar 23, the bracket 21 and the soft board are formed into an assembly of the collecting board 20 through double-sided adhesive and hot riveting columns 24, which is convenient for installation and welding of the whole and the battery cell 10.

[0037] In some embodiments, Figure 1 As shown, the battery module 100 also includes an equipotential bar (not shown), which is arranged on the top cover of multiple battery cells 10, and the equipotential bar is in contact with the aluminum shell of the battery module 100. The aluminum shell of the battery module 100 can transmit the voltage signal of the battery cell 10 on the opposite side of the equipotential bar to the equipotential bar, and the equipotential bar is welded to the sampling slave plate 20 through a nickel sheet.

[0038] It can be understood that an equipotential bar is used on the opposite side of the sampling slave board 20 to transmit the voltage signal on the opposite side to the top cover of the battery cell 10 on the slave board side through the shell of the battery cell 10, and further connected to the first acquisition chip 22 and the second acquisition chip through the nickel sheet.

[0039] In some embodiments, Figure 1 As shown, the number of acquisition channels of the first acquisition chip 22 is greater than or equal to the lowest operating voltage of the sampling slave board 20 .

[0040] In some embodiments, Figure 1 As shown, the number of acquisition channels of the second acquisition chip is equal to the number of acquisition interfaces on the acquisition bar on the flexible board.

[0041] In some embodiments, Figure 1 As shown, the sum of the number of acquisition channels of the first acquisition chip 22 and the number of acquisition channels of the second acquisition chip is equal to the number of the multiple battery cells 10 in the battery module 100 .

[0042] In some embodiments, Figure 1 As shown, the number of collection channels of the first collection chip 22 is n, the thickness between the multiple battery cells 10 is h, the tolerance gap is m, and the design length of the first collection chip 22 is L, which satisfies the formula: L=h*n+(n-1)m.

[0043] It can be understood that the sampling slave board 20 contains multiple AFE acquisition chips, specifically including a first acquisition chip 22 and at least one second acquisition chip.

[0044] The voltage collection channel of the first collection chip 22 is assumed to be 18 strings. If the thickness of the battery cell 10 is 21 mm and the tolerance gap reserved between the battery cells is 1 mm, the total length of the battery cell 10 corresponding to the first collection chip 22 in the sampling slave board 20 = 21*18+17 = 395 mm.

[0045] All collection channels of the first collection chip 22 are directly welded with the aluminum bar and the top cover of the battery cell 10 by nickel sheet. All collection channels of the second collection chip are electrically connected with the remaining aluminum bar at the rear and the top cover of the battery cell 10 through the FPC collection strips led out from the soft and hard board welding area.

[0046] When the second acquisition chip is not mounted, the slave board 20 can be used as an 18S acquisition board.

[0047] In some embodiments, Figure 1 As shown, when h is less than 20 mm, the number of the first acquisition chips 22 is two, and all acquisition channels of the two first acquisition chips 22 are directly welded to a portion of the battery core 10 using nickel sheets.

[0048] It is understandable that when the cell 10 is thinner, such as the cell thickness is 15mm, and the gap between the cells is reserved for 0.5mm, the acquisition board 20 adopts the scheme of setting the front two acquisition chips as the first sampling chips 21, and the two first sampling chips 21 are directly connected to the cell 10 through the nickel sheet. All signals of the second sampling chip are led out through the FPC of the soft pressure plate welding area of ​​the bracket 21 to collect signals of the remaining cells 10.

[0049] At this time, the length of the sampling slave board 20 integrated with three sampling chips is: 15*36+0.5*35=557.5 mm.

[0050] When the second sampling chip is not mounted, the sampling slave board 20 can be used as a 36S acquisition board.

[0051] Furthermore, since the sampling chip has voltage limitations for normal operation, assuming that at least 10 strings of voltage need to be collected for normal operation, the module collection compatibility within a certain string number range can be achieved by adjusting the soft board adapter strip led out from the rear.

[0052] If the sampling slave board 20 integrates two sampling chips, the sampling slave board 20 is compatible with 28-36 series module acquisition solutions. In addition, the sampling slave board 20 can be used as an 18S slave board alone. If the battery pack uses 4 modules, it is compatible with 112S-144S@500V solutions.

[0053] If two 28-36 string modules are used, and then matched with two 18S single acquisition board modules without the second sampling chip, it can be used for 74-90 string battery pack acquisition solution.

[0054] If the slave board integrates 3 sampling chips, the acquisition slave board 20 can be compatible with 46-54 series module acquisition solutions. In addition, the acquisition slave board 20 can be used alone as a 36S slave board. The battery pack uses 4 modules and is compatible with 184S-216S@800V solutions.

[0055] If two 46-54 string modules are used, and then matched with two 18S single acquisition board modules without the second sampling chip, it can be used for 100-126 string battery pack acquisition solutions.

[0056] Compared with the existing solution, the battery module 100 of the utility model saves two sets of communication connectors between slave boards, achieving a certain cost reduction. The acquisition slave board can be compatible with different string number solutions, which can achieve unified specifications, facilitate management and stocking, and thus reduce the comprehensive application cost of the integrated slave board solution. Through the use of adjustable acquisition slave boards, it can cover the acquisition needs of battery packs with a variety of string numbers, with flexible solutions and strong compatibility coverage.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged in a close relationship along the thickness direction thereof, the positive and negative electrodes of the plurality of battery cells are placed alternately, the pole is arranged adjacent to one side edge of the battery cell, and there is a gap between the pole and the other side edge of the battery cell, and the plurality of gaps constitute a first installation space; A sampling slave board, the sampling slave board comprising a bracket, a first acquisition chip, a soft board and a second acquisition chip, one end of the bracket is provided with the first acquisition chip, and the other end of the bracket is provided with the soft board; The bracket is arranged in the first installation space, the first acquisition chip is connected to a part of the battery cells, the flexible board is connected to another part of the battery cells, a collection bar is arranged on the flexible board, and the second acquisition chip is connected to the collection bar on the flexible board.

2. The battery module according to claim 1, characterized in that: All the collection channels on the first collection chip are directly welded to a portion of the battery cells using nickel sheets.

3. The battery module according to claim 1, characterized in that: The sampling slave plate also includes an aluminum bar and a plurality of hot rivet studs; There are two aluminum bars, which are respectively arranged at two ends of the bracket, and a plurality of hot riveting columns are respectively arranged on the two aluminum bars to fix them on the bracket.

4. The battery module according to claim 1, characterized in that: Also includes: The equipotential bar is arranged on the top cover of the plurality of battery cells, the equipotential bar is in contact with the aluminum shell of the battery module, the aluminum shell of the battery module can transmit the voltage signal of the battery cell on the opposite side of the equipotential bar to the equipotential bar, and the equipotential bar is welded to the sampling plate through a nickel sheet.

5. The battery module according to claim 1, characterized in that: The number of acquisition channels of the first acquisition chip is greater than or equal to the lowest operating voltage of the sampling slave board.

6. The battery module according to claim 5, characterized in that: The number of acquisition channels of the second acquisition chip is equal to the number of acquisition interfaces on the acquisition bar on the flexible board.

7. The battery module according to claim 6, characterized in that: The sum of the number of collection channels of the first collection chip and the number of collection channels of the second collection chip is equal to the number of the plurality of battery cells in the battery module.

8. The battery module according to claim 1, characterized in that: The number of acquisition channels of the first acquisition chip is n, the thickness between the multiple battery cells is h, the tolerance gap is m, and the design length of the first acquisition chip is L, and L satisfies the formula: L=h*n+(n-1)m.

9. The battery module according to claim 8, characterized in that: When h is less than 20 mm, the number of the first acquisition chips is two, and all acquisition channels of the two first acquisition chips are directly welded to a part of the battery core using nickel sheets.

10. A battery pack, characterized in that: include: A plurality of battery modules, wherein the battery modules are the battery modules according to any one of claims 1 to 9.

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